132 RENR5042-02 Troubleshooting Section Verify that the repair eliminates the problem. Note: Wait at least 15 seconds in order for the diagnostic codes to become active. STOP. Test Step 2. Check the Supply Voltage at the Sensor Connector D. Determine if the problem is related to an open circuit diagnostic code 03 or a short circuit diagnostic code 04. A. Turn the keyswitch to the OFF position. Expected Result: B. Disconnect all of the following analog sensors at the sensor connector: No diagnostic codes are active. Results: Engine oil pressure sensor OK – No diagnostic codes are active. Boost pressure sensor Repair: The problem may have been related to a faulty connection in the harness.
Carefully reinspect the connectors and wiring. Refer to Troubleshooting, “Electrical Connectors - Inspect”. Atmospheric pressure sensor Fuel pressure sensor C. Turn the keyswitch to the ON position. STOP. D. Measure the voltage between terminal A (5 V analog supply) and terminal B (sensor return) at the sensor connectors. Not OK A short circuit diagnostic code (04) is active at this time. Proceed to Test Step 4. E. Turn the keyswitch to the OFF position. Not OK – An open circuit diagnostic code (03) is active at this time. Proceed to Test Step 5. F. Reconnect all of the sensors. Test Step 4. Disconnect the Suspect Sensor in Order to Create an Open Circuit Expected Result: A.
Turn the keyswitch to the OFF position. The voltage is 5.0 ± 0.16 VDC. B. Disconnect the sensor connector of the sensor with the short circuit diagnostic code (04). Results: OK – The voltage is 5.0 ± 0.16 VDC. The voltage is correct. Proceed to Test Step 3. C. Turn the keyswitch to the ON position. Wait at least 15 seconds for activation of the diagnostic codes. Not OK – The voltage is not 5.0 ± 0.16 VDC. The voltage is incorrect. D. Access the “Active Diagnostic Code” screen on the electronic service tool. Check for an active open circuit diagnostic code (03). Repair: Perform the diagnostic functional test Troubleshooting, “5 Volt Engine Pressure Sensor Supply Circuit - Test”. E.
Turn the keyswitch to the OFF position. STOP. Expected Result: Test Step 3. Check for Active Diagnostic Codes An open circuit diagnostic code 03 is now active for the disconnected sensor. A. Connect the electronic service tool to the service tool connector. Results: OK A short circuit diagnostic code (04) was active before disconnecting the sensor. An open circuit diagnostic code (03) became active after disconnecting the sensor. B. Turn the keyswitch to the ON position. C. Monitor the active diagnostic code screen on the electronic service tool. Check and record any active diagnostic codes.