Diagnostic Procedure

CHECK ENGINE LIGHT ILLUMINATES (VINs 7, L, M) DIAGNOSTIC PROCEDURE

Step	Inspection	Results	Action
1	VERIFY PCM DTC Perform the DTC inspection for the PCM. (See DTC INSPECTION .) Are any DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [PCM (VINs 7, L, M) (US)] .)
1		No	Go to the next step.
2	INSPECT PCM CAN COMMUNICATION LINE FOR SHORT AND OPEN CIRCUIT Inspect the applicable circuit for short and open circuit. (See CIRCUIT INSPECTION .) Is the circuit normal?	Yes	Go to the next step.
2		No	Repair or replace the malfunctioning location and perform the repair completion verification.
3	INSPECT INSTRUMENT CLUSTER CAN COMMUNICATION LINE FOR SHORT AND OPEN CIRCUIT Inspect the applicable circuit for short and open circuit. (See CIRCUIT INSPECTION .) Is the circuit normal?	Yes	Go to the next step.
3		No	Repair or replace the malfunctioning location and perform the repair completion verification.
4	INSPECT CLIMATE CONTROL UNIT CAN COMMUNICATION LINE FOR SHORT AND OPEN CIRCUIT Inspect the applicable circuit for short and open circuit. (See CIRCUIT INSPECTION .) Is the circuit normal?	Yes	Go to the next step.
4		No	Repair or replace the malfunctioning location and perform the repair completion verification.
5	INSPECT INSTRUMENT CLUSTER FOR MALFUNCTION Inspect the applicable part. (See INSTRUMENT CLUSTER INSPECTION (US) .) Is the part normal?	Yes	Go to the next step.
5		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION .)
Repair completion verification 1	VERIFY THAT VEHICLE IS REPAIRED Install/connect the part removed/disconnected during the troubleshooting procedure. Has the malfunction symptom been eliminated?	Yes	Complete the symptom troubleshooting. (Explain contents of repair to customer)
Repair completion verification 1		No	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW (US) .) If the CAN communication is normal, perform the diagnosis from Step 1. If the malfunction recurs, go to the next step.
Repair completion verification 2	VERIFY IF MALFUNCTION IS CAUSED BY NOT PERFORMING PCM REPROGRAMMING Verify repair information and verify that there is a new calibration in the PCM. Is there a new calibration in the PCM?	Yes	Perform the PCM reprogramming and verify if the malfunction symptom was corrected. If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [(VIN M)] .) (See PCM REMOVAL/INSTALLATION [(VIN 7 & VIN L)] .)
Repair completion verification 2		No	Replace the PCM. (See PCM REMOVAL/INSTALLATION [(VIN M)] .) (See PCM REMOVAL/INSTALLATION [(VIN 7 & VIN L)] .)