Diagnostic procedure

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

DIAGNOSTIC PROCEDURE

STEP	INSPECTION	RESULTS	ACTION
1	Inspect air suction in intake-air system components while racing engine to higher speed. Is any air suction?	Yes	Repair or replace as necessary.
1		No	Go to the next step.
2	Perform the self-test function using the WDS or equivalent. Turn the ignition switch to the ON position. Retrieve any DTCs. Is a DTC displayed?	Yes	DTC is displayed: Go to the appropriate DTC test.
2		No	No DTC is displayed: Go to the next step.
3	Access the ECT PID. Start and warm-up engine to normal operating temperature. Is the ECT PID reading below 82°C {180°F}?	Yes	Go to the next step.
3		No	Go to symptom troubleshooting "NO.18 COOLING SYSTEM CONCERNS, RUNS COLD". (See NO. 18 COOLING SYSTEM CONCERNS-RUNS COLD ).
4	Verify the cooling fan operation. Does the cooling fan operate properly according ECT PID value?	Yes	Go to the next step.
4		No	Perform the Cooling Fan Control System Operation Inspection. (See COOLING FAN CONTROL SYSTEM INSPECTION ).
5	Inspect CMP arid CKP sensor for the following; Installation condition (See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION ). (See CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATION ). Damaged trigger wheel and camshaft Open or short circuit in the wiring harnesses. Is there any malfunction detected?	Yes	Repair or replace the/malfunctioning part according inspection results.
5		No	Go to the next step.
6	Access and monitor following the PIDs using the data monitor function. ECT APP MAF CPP (PCM terminal 1H) PNP (PCM terminal 1W) PSP (PCM terminal 1Z) Do the PIDs indicate the correct values under, trouble condition? (See USING THE WDS OR EQUIVALENT ).	Yes	Go to the next step.
6		No	Inspect and repair or replace suspected parts and the related harnesses. If the malfunction remains, perform the intermittent concern troubleshooting procedure. (See INTERMITTENT CONCERN TROUBLESHOOTING ).
7	Access and monitor the FUEL_PRES PID. Is the FUEL_PRES PID value within the specification? (See USING THE WDS OR EQUIVALENT ).	Yes	Go to Step 11.
7		No	Go to the next step.
8	Is the vehicle accelerate performance normally?	Yes	Go to the next step.
8	Is the vehicle accelerate performance normally?	No	Go to Step 10.
9	Inspect the fuel pressure sensor. (See FUEL PRESSURE SENSOR INSPECTION ). Is the fuel pressure sensor normal?	Yes	Go to Step 11.
9		No	Replace the delivery pipe.
10	Replace the high pressure fuel pump. Monitor FUEL_PRES PID. Is the FUEL_PRES PID value within the specified? (See USING THE WDS OR EQUIVALENT ).	Yes	Troubleshooting is completed. Go to Step 13.
10		No	Go to the next step.
11	Inspect the fuel injector for each cylinder. (See FUEL INJECTOR INSPECTION ). Are fuel injectors normal?	Yes	Go to the next step.
11		No	Replace the suspected fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION ).
12	Remove the thermostat and inspection operation. (See THERMOSTAT REMOVAL/INSTALLATION ). (See THERMOSTAT INSPECTION ). Is the thermostat normal?	Yes	Inspect and repair or replace the throttle body. If throttle body is normal or the problem remains, replace the injector driver module.
12		No	Replace thermostat.
13	Verify test results. If normal, return to the diagnostic index to service any additional symptoms. If a malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform the repair or diagnosis. If the vehicle is repaired, troubleshooting is completed. If the vehicle is not repaired or additional diagnostic information is not available, reprogram the PCM if a later calibration is available. Retest.