Group 36 Vehicle Control Unit, Fault Tracing MID 144 PID 191 Output Shaft Speed MID 144 PPID 3 Starter relay Output MID 144 PPID 60 Idle Switch, Power MID 144 PPID 61 Engine Brake Switch 9 Type of fault: FMI Description: Fault Condition: Possible Symptoms: Possible Cause: FMI 5 • Abnormally low current or open circuit • Lower current then expected • N/A • Faulty vehicle speed sensor (VSS) • Wiring harness FMI 6 • Abnormally high current or short circuit to ground • Higher current then expected • N/A • Faulty vehicle speed sensor (VSS) • Wiring harness Type of fault: FMI Description: Fault Condition: Possible Symptoms: Possible Cause:
FMI 4 • Abnormally low voltage or short circuit to lower voltage • Output not activated, key not in starter motor position • Red lamp Lit and speaker signal sounds • Starter motor doesn’t activate when requested • Wiring harness • Starter circuit relay Type of fault: FMI Description: Fault Condition: Possible Symptoms: Possible Cause: FMI 4 • Abnormally low voltage or short circuit to lower voltage • Lower voltage then expected • N/A • Wiring harness • VECU Type of fault: FMI Description: Fault Condition: Possible Symptoms: Possible Cause:
FMI 7 • Incorrect response from a mechanical system • SET+ and SET- signal received at the same time • Yellow Check lamp lit • Engine retarder brake will not activate • Engine retarder switch harness • Engine retarder switch