Group 36 Vehicle Control Unit, Fault Tracing MID 144 SID 250 SAE J1587 Data Link MID 144 SID 253 Calibration Memory EEPROM MID 144 PSID 1 Retarder Control Set Switch MID 144 PSID 2 Idle Validation Switch 2 14 Type of fault: FMI Description: Fault Condition: Possible Symptoms: Possible Cause: FMI 2 • Intermittent or incorrect data • Faulty messages on the link received • Some function disturbances may occur • SAE J1587 data link down/shorted Type of fault: FMI Description: Fault Condition: Possible Symptoms: Possible Cause:
FMI 2 • Intermittent or incorrect data • Datasets have incorrect checksum • Yellow Check lamp lit • Some functions may be deactivated • Faulty EEPROM • VECU FMI 14 • Special instructions • Incorrect data found in datasets • Error when programming • Yellow Check lamp lit • Some functions may be deactivated • Faulty EEPROM • VECU Type of fault: FMI Description: Fault Condition: Possible Symptoms: Possible Cause: FMI 7 • Incorrect response from a mechanical system • Signals SET+ and SET- received at the same time • Yellow Check lamp lit • Retarder Control deactivated • Faulty harness • Connector Type of fault: FMI Description: Fault Condition: Possible Symptoms: Possible Cause:
FMI 7 • Incorrect response from a mechanical system • Faulty readout from IVS2 • Yellow Check lamp lit • Engine will not supply requested fuel to engine • Idle Validation Switch (IVS) • IVS connector • IVS harness