Diagnostic procedure

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DIAGNOSTIC PROCEDURE CHART

STEP	INSPECTION		ACTION
1	IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA (MODE 2) Is the DTC P2097:00 on FREEZE FRAME DATA (Mode 2)?	Yes	Go to the next step.
1		No	Go to troubleshooting procedures for DTC on FREEZE FRAME DATA (Mode 2). (See DTC TABLE .)
2	VERIFY FREEZE FRAME DATA (MODE 2)/SNAPSHOT DATA HAS BEEN RECORDED Has the FREEZE FRAME DATA (Mode 2)/snapshot data been recorded?	Yes	Go to the next step.
2		No	Record the FREEZE FRAME DATA (Mode 2)/snapshot data on the repair order, then go to the next step.
3	VERIFY RELATED REPAIR INFORMATION AVAILABILITY Verify related Service Bulletins and/or on-line repair information availability. Is any related repair information available?	Yes	Perform repair or diagnosis according to the available repair information. If the vehicle is not repaired, go to the next step.
3		No	Go to the next step.
4	VERIFY RELATED PENDING AND STORED DTC Switch the ignition to off, then to ON (engine off). Verify pending and stored DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST .) Are any other DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE .)
4		No	Go to the next step.
5	VERIFY CURRENT INPUT SIGNAL STATUS OF HO2S Inspect the HO2S. (See HEATED OXYGEN SENSOR (HO2S) INSPECTION .) Is there any malfunction?	Yes	Go to the next step.
5		No	Go to Step 7.
6	INSPECT EXHAUST GAS LEAKAGE Visually inspect for the exhaust gas leakage between the TWC and HO2S. Is there any leakage?	Yes	Repair or replace the malfunctioning parts according to the inspection results, then go to Step 21.
6		No	Replace the HO2S, then go to Step 21. (See HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION .)
7	INSPECT (AT SENSOR Inspect the IAT sensor. (See INTAKE AIR TEMPERATURE (IAT) SENSOR INSPECTION .) Is there any malfunction?	Yes	Replace the IAT sensor, then go to Step 21. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION .)
7		No	Go to the next step.
8	VERIFY CURRENT INPUT SIGNAL STATUS Access the following PIDs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST .) ECT MAF TPREL VSS Is there any signal that is far out of specification when the ignition is switched to ON and the engine runs? (See PCM INSPECTION .)	Yes	inspect the suspected sensor and related wiring harness. Repair or replace the malfunctioning part according to the inspection results, then go to Step 21.
8		No	Go to the next step.
9	VERIFY CURRENT INPUT SIGNAL STATUS UNDER FREEZE FRAME DATA (MODE 2) CONDITION 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 the following PIDs using the M-MDS under the FREEZE FRAME DATA (Mode 2) condition. (See ON-BOARD DIAGNOSTIC TEST .) ECT MAF TPREL VSS Is there any signal which causes drastic changes?	Yes	Inspect the suspected sensor and related wiring harness. Repair or replace the malfunctioning part according to the inspection results, then go to Step 21.
9		No	Go to the next step.
10	VERIFY CURRENT INPUT SIGNAL STATUS OF A/F SENSOR Inspect the A/F sensor. (See AIR FUEL RATIO (A/F) SENSOR INSPECTION .) Is there any malfunction?	Yes	Go to the next step.
10		No	Go to Step 12.
11	INSPECT EXHAUST GAS LEAKAGE Visually inspect for the exhaust gas leakage between the exhaust manifold and A/F sensor. Is there any leakage?	Yes	Repair or replace the malfunctioning parts according to the inspection results, then go to Step 21.
11		No	Replace the A/F sensor, then go to Step 21. (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION .)
12	INSPECT FUEL LINE PRESSURE Switch the ignition to off. NOTE: If engine will not start, inspect fuel line pressure with ignition switches to ON. Inspect the fuel line pressure with engine is running. (See FUEL LINE PRESSURE INSPECTION .) Is there any malfunction?	Yes	If fuel pressure is too high: Replace the fuel pump unit, then go to Step 21. (See FUEL PUMP UNIT REMOVAL/INSTALLATION .) If fuel pressure is low: Go to the next step.
12		No	Go to Step 14.
13	INSPECT FUEL LINE FOR LEAKAGE Visually inspect the fuel line from fuel pump to fuel distributor. Is there any leakage?	Yes	Repair or replace the malfunctioning parts according to the inspection results, then go to Step 21.
13		No	Inspect the low-pressure side fuel filter for foreign materials or stain inside fuel filter. If foreign materials or stain is found inside fuel filter (low-pressure side): Clean of fuel tank and filter. If foreign materials or stain is not found: Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION .) Go to Step 21.
14	INSPECT LONG TERM FUEL TRIM Access the LONGFT1 PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST .) Compare the LONGFT1 PID with recorded FREEZE FRAME DATA (Mode 2) at Stop 2. Is the LONGFT1 PID above FREEZE FRAME DATA (Mode 2)?	Yes	Go to the next step.
14		No	Go to Step 16.
15	INSPECT PURGE SOLENOID VALVE Inspect the purge solenoid valve. (See PURGE SOLENOID VALVE INSPECTION .) Is there any malfunction?	Yes	Replace the purge solenoid valve, then go to Step 21. (See PURGE SOLENOID VALVE REMOVAL/INSTALLATION .)
15		No	Go to the next step.
16	INSPECT IGNITION SYSTEM OPERATION Perform the Spark Test. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION .) Is strong blue spark visible at each cylinder?	Yes	Go to Step 18.
16		No	Go to the next step.
17	INSPECT IGNITION COIL RELATED WIRING HARNESS Inspect the ignition coil related wiring harness condition (intermittent open or short) for all cylinders. Is there any malfunction?	Yes	Repair or replace the malfunctioning wiring harness, then go to Step 21.
17		No	Repair or replace the malfunctioning parts according to the Spark Test results, then go to Step 21.
18	INSPECT FUEL INJECTOR OPERATION Inspect the fuel injector operation. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION .) Is there any malfunction?	Yes	Repair or replace the malfunctioning parts according to the inspection results, then go to Step 21.
18		No	Go to the next step.
19	INSPECT ENGINE COMPRESSION Inspect the engine compression. (See COMPRESSION INSPECTION .) Is there any malfunction?	Yes	Overhaul the engine for repair, then go to Step 21.
19		No	Go to the next step.
20	INSPECT ECT SENSOR Inspect the ECT sensor. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION .) Is there any malfunction?	Yes	Replace the ECT sensor, then go to the next step. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION .)
20		No	Go to the next step.
21	VERIFY DTC TROUBLESHOOTING COMPLETED Make sure to reconnect all disconnected connectors. Clear the DTC from the PCM memory using the M-MDS. (See AFTER REPAIR PROCEDURE .) After warming up the engine, maintain the idle status for 1 min or more. Perform the Pending Trouble Code Access Procedure. (See ON-BOARD DIAGNOSTIC TEST .) Is the PENDING CODE for this DTC present?	Yes	Repeat the inspection from Step 1. If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION .) Go to the next step.
21		No	Go to the next step.
22	VERIFY AFTER REPAIR PROCEDURE Perform the "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE .)
22		No	DTC troubleshooting completed.