Diagnostic Test
- CHECK FOR ACTIVE DTC
- With the scan tool, read the active DTCs.
- Cycle the ignition switch from off to on, leaving the ignition on for a minimum of 90 seconds.
- With the scan tool, read the active DTCs.
Does the scan tool display this DTC as active?
Yes
- Go to step 2
No
- If the DTC is stored, check for an intermittent condition. Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.
- Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
- A/C PRESSURE TRANSDUCER
- Turn the ignition off.
- Disconnect the A/C Pressure Transducer harness connector.
- Cycle the ignition switch from off to on, leaving the ignition on for a minimum of 90 seconds.
- With the scan tool, read the active DTCs.
Does the scan tool display this DTC as active?
Yes
- Go to step 3
No
- Replace the A/C Pressure Transducer in accordance with the Service Information.
- Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
- SHIFT MOTOR/MODE SENSOR ASSEMBLY
- Turn the ignition off.
- Disconnect the Shift Motor/Mode Sensor Assembly harness connector.
- Cycle the ignition switch from off to on, leaving the ignition on for a minimum of 90 seconds.
- With the scan tool, read the active DTCs.
Does the scan tool display this DTC as active?
Yes
- Go to step 4
No
- Replace the Shift Motor/Mode Sensor Assembly in accordance with the Service Information.
- Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
- (T103) 5-VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE
- Turn the ignition off.
- Disconnect the FCM C1 harness connector.
- Turn the ignition on.
- Measure the voltage of the (T103) 5-volt Supply circuit.
Is the voltage above 5.5 volts?
Yes
- Repair the (T103) 5-volt Supply circuit for a short to voltage.
- Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure
No
- Inspect the wiring and connectors for damage or shorted circuits. If ok, replace and program the Front Control Module (FCM) in accordance with the Service Information.
- Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure