Diagnostic procedure

WARNING: This page is about a different variant/trim than selected.

DIAGNOSTIC PROCEDURE CHART

STEP	INSPECTION	RESULTS	ACTION
1	INSPECT COOLING SYSTEM FOR MALFUNCTION Access the PCM PID ECT using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST .) Verify the ECT PID is less than 116 °C {241 °F} during driving. Is the ECT PID less than the specification?	Yes	Go to the next step.
1		No	Inspect the cooling system for the cause of the overheating. Repair or replace the malfunctioning part according to the inspection results.
2	INSPECT IAT SENSOR AND MAF SENSOR SIGNALS CAUTION: While performing this step, always operate the vehicle in a safe and lawful manner. When the M-MDS is used to observe monitor system status while driving, be sure to have another technician with you, or record the data in the M-MDS using the PID/DATA MONITOR AND RECORD capturing function and inspect later. Access and monitor the PCM PIDs IAT and MAF using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST .) Are the PIDs normal? (See PCM INSPECTION .)	Yes	Go to the next step.
2		No	IAT PID is not specified: Inspect the IAT sensor (See INTAKE AIR TEMPERATURE (IAT) SENSOR INSPECTION .) MAF PID is not specified: Inspect the MAF sensor (See MASS AIR FLOW (MAF) SENSOR INSPECTION .) Repair or replace the malfunctioning part according to the inspection results.
3	VERIFY PCM DTC Retrieve any DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST .) Are there any DTCs displayed?	Yes	Go to the appropriate DTC inspection. (See DTC TABLE .)
3		No	Go to the next step.
4	INSPECT CMP SENSOR INSTALLATION Inspect the CMP sensor installation. Is the CMP sensor installed properly?	Yes	Go to the next step.
4		No	install the CMP sensor properly. (See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION .)
5	INSPECT CKP SENSOR AND PULSE WHEEL Inspect the CKP sensor and crankshaft pulley installation. Are CKP sensor and crankshaft pulley installed properly?	Yes	Go to the next step.
5		No	install the CKP sensor and/or crankshaft pulley properly. (See CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATION .)
6	INSPECT ENGINE COMPRESSION Is the engine compression correct? (See COMPRESSION INSPECTION .)	Yes	Go to the next step.
6		No	Inspect for cause. Repair or replace the malfunctioning part according to the inspection results.
7	INSPECT FUEL LINE PRESSURE Inspect the fuel line pressure. (See FUEL LINE PRESSURE INSPECTOR .) Is the fuel line pressure correct?	Yes	Go to the next step.
7		No	Zero or low: Inspect the following: Fuel pump relay Fuel pump circuit Fuel line for clogging If there is no malfunction, replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION .) High: Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION .)
8	INSPECT KS Inspect the KS. (See KNOCK SENSOR (KS) INSPECTION .) Is the KS normal?	Yes	Go to the next step.
8		No	Replace the KS. (See KNOCK SENSOR (KS) REMOVAL/INSTALLATION .)
9	INSPECT IGNITION TIMING Inspect the ignition timing. (See ENGINE TUNE-UP .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
9		No	Replace the fuel.
10	Verify test results. If normal, return to diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX .) If malfunction remains, inspect related Service Bulletins and/or On-line Repair Information and perform repair or diagnosis. If vehicle is repaired, troubleshooting completed. If vehicle is not repaired or additional diagnostic information is not available, reprogram the PCM if a later calibration is available. Retest.