Diagnostic procedure

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

DIAGNOSTIC PROCEDURE CHART

STEP	INSPECTION	RESULTS	ACTION
1	VERIFY IF THERE IS DRIVEABILITY MALFUNCTION OR EXHAUST GAS MALFUNCTION Are any drivability or exhaust smoke concerns present?	Yes	Go to the appropriate symptom troubleshooting.
1		No	Go to the next step.
2	INSPECT RELATED PART CONDITION Inspect the following: Electrical connections Vacuum lines Fuel quality Are all items normal?	Yes	Go to the next step.
2		No	Repair or replace the malfunctioning part according to the inspection results. Repeat Step 2.
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 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.
4		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 .)
5	DETERMINE IF MALFUNCTION CAUSE IS CHARCOAL CANISTER OR FUEL TANK VENT SYSTEM Inspect the charcoal canister for fuel saturation. Is an excess amount of liquid fuel present in the canister?	Yes	Replace the charcoal canister. (See CHARCOAL CANISTER, CANISTER VENT (CV) SOLENOID VALVE, AIR FILTER COMPONENT REMOVAL/INSTALLATION .)
5		No	Inspect the fuel tank vent system. Repair or replace the malfunctioning part according to the inspection results. If the fuel tank vent system is normal, suggest trying a different brand since the sulfur content can vary in different fuels.
6	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.