Pinpoint Test I : The Temperature Gauge Is Inoperative

I1 RETRIEVE THE RECORDED DTCS FROM THE PCM (POWERTRAIN CONTROL MODULE) SELF-TEST
- Ignition ON.
- Using a diagnostic scan tool, perform the PCM self-test.
Are any Diagnostic Trouble Codes (DTCs) recorded?

Yes Refer to the appropriate article for the procedure.

No GO to I2

I2 PERFORM THE IPC (INSTRUMENT PANEL CLUSTER) SELF-TEST
- Using a diagnostic scan tool, perform the IPC self-test.
- Check for recorded Diagnostic Trouble Codes (DTCs) from the IPC self-test.
Are any Diagnostic Trouble Codes (DTCs) recorded?

Yes REFER to DTC Chart: IPC .

No GO to I3

I3 CHECK THE GWM (GATEWAY MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)
- Using a diagnostic scan tool, check the GWM Continuous Memory Diagnostic Trouble Codes (CMDTCs).
Are any Diagnostic Trouble Codes (DTCs) recorded?

Yes REFER to: MODULE COMMUNICATIONS NETWORK .

No GO to I4

I4 PERFORM THE TEMPERATURE GAUGE ACTIVE COMMAND USING THE DIAGNOSTIC SCAN TOOL

Using a diagnostic scan tool, view the IPC Parameter Identifications (PIDs).

Select the IPC temperature gauge (ENGCOOLNT) PID.

NOTE: Make sure to set the diagnostic scan tool to 0 or full cold before beginning this step.

Command the temperature gauge on and off while monitoring the temperature gauge.

Does the temperature gauge start at cold (C), move to full hot (H) and return to cold (C)?

Yes	INSTALL a new GWM. REFER to: Gateway Module A (GWM) . CLEAR the Diagnostic Trouble Codes (DTCs). REPEAT the self-test. If the temperature gauge is still inoperative, INSTALL a new PCM. Refer to the appropriate article for the procedure.

No	INSTALL a new IPC. REFER to: Instrument Panel Cluster (IPC) .