68 RENR5042-02 Troubleshooting Section i02259267 CID 0172 FMI 04 Intake Manifold Air Temp short to ground Troubleshooting: Perform the following diagnostic procedure: “Engine Temperature Sensor Open or Short Circuit - Test” Results: SMCS Code: 1921-038 OK STOP. Conditions Which Generate This Code: i02259293 CID 0174 FMI 04 Fuel Temperature short to ground The signal voltage from the intake manifold air temperature sensor is less than 0.2 VDC for more than eight seconds. System Response: SMCS Code: 1922-038 The Electronic Control Module (ECM) will log the diagnostic code. The ECM will flag the intake manifold air temperature as invalid data and a default value of 40 °C (104 °F) is used.
Conditions Which Generate This Code: The signal voltage from the fuel temperature sensor is below 0.2 VDC for eight seconds. Possible Performance Effect: System Response: None The Electronic Control Module (ECM) will log the diagnostic code. The ECM flags engine coolant temperature as invalid data and a default value of 50 °C (122 °F) is used. Troubleshooting: Perform the following diagnostic procedure: “Engine Temperature Sensor Open or Short Circuit - Test” Possible Performance Effect: Results: Low power OK STOP. Troubleshooting: Perform the following diagnostic procedure:
“Engine Temperature Sensor Open or Short Circuit - Test” i02259280 CID 0174 FMI 03 Fuel Temperature open/short to +batt Results: OK STOP. SMCS Code: 1922-038 Conditions Which Generate This Code: i02259324 CID 0190 FMI 08 Engine Speed abnormal The engine coolant temperature is above °C (14 °F). The signal voltage from the fuel temperature sensor is above 4.95 VDC for eight seconds. SMCS Code: 1907-038 Conditions Which Generate This Code: System Response: The engine speed is greater than 120 rpm. The pattern for the timing ring is incorrect for five seconds. The Electronic Control Module (ECM) will log the diagnostic code.
The ECM flags engine coolant temperature as invalid data and a default value of 50 °C (122 °F) is used. System Response: Possible Performance Effect: The Electronic Control Module (ECM) will log the diagnostic code. If a valid signal is not received from the primary engine speed/timing sensor, the ECM will default to the secondary engine speed/timing sensor. Low power