Diagnostic procedure

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DIAGNOSTIC PROCEDURE CHART

STEP	INSPECTION		ACTION
1	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.
1		No	Go to the next step.
2	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 .) Is the DTC P0703:00 also present?	Yes	Go to the applicable DTC inspection. (See DTC P0703:00 .)
2		No	Go to the next step.
3	INSPECT BRAKE SWITCH CONNECTOR CONDITION Switch the ignition to off. Disconnect the brake switch connector. Inspect for poor connection (such as damaged/pulled-out pins, corrosion). Is there any malfunction?	Yes	Repair or replace the terminal and/or connector, then go to Step 9.
3		No	Go to the next step.
4	INSPECT BRAKE SWITCH GROUND CIRCUIT FOR OPEN CIRCUIT Brake switch connector is disconnected. Inspect for continuity between brake switch terminal B (wiring harness-side) and body ground. Is there continuity?	Yes	Go to the next step.
4		No	Repair or replace the wiring harness for a possible open circuit, then go to Step 9.
5	INSPECT BRAKE SWITCH SIGNAL CIRCUIT FOR SHORT TO GROUND Brake switch connector is disconnected. Inspect for continuity between brake switch terminal C (wiring harness-side) and body ground. Is there continuity?	Yes	If the short to ground circuit could be detected: Repair or replace the wiring harness for a possible short to ground. If the short to ground circuit could not be detected: Replace the PCM (short to ground in PCM internal circuit). (See PCM REMOVAL/INSTALLATION .) Go to Step 9.
5		No	Go to the next step.
6	INSPECT PCM CONNECTOR CONDITION Disconnect the PCM connector. Inspect for poor connection (such as damaged/pulled-out pins, corrosion). Is there any malfunction?	Yes	Repair or replace the terminal and/or connector, then go to Step 9.
6		No	Go to the next step.
7	INSPECT BRAKE SWITCH SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY Brake switch and PCM connectors are disconnected. Switch the ignition to ON (engine off). Measure the voltage between brake switch terminal C (wiring harness-side) and body ground. Is there any voltage?	Yes	Repair or replace the wiring harness for a possible short to power supply, then go to Step 9.
7		No	Go to the next step.
8	INSPECT BRAKE SWITCH SIGNAL CIRCUIT FOR OPEN CIRCUIT Brake switch and PCM connectors are disconnected. Switch the ignition to off. Inspect for continuity between brake switch terminal C (wiring harness-side) and PCM terminal 1AF (wiring harness-side). Is there continuity?	Yes	Replace the brake switch, then go to the next step. (See BRAKE PEDAL REMOVAL/INSTALLATION .)
8		No	Repair or replace the wiring harness for a possible open circuit, then go to the next step.
9	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 .) Switch the ignition to ON (engine off). Depress and release the brake pedal more than 5 times. Perform the DTC Reading Procedure. (See ON-BOARD DIAGNOSTIC TEST .) Is the same 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.
9		No	Go to the next step.
10	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 .)
10		No	DTC troubleshooting completed.