Service technicians have no problem recognising breakdowns and carrying out machine diagnostics, MAN FFR Error codes list, plus they are familiar with equipment from a variety of manufacturers.
MAN FFR fault codes list
| Code (SPN) | Description | The reason, check and reaction of the system. |
| 32 | The state of the divider. | Priority 3. Display only when the vehicle is stationary, only an indication of a malfunction, an indication of the action for the error is not required. On a stationary vehicle, the STOPwarning light is yellow. Could not determine the state of the divider for the set measurement time Check the circuit, contacts in the connectors and the accuracy of the speed sensor readings at the entrance to the gearbox (V368).Check the accuracy of the rotation signal using a PC. Check resistance: on the FFR side ,between contacts X3 / 12 (+) and X1 / 3 (-), the resistance should be approximately 1.78 kΩ, on the sensor side, the resistance should correspond to approximately 1.05 kΩ. Check the voltage between the contacts of the blockFFR X3 / 12 (+) and X1 / 3 (-), the voltage should be approximately 1 V. at idle. Note: see SPN 770 and 771. |
| 161 | The rotational speed at the entrance to the gearbox. | Priority 3. Display only when the vehicle is stationary, only an indication of a malfunction, an indication of the action for the error is not required. On a stationary vehicle, the STOPwarning light is yellow. Incorrect signal from the speed sensor at the entrance to the gearbox (V368) The status “signal unavailable” is set, it is impossible to determine the status of the divider, the ” Comfort – Shift ” function isblocked. Check the circuit, contacts in the connectors and the accuracy of the speed sensor readings at the entrance to the gearbox (V368).Check the accuracy of the rotation signal using a PC. Check resistance: on the FFR side ,between contacts X3 / 12 (+) and X1 / 3 (-), the resistance should be approximately 1.78 kΩ, on the sensor side, the resistance should correspond to approximately 1.05 kΩ. Check the voltage between the contacts of the blockFFR X3 / 12 (+) and X1 / 3 (-), the voltage should be approximately 1 V. at idle. |
| 168 | Battery supply voltage. | Priority 3. Display only when the vehicle is stationary, only an indication of a malfunction, an indication of the action for the error is not required. On a stationary vehicle, the STOPwarning light is yellow. The operating voltage is greater than 32 V. Check the accuracy of the signal using a PC, check the wiring, contacts in the connectors, the generator and batteries.Check the voltage at the contacts of the FFR X1 / 2, X1 / 1 (+), X1 / 3 (-) unit, the voltage should be between 20 and 28 V. If the voltage measured on the FFR unit connectors is normal, replace the FFR unit . |
| 168 | Battery supply voltage. | Priority 3. Display only when the vehicle is stationary, only an indication of a malfunction, an indication of the action for the error is not required. On a stationary vehicle, the STOPwarning light is yellow. The operating voltage is less than 16 V. Check the accuracy of the signal using a PC, check the wiring, contacts in the connectors, the generator and batteries.Check the voltage at the contacts of the FFR X1 / 2, X1 / 1 (+), X1 / 3 (-) unit, the voltage should be between 20 and 28 V. If the voltage measured on the FFR unit connectors is normal, replace the FFR unit . |
| 572 | Auxiliary device for activating the retarder (retarder). | Priority 5: Indication during stop and while driving. The STOP warning light illuminates in yellow both when driving and when stopped or stopped. The wiring of the data line from the retarder control touch switch is faulty. The switch ceases to function. The activated brake retarder is deactivated by pressing the accelerator pedal. Check the accuracy of the signal using a PC, check the wiring, contacts in the connectors, the touch switch of the retarder.Check the resistance of the data line from the touch switch, between the contacts of the blockFFR X2 / 10 (+) and X1 / 3 (-) on the side of the block FFR approximately 1.5 MΩ, on the side of the car approximately 1.6 MΩ. Check the resistance of the synchronization wire of the touch-sensitive switch of the retarder, between the contacts of the FFR X2 / 6 (+) and X 1/3 (-) blocks on the side of the FFR block ,approximately 1.7 MΩ, on the side of the car approximately 1.2 MΩ. Check the voltage of the data line from the touch switch, between the contacts of the FFR X2 / 10 (+) and X1 / 3 (-) block, the jumper (test block) is closed: approximately 14.2 V., the jumper (test block) is open: on the side FFR unit approx . 23.5 V,approx. 14 V on the vehicle side . Check the voltage of the synchronizer wire of the retarder touch switch, between the contacts of the FFRX2 / 6 (+) and X 1/3 (-) unit the jumper (test unit) is closed: approximately 12 3 V., jumper (trial block) open: to block side FFR approx13,5 V. tionary, vehicle side approximately 22.5 V. |
| 697 | Accelerator pedal, PWM 1 signal (pulse width modulated signal). | Priority 2: Fault requiring elimination at a service center. The STOP warning light is permanently red. PWM 1 Accelerator Pedal (A410) signal is missing or incorrect . ThePWM 2 signal is used to identify the accelerator pedal position . Engine speed and torque are limited (1,800 rpm and 80% limit). Check the accuracy of the PWM 1 signal using a PC, check the wiring, contacts in the connectors.Measure with a Fluke handheld oscilloscopeScopeMeter 123 or similar device (frequency 200 Hz). Check the voltage on the FFR unitbetween pins X2 / 11 (+) and X1 / 3 (-): jumper (test block) is closed, Low signal : (accelerator pedal fully depressed) approximately 8 V.,HIGH signal : approximately 20 V. jumper (test block) is open: on the side of the FFR block isapproximately 25.4 V., from the side of the car is approximately 0.5 V. If the fault is not found, try to recalibrate the accelerator pedal. If the voltage drop with the ignition on at PWM 1 (A410 / pin 5) and the power supply at PWM 2 (A410 / pin 6) is more than 100 ms, a fault code is recorded. |
| 698 | Accelerator pedal, PWM 2 signal (pulse width modulated signal). | Priority 2: Fault requiring elimination at a service center. The STOP warning light is permanently red. PWM 2 Accelerator Pedal (A410) signal missing or incorrect . The PWM1 signal is used to identify the accelerator pedal position . Engine speed and torque are limited (1,800 rpm and 80% limit). Check the accuracy of the PWM 2 signal using a PC, check the wiring, contacts in the connectors. Measure with a Fluke handheld oscilloscope ScopeMeter123 or similar device (frequency 200 Hz).Check the voltage on the FFR unit betweenpins X2 / 18 (+) and X1 / 3 (-): jumper (test block) is closed, Low signal : approximately 8 V., HIGH signal (accelerator pedal fully depressed): approximately 20 V. jumper (test block) is open: on the side of the FFR block isapproximately 25.5 V., on the vehicle side is approximately 0 V. If the fault is not found, try to recalibrate the accelerator pedal. If the voltage drop with the ignition on at PWM 1 (A410 / pin 5) and the power supply at PWM 2 (A410 / pin 6) is more than 100 ms, a fault code is recorded. |
| 770 | Split H. | Priority 5: Indication during stop and while driving. The STOP warning light illuminates in yellow both when driving and when stopped or stopped. A fault has been detected in the wiring of the SPLIT – HIGH solenoid valve ( Y 307).The fault is recorded in the fault recorder in case the fault is registered within three measurement cycles (500ms). The valve of the divider is no longer controlled. Using a PC, perform testing of the elements ” SPLIT -HIGH ” and ” SPLIT – LOW “. Check the resistance between the contacts X3 / 13 (+) and X4 / 6 (-): on the side of the FFR block isapproximately 6 kΩ, on the side of the car is approximately 83.3 Ohms. Check the resistance between the contacts X3 / 13 (+) and X1 / 3 (-): on the side of the FFR block approximately 4.3 kΩ, on the side of the car —. Check the voltage between the contacts of the FFR unit{3/13 (+) and X4 / 6 (-): with an activated solenoid valve of approximately 27.6 V. with a deactivated valve of approximately 0 V. |
| 771 | Separate L. | Priority 5: Indication during stop and while driving. The STOP warning light illuminates in yellow both when driving and when stopped or stopped. A fault has been found in the wiring of the SPLIT – LOW solenoid valve ( Y 307). The fault is recorded in the fault recorder in case the fault is registered within three measurement cycles (500ms). The valve of the divider is no longer controlled. Using a PC, perform testing of the elements ” SPLIT – HIGH ” and ” SPLIT- LOW “. Check the resistance between the contacts X4 / 7 (+) and X4 / 6 (-): on the side of the FFR block is approximately 6 kΩ, on the side of the car is approximately 84.6 Ohms.Check the resistance between the contacts X4 / 7 (+) and X1 / 3 (-): on the side of the FFRblock approximately 4.3 kΩ, on the side of the car —. Check the voltage between the contacts of the FFR unit {4/7 (+) and X4 / 6 (-): with the activated solenoid valve approximately 27.6 V. with the deactivated valve approximately 0 V. |
| 898 | Group of maximum speed resistors. | Priority 5: Indication during stop and while driving. The STOP warning light illuminates in yellow both when driving and when stopped or stopped. Incorrect signal from the resistor group ( R 134). The HGB stage (maximum speed limit) remains active. After the next power up, the RGB 0 level is selected (the maximum speed limit 1 is activated). Using a PC, check the accuracy of the signal, check the wiring, contacts in the connectors, check the X1996 body interface, check the group of resistors ( R134). Check the resistance between pins X2 / 6 (+) and X1 / 3 (-) on the side of the FFR unit isapproximately 6.5 kΩ, on the side of the car is approximately 0.511 kΩ. Check the resistance of the resistor group ( R 134): between pins 5 and 7/6 approximately 3.09 kΩ, between pins 5 and 3/4 approx. 1.37 kΩ, between contacts 5 and 2/8 approximately 0.51 kΩ, between contacts 5 and 1/9 is approximately 8.2 kΩ.Check the voltage between the contacts of theFFR unit : X2 / 6 (+) and X1 / 3 (-) of approximately 460 mV. |
| 1045 | The final stage of blocking the inclusion of the transfer. | Priority 5: Indication during stop and while driving. The STOP warning light illuminates in yellow both when driving and when stopped or stopped. A closure at the output of the blocking inclusion of the transfer (final stage) of the block of solenoid valves ( Y 307). Transmission enable lock is no longer controlled. Check with the help of a PC actuators (blocking the inclusion of transmission), wiring, contacts in the connectors. On transmissions of type ZF 16S 151 / ZF 16 S 181, check the solenoid valve block ( Y 307). Check the resistance between the contacts X 4/13 (+) and X3 / 5 (-): on the side of the FFR unit approximately 8.9 kΩ, on the side of the car approximately 135 Ohms.Check the resistance between the contacts X4 / 13 (+) and X 1/3 (-): on the side of the FFRblock approximately 8.3 kΩ, on the side of the car —. Check the voltage between pins X4 / 13 (+) and X3 / 5 (-): when the solenoid valve is activated at approximately 27.5 V., when the solenoid valve is deactivated at approximately 0 V. |
| 3010 | Limit speed and torque. | Priority 5: Indication during stop and while driving. The STOP warning light illuminates in yellow both when driving and when stopped or stopped. Incorrect signal from the resistor group ( R 134). The limitation stage for the speed range remains activated. When first turned on, stage 0 is activated for the engine speed range. Using a PC, check the accuracy of the signal, check the wiring, contacts in the connectors, check the X1996 body interface, check the group of resistors ( R 134). Check the resistance between the contacts X2 / 1 (+) and X1 / 3 (- ): on the side of the FFR blockapproximately 6.5 kΩ, on the side of the car approximately 0.511 Ohms. Check the resistance of the resistor group ( R 134): between pins 5 and 7/6 approximately 3.09 kΩ, between pins 5 and 3/4 approx. 1.37 kΩ, between contacts 5 and 2/8 approximately 0.51 kΩ, between contacts 5 and 1/9 is approximately 8.2 kΩ. Check the voltage between the contacts of the FFR unit : X2 / 1 (+) and X1 / 3 (-) of approximately 460 mV. |
| 3020 | Calibration value, accelerator pedal, PWM 1. | Priority 3. Display only when the vehicle is stationary, only an indication of a malfunction, an indication of the action for the error is not required. On a stationary vehicle, the STOPwarning light is yellow. The PWM 1 signal of the accelerator pedal (A410) is not set or not configured. The fault occurs when the idle is more than 10% or less than 30%, and the full load point is greater than 90% or less than 40%.This activates the engine speed limit and torque limit. The accelerator pedal value is calculated from the PWM 2 signal . Check the accuracy of the signal ( PWM 1 pedal module ) using a PC, and perform an accelerator pedal calibration.Pedal calibration is carried out using a PC. To calibrate, press the accelerator pedal to the end (the kick-down mode should be activated), hold the pedal pressed for about 3 seconds, then the pedal should be released, repeat these steps 2-3 times. When installing a new accelerator pedal, calibration is always required. |
| 3021 | Calibration value, accelerator pedal, PWM 2. | Priority 3. Display only when the vehicle is stationary, only an indication of a malfunction, an indication of the action for the error is not required. On a stationary vehicle, the STOPwarning light is yellow. The PWM 2 signal of the accelerator pedal (A410) is not set or not configured. A fault occurs when the idle is less than 10% or greater than 30%, and the full load point is greater than 90% or less than 40%. This activates the motor speed limit and torque limit.The accelerator pedal value is calculated from the PWM 1 signal . Check the accuracy of the signal ( PWM 2 pedal module ) using a PC, and perform an accelerator pedal calibration. Pedal calibration is carried out using a PC. To calibrate, press the accelerator pedal to the end (the kick-down mode should be activated), hold the pedal pressed for about 3 seconds, then the pedal should be released, repeat these steps 2-3 times. When installing a new accelerator pedal, calibration is always required. |
| 3197 | CAN data bus : AS – Tronicmessage ETC 1, byte1. | Priority 3. Display only when the vehicle is stationary, only an indication of a malfunction, an indication of the action for the error is not required. On a stationary vehicle, the STOPwarning light is yellow. Invalid shift signalprocess “or signal” driveline AS – Troniccontrol unit engaged (A330). The incoming signal is identified as invalid. Check the AS -Tronic gearbox control unit fault recorder and eliminate the causes of malfunctions, check the wiring, contacts in the connectors. Check the resistance of the CAN transmission data channel ( T – CAN ): on the contacts of the AS- Tronic A12 (-) and A8 (+) control unitapproximately 60 Ohms. Check the resistance of the data channel of the CAN transmission ( T- CAN ) on the contacts of the FFR X1 / 15 (-) and Х1 / 14 block (+) approximately 120 ohms.With a resistance of 0 ohms circuit C AN-High to CAN-Low. |
| 3250 | Comfort Shift inputs (CS1 and CS2). | Priority 5: Indication during stop and while driving. The STOP warning light illuminates in yellow both when driving and when stopped or stopped. The input value is not accurate when both Comfort inputs are input. Shift shift knob (S 477) have the same level for longer than 100ms. or after switching on the request remains outstanding for more than 2 seconds.Comfort function Shift is locked. Using a PC to check the accuracy of the signals ” ComfortSwitch Shift and Comfort switch Shift in reverse position. “Check resistance: requestComfort Shift 1, the FFR block between contacts X2 / 12 (+) and X1 / 3 (-) on the side of the FFR block is approximately 4.6 kΩ. Check resistance: request Comfort Shift 2, the FFRblock between pins X2 / 3 (+) and X1 / 3 (-) on the side of the FFR block is approximately 4.6 kΩ. Check Voltage: Request Comfort Shift 1,FFR block between contacts X2 / 12 (+) and X1 / 3 (-): the switch is open 0 V, the switch is closed by U CL.15 (equal to the voltage on terminal 15 of the ignition lock with the ignition on). Check Voltage: Request Comfort Shift 2,FFR block between contacts X2 / 3 (+) and X1 / 3 (-): the switch is open 0 V, the switch is closed by U CL.15 (equal to the voltage on terminal 15 of the ignition lock with the ignition on). |
| 3251 | FGR (speed control) switch /FGB (movement speed limit). | Priority 5: Indication during stop and while driving. The STOP warning light illuminates in yellow both when driving and when stopped or stopped. FGR / FGB switch malfunction . TheFGR system is deactivated. Check with PC the accuracy of the signal “Switch FGR CAT (Tempomat )”, check the wiring and contacts in the connectors, check the switch FGR / FGB (S 284). Check resistance: the switch is open, between the contacts of the FFR X2 / 16 (+) and X1 / 3 (-) block, the FFR block isdisconnected, approximately 4.6 kΩ. Check voltage: the switch is open, between the contacts of the FFR X2 / 16 (+) and X1 / 3 (-) block, the FFR block is disconnected 0 V. |
| 3269 | The accuracy of the signal from the terminal 50 ignition (engine start). | Priority 3. Display only when the vehicle is stationary, only an indication of a malfunction, an indication of the action for the error is not required. On a stationary vehicle, the STOP warning light is yellow. The engine start signal from the ignition lock ( Q 101) is considered incorrect when the ignition signal is given when the ignition is turned on. After the following activation procedure, a start is possible if a positive signal is detected during the engine start process. Using a PC, check the accuracy of the signal “terminal 50”, “External request to stop the engine”, “External request to start the engine”, check the wiring, contacts in the connectors, the ignition switch ( Q 101), the external device for starting and stop the engine. Check the resistance between the pins of the FFR X3 / 7 (+) and X1 / 3 (-) connectors on the FFR side of approximately 4.6 kΩ. Check the voltage between the contacts X3 / 7 (+) and X1 / 3 (-): the switch is open 0 V., the switch is closed from 16 to 32 V ( U baht battery voltage). |
| 3311 | Control unit (calibration amount EEPROM ). | Priority 1: The engine must be stopped. The STOP warning light flashes red with the STOP symbol . If the malfunction is detected by the driver, the FFR unit (A403) needs to be replaced. If a malfunction occurs after a programming process ( for example, a key, a clutch, or an accelerator pedal) or after replacing the FFR unit , a second change of parameters is required. If a The FFR unit has been replaced due to this fault. The following is required: before connecting the PC, remove the faulty FFR block , after connecting the PC using the menu item “From the service computer through the network connection at the enterprise” to prepare the data required to replace the FFR block , under no circumstances Do not read the data from the faulty FFR unit , it is possible to transfer DTC 3311 to a new unit . |
| 3449 | Backpressure exhaust. | Priority 2: Fault requiring elimination at a service center. The STOP warning light is permanently red. A fault is recorded if, within a specified time, the exhaust backpressure exceeds a threshold value and the engine brake is not active. The EVB module (motor brake valve Y 355) is deactivated. When using a PC to verify the accuracy of the signal “exhaust backpressure”, check the wiring, contacts in the connector module EVB . Check resistance: 5 V. supply, FFR block between contacts X2 / 5 (+) and X1 / 3 (-) on the side of the FFR blockapproximately 100 kΩ, on the side of the car approximately 3.7 kΩ. Check resistance: exhaust backpressure signal, FFR block between contacts X3 / 4 (+) and X1 / 3 (- ) on the side of the FFR unit approximately 100 kΩ, on the side of the car approximately 12.2 kΩ. Check resistance: ground, FFR block between contacts X3 / 5 (+) and X1 / 3 (-) on the side of the FFR block approximately 1.9 kΩ, on the side of the car approximately 54 kΩ. Check resistance: engine brake FFR block between contacts X4 / 14 (+) and X1 / 3 (-) on the side of the FFR block approximately 8.82 kΩ, on the side of the car approximately 22 Ohms. Check voltage: power 5 V., block The FFR between the X2 / 5 (+) and X 1/3 (-) contacts is approximately 5 V. Check the voltage: the exhaust backpressure signal, the FFR block between the X3 / 4 (+) and X1 / 3 (-) contacts is approximately 560 mV. Check voltage: ground, FFR block between contacts X3 / 5 (+) and X1 / 3 (-) 0V. Check Voltage: engine brake unit FRR between the contacts X4 / 14 (+) and X1 / 3 (-) module EVB activated — module EVB not been activated 0 V. Checking voltage: unit FFR between the contacts X4 / 1 (+) and X3 / 5 (-) solenoid valve is activated approximately 27.6 V, with a simple HIGH signal every 6 seconds, the solenoid valve is deactivated 0 V. |
| 3450 | Backpressure exhaust. | Priority 2: Fault requiring elimination at a service center. The STOP warning light is permanently red. A fault is recorded if, within a specified time, the exhaust backpressure exceeds a threshold value and the engine brake is not active. The EVB module (motor brake valve Y 355) is deactivated. When using a PC to verify the accuracy of the signal “exhaust backpressure”, check the wiring, contacts in the connector module EVB . Check resistance: 5 V. supply, FFR block between contacts X2 / 5 (+) and X1 / 3 (-) on the side of the FFR block approximately 100 kΩ, on the side car approximately 3.7 kΩ. Check resistance: exhaust backpressure signal, FFR block between contacts X3 / 4 (+) and X1 / 3 (- ) on the side of the FFR unit approximately 100 kΩ, on the side of the car approximately 12.2 kΩ. Check resistance: ground, FFR block between contacts X3 / 5 (+) and X1 / 3 (-) on the side of the FFR block approximately 1.9 kΩ, on the side of the car approximately 54 kΩ. Check resistance: engine brake FFR block between contacts X4 / 14 (+) and X1 / 3 (-) on the side of the FFR block approximately 8.82 kΩ, on the side of the car approximately 22 Ohms. Check voltage: 5 V. supply, FFR unit between contacts X2 / 5 (+) and X 1/3 (-) approximately 5 V. Check the voltage: the exhaust backpressure signal, the FFR block between contacts X3 / 4 (+) and X1 / 3 (-) approximately 560 mV. Check voltage: ground, FFR block between contacts X3 / 5 (+) and X1 / 3 (-) 0V. Check Voltage: engine brake unit FRR between the contacts X4 / 14 (+) and X1 / 3 (-) module EVB activated — module EVB not been activated 0 V. Checking voltage: unit FFR between the contacts X4 / 1 (+) and X3 / 5 (-) solenoid valve is activated approximately 27.6 V, with a simple HIGH signal every 6 seconds, the solenoid valve is deactivated 0 V. |
| 3451 | “Comfort-Shift” is not functioning. | Priority 5: Indication during stop and while driving. The STOP warning light illuminates in yellow both when driving and when stopped or stopped. The ” Comfort – Shift ” function is disabled. Using a PC, check the accuracy of the signal ” Comfort – Shift switch ” and ” Comfort – Shift switch in reverse position”, check the wiring, contacts in the connectors, check the gearshift control lever switch ( S 477). Check resistance: request Comfort – Shift 1, FFR block – between contacts X2 / 12 (+) and X1 / 3 (-) on the side of the block FFR is approximately 4.6 kΩ. Check resistance: request Comfort – Shift 2, FFR block – between contacts X2 / 3 (+) and X1 / 3 (-) on the side of the FFR block approximately 4.6 kΩ. Check voltage: request Comfort – Shift 1, FFR block – between contacts X2 / 12 (+) and X1 / 3 (-) switch open 0V., Switch closed U kl15 (voltage from ignition lock). Check voltage: request Comfort – Shift 2, FFR block – between contacts X2 / 3 (+) and X1 / 3 (-) the switch is open 0V, the switch is closed U CL15 (voltage from the ignition lock). |
| 3452 | Squeeze the clutch. | Priority 5: Indication during stop and while driving. The STOP warning light illuminates in yellow both when driving and when stopped or stopped. The clutch is not pressed enough or the ” Comfort – Shift ” switch is not correctly engaged . It is required to keep the clutch pressed until the switching procedure is completed. |
| 3510 | Clutch overload | Priority 5: Indication during stop and while driving. The STOP warning light illuminates in yellow both when driving and when stopped or stopped. The FFR unit has registered clutch slip. Torque is reduced by 80%. After the specified time required for cooling the clutch, the maximum torque is released. |
| 3520 | LSS1 timeout. | Priority 5: Indication during stop and while driving. The STOP warning light illuminates in yellow both when driving and when stopped or stopped. The retarder / gearbox switch (A942) does not respond to the steering column. Using a PC, check the accuracy of the signal from the switch ( A 942), check the wiring, contacts in the connectors, check the switch (A942), check the fuse F 583. Check the resistance of the signal wire between the contact of the FFR X2 / 8 unit and contact 2 of the switch on the steering column: approximately 0.2 ohms. Check the voltage on the switch, the power supply of the LIN bus between pins 3 (+) and 1 (-) U baht (battery voltage). |
| 3521 | Timeout MFL1. | Priority 5: Indication during stop and while driving. The STOP warning light illuminates in yellow both when driving and when stopped or stopped. No response from the MFL multifunction steering wheel (A943 ) .When using a PC, check the accuracy of the signals from the MFL multifunction steering wheel (A943) ( Set -, Set +, Off, Memo , FGR / FGB ), check the wiring, contacts in the connectors, check steering wheel, check fuse F 583. Check the resistance of the LIN bus signal wire between terminal X2 / 8 of the FFR unit and pin 3 on the steering wheel: approximately 0.2 ohms. Check the LIN bus power supply on pins 1 (+) and 2 (-): U bat. ( Battery voltage). With the help of a PC, it is possible to check only the right side of the steering wheel. |
| 3522 | Timeout INST1. | Priority 5: Indication during stop and while driving. The STOP warning light illuminates in yellow both when driving and when stopped or stopped. No response from the dashboard (A407). Check wiring, contacts in connectors, check dashboard (A407). Check the resistance of the LIN bus signal wire between terminal X2 / 8 of the FFR unit and terminal X1 / 15 of the dashboard: approximately 0.2 ohms. |
| 3524 | The right side of the MFL is faulty. | Priority 5: Indication during stop and while driving. The STOP warning light illuminates in yellow both when driving and when stopped or stopped. The right side of the MFL steering wheel is faulty. This fault is detected by the MFL and the MFL 1 message is transmitted to the FFR unit . Using a PC, check the accuracy of the signals from the multifunction steering wheel MFL (А943) ( Set -, Set +, Off, Memo , FGR / FGB ), check the wiring, contacts in the connectors , check the steering wheel, check the fuse F 583. Check the resistance of the LIN bus signal wire between terminal X2 / 8 of the FFR unit and terminal 3 of the steering wheel: approximately 0.2 ohms. Check the LIN bus power supply on pins 1 (+) and 2 (-): U bat. ( Battery voltage). With the help of a PC, it is possible to check only the right side of the steering wheel. |
| 3525 | Left / right side of MFL is out of order. | Priority 5: Indication during stop and while driving. The STOP warning light illuminates in yellow both when driving and when stopped or stopped. The left / right side of the MFL steering wheel is faulty. This fault is detected by the MFL and the MFL 1 message is transmitted to the FFR unit . Using a PC, check the accuracy of the signals from the multifunction steering wheel MFL (А943) ( Set -, Set +, Off, Memo , FGR / FGB ), check the wiring, contacts in the connectors , check the steering wheel, check the fuse F 583. Check the resistance of the LIN bus signal wire between terminal X2 / 8 of the FFR unit and terminal 3 of the steering wheel: approximately 0.2 ohms. Check the LIN bus power supply on pins 1 (+) and 2 (-): U bat. ( Battery voltage). With the help of a PC, it is possible to check only the right side of the steering wheel. |
| 3526 | Malfunction LSS. | Priority 5: Indication during stop and while driving. The STOP warning light illuminates in yellow both when driving and when stopped or stopped. The retarder / gearbox switch (A942) not the steering column is faulty. Using a PC, check the accuracy of the signal from the switch ( A 942), check the wiring, contacts in the connectors, check the switch (A942), check the fuse F 583. Check the resistance of the signal wire between the contact of the FFR X2 / 8 unit and contact 2 of the switch on the steering column: approximately 0.2 ohms. Check the voltage on the switch, the power supply of the LIN bus between pins 3 (+) and 1 (-) U baht (battery voltage). |
| 3527 | LIN bus closure. | Priority 5: Indication during stop and while driving. The STOP warning light illuminates in yellow both when driving and when stopped or stopped. A fault is recorded when the LIN bus wire is shorted to ground or to battery voltage. A fault is recorded if the closure is recorded for more than 10 seconds. Check the LIN bus signal wire for short circuits, check the contacts in the connectors. Check the resistance of the LIN bus signal wire between terminal X2 / 8 of the FFR unit and terminal 2 of the switch on the steering column of the retarder / gearbox: approximately 0.2 ohms. Check the resistance of the LIN bus signal wire between contact X2 / 8 of the FFR unit and contact 3 of the multifunction steering wheel MFL : approximately 0.2 Ohm. Check the resistance of the LIN bus signal wire between terminal X2 / 8 of the FFR unit and terminal X1 / 15 of the dashboard: approximately 0.2 V. |
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