Diagnostic procedure

DTC P2503 - DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA HAS BEEN RECORDED Has FREEZE FRAME DATA been recorded?	Yes	Go to the next step.
1		No	Record FREEZE FRAME DATA on repair order, then go to the next step.
2	VERIFY RELATED REPAIR INFORMATION AVAILABILITY Check for related Service Bulletins and/or online 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.
2		No	Go to the next step.
3	INSPECT DRIVE BELT CONDITION Verify that drive belt auto tensioner indicator mark in not exceeding limit. (See DRIVE BELT INSPECTION .) Is front drive belt okay?	Yes	Go to the next step.
3		No	Replace or adjust drive belt, then go to Step 9.
4	INSPECT GENERATOR CONNECTOR FOR POOR CONNECTION Turn the ignition switch off. Disconnect generator connector. Check for poor connection (damaged, pulled-out pins, corrosion, etc.). Is there any malfunction?	Yes	Repair or replace the terminal, then go to Step 9.
4		No	Go to the next step.
5	INSPECT GENERATOR CIRCUIT FOR SHORT TO GND Turn the ignition switch off. Check continuity between the following circuits: Generator terminal D (harness-side) and body GND Generator terminal P (harness-side) and body GND Is there continuity?	Yes	Repair or replace harness for short to GND, then go to Step 9.
5		No	Go to the next step.
6	INSPECT GENERATOR Inspect generator. (See GENERATOR INSPECTION .) Is there any malfunction?	Yes	Replace generator, then go to Step 9. (See GENERATOR REMOVAL/INSTALLATION .)
6		No	Go to the next step.
7	INSPECT PCM CONNECTOR FOR POOR CONNECTION Turn the ignition switch off. Disconnect PCM connector. Check for poor connection (such as damaged, pulled-out pins, and corrosion). Is there any malfunction?	Yes	Repair or replace the terminal, then go to Step 9.
7		No	Go to the next step.
8	INSPECT GENERATOR CIRCUIT FOR OPEN CIRCUIT Turn the ignition switch off. Check continuity between the following circuits: Generator terminal D (harness-side) and PCM terminal 36 (harness-side) Generator terminal P (harness-side) and PCM terminal 63 (harness-side) Is there continuity?	Yes	Go to the next step.
8		No	Repair or replace harness for open circuit, then go to the next step.
9	VERIFY TROUBLESHOOTING OF DTC P2503 COMPLETED Make sure to reconnect all disconnected connectors. Clear the DTC from the memory using the WDS or equivalent. Turn ignition switch to OFF, then start engine. Is same DTC present?	Yes	Replace PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION .)
9		No	Go to the next step.
10	VERIFY AFTER REPAIR PROCEDURE Perform "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE .)
10		No	Troubleshooting completed.