Diagnostic procedure

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

DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	Inspect for following: Vacuum lines for leakage or blockage Electrical connections Proper maintenance schedule followed Intake-air system and air cleaner element concerns: obstructions, leakage or dirtiness Are all items normal?	Yes	Go to the next step.
1		No	Service if necessary. Repeat Step 1.
2	Connect WDS or equivalent to DLC-2. Turn ignition switch to ON position (Engine off). Retrieve any DTCs. Are there any DTCs displayed?	Yes	DTC is displayed: Go to appropriate DTC test.
2		No	No DTC is displayed: Go to the next step.
3	Is any other driveability concern present?	Yes	Go to appropriate symptom troubleshooting.
3	Is any other driveability concern present?	No	Go to the next step.
4	Connect WDS or equivalent to DLC-2. Access ECT PID. Warm up engine and idle it. Verify ECT PID is correct. (See PCM INSPECTION ). Is ECT PID correct?	Yes	Go to the next step.
4		No	Inspect for coolant leakage, cooling fan and condenser fan operation or thermostat operation.
5	Perform Spark Test. (See SPARK TEST ). Is the strong blue spark visible at each cylinder?	Yes	Inspect for the following: Spark plugs malfunction Improperly installed CMP sensor Damage of trigger wheel on camshaft Open or short circuit on CMP sensor Open or short circuit between CMP sensor and PCM terminal 2S or 2AM Open or short circuit between CMP sensor and GND Repair or replace malfunctioning parts. If okay, go to the next step.
5		No	Inspect suspect ignition coil and connector.
6	Install fuel pressure gauge between fuel pipe and fuel distributor. Start engine and idle it. Measure fuel line pressure during idle. Is fuel line pressure correct during idle? (See FUEL LINE PRESSURE INSPECTION ).	Yes	Go to the next step.
6		No	Zero or low: Inspect for clogged fuel line. If okay, replace fuel pump unit. High: Replace fuel pump unit.
7	Remove and shake PCV valve. Does PCV valve rattle?	Yes	Go to the next step.
7	Remove and shake PCV valve. Does PCV valve rattle?	No	Replace PCV valve.
8	Inspect for fuel saturation inside charcoal canister. Is excess amount of liquid fuel present in canister?	Yes	Replace charcoal canister.
8		No	Inspect fuel tank vent system. Then, go to the next step.
9	Is there restriction in exhaust system?	Yes	Inspect exhaust system.
9	Is there restriction in exhaust system?	No	Go to the next step.
10	Inspect three-way catalytic converter. Is three-way catalytic converter normal?	Yes	Inspect EGR system. (See EGR CONTROL SYSTEM INSPECTION ).
10		No	Replace three-way catalytic converter.
11	Verify test results. If okay, return to diagnostic index to service any additional symptoms. 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 PCM if later calibration is available. Retest.