RENR5042-02 67 Troubleshooting Section Troubleshooting: The engine is running and battery voltage drops below 9 VDC for at least 0.06 seconds before the battery voltage recovers. Perform the following diagnostic procedure: “Electrical Power Supply Circuit - Test” The engine is running and the battery voltage drops below 9 VDC three times in the last seven seconds. Results: OK STOP. System Response: i02281080 CID 0168 FMI 01 System Voltage Low The ECM will log the diagnostic code. Possible Performance Effect: SMCS Code: 1401-038 Engine misfires Conditions Which Generate This Code: Engine shutdown The Electronic Control Module (ECM) has been powered for at least three seconds.
The ECM detects the following condition: Troubleshooting: Perform the following diagnostic procedure: “Electrical Power Supply Circuit - Test” For 12 volt systems, the ECM reads battery voltage that is below 9 VDC. Results: For 24 volt systems, the ECM reads battery voltage that is below 18 VDC. OK STOP. i02258949 CID 0172 FMI 03 Intake Manifold Air Temp open/short to +batt System Response: The ECM will log the diagnostic code. Possible Performance Effect: Engine misfires SMCS Code: 1921-038 Engine shutdown Conditions Which Generate This Code: Troubleshooting: The engine coolant temperature is above °C (14 °F).
The signal voltage from the intake manifold air temperature sensor is greater than 4.95 VDC for more than eight seconds. Perform the following diagnostic procedure: “Electrical Power Supply Circuit - Test” Results: System Response: OK STOP. The Electronic Control Module (ECM) will log the diagnostic code. The ECM flags engine coolant temperature as invalid data and a default value of 40 °C (104 °F) is used. i01942656 CID 0168 FMI 02 System Voltage intermittent/erratic Possible Performance Effect: None SMCS Code: 1401-038 Troubleshooting: Conditions Which Generate This Code: Perform the following diagnostic procedure:
“Engine Temperature Sensor Open or Short Circuit - Test” The Electronic Control Module (ECM) detects one of the following conditions: Results: OK STOP.