DTC P2502:00 [ZJ, ZY]

id0102c0709500

DTC P2502:00

Charging system voltage problem

DETECTION CONDITION

•  The PCM determines that the generator output voltage is 17 V or more or the battery voltage is 11 V or less while the engine running.

Diagnostic support note

•  This is continuous monitor (other).

•  The MIL does not illuminate.

•  FREEZE FRAME DATA is available.

•  The DTC is stored in the PCM memory.

POSSIBLE CAUSE

•  Battery malfunction

•  Generator terminal B installation nut looseness

•  Battery positive terminal looseness

•  Open circuit or short to ground in wiring harness between battery positive terminal and generator terminal B

―  Short to ground in wiring harness between battery positive terminal and generator terminal B

―  STR 250 A fuse malfunction

―  Open circuit in wiring harness between battery positive terminal and generator terminal B

•  Generator malfunction

•  PCM malfunction

DTC P2502:00	Charging system voltage problem
DETECTION CONDITION	• The PCM determines that the generator output voltage is 17 V or more or the battery voltage is 11 V or less while the engine running. Diagnostic support note • This is continuous monitor (other). • The MIL does not illuminate. • FREEZE FRAME DATA is available. • The DTC is stored in the PCM memory.
POSSIBLE CAUSE	• Battery malfunction • Generator terminal B installation nut looseness • Battery positive terminal looseness • Open circuit or short to ground in wiring harness between battery positive terminal and generator terminal B ― Short to ground in wiring harness between battery positive terminal and generator terminal B ― STR 250 A fuse malfunction ― Open circuit in wiring harness between battery positive terminal and generator terminal B • Generator malfunction • PCM malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAVE BEEN RECORDED • Have the FREEZE FRAME DATA and DIAGNOSTIC MONITORING TEST RESULTS (other related) been recorded?	Yes	Go to the next step.
1		No	Record the FREEZE FRAME DATA and DIAGNOSTIC MONITORING TEST RESULTS on the repair order, then go to the next step.
2	VERIFY RELATED SERVICE INFORMATION AVAILABILITY • Verify related Service Information availability. • Is any related Service Information available?	Yes	Perform repair or diagnosis according to the available Service Information. • If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	INSPECT BATTERY • Turn the ignition switch off. • Inspect the battery. (See BATTERY INSPECTION [ZJ, ZY].) • Is there any malfunction?	Yes	Recharge or replace the battery, then go to Step 8. (See BATTERY RECHARGING [ZJ, ZY].) (See BATTERY REMOVAL/INSTALLATION [ZJ, ZY].)
3		No	Go to the next step.
4	INSPECT POOR INSTALLATION NUT OF GENERATOR TERMINAL B • Turn the ignition switch off. • Inspect the generator terminal B installation nut for looseness. • Is the nut loose?	Yes	Retighten the generator terminal B installation nut, then go to Step 8.
4		No	Go to the next step.
5	INSPECT POOR INSTALLATION OF BATTERY POSITIVE TERMINAL • Inspect the battery positive terminal for looseness. • Is the terminal loose?	Yes	Connect the battery positive terminal correctly, then go to Step 8.
5		No	Go to the next step.
6	INSPECT BATTERY CHARGING CIRCUIT FOR OPEN CIRCUIT OR SHORT TO GROUND • Disconnect the generator terminal B. • Measure the voltage between generator terminal B (wiring harness-side) and body ground. • Is the voltage B+?	Yes	Go to the next step.
6		No	Inspect the STR 250 A fuse. • If the fuse is melt: ― Repair or replace the wiring harness for a possible short to ground. ― Replace the fuse. • If the fuse is deterioration: ― Replace the fuse. • If the fuse is normal: ― Repair or replace the wiring harness for a possible open circuit. Go to Step 8.
7	INSPECT GENERATOR • Turn the ignition switch off. • Inspect the generator. (See GENERATOR INSPECTION [ZJ, ZY].) • Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to the next step. (See GENERATOR REMOVAL/INSTALLATION [ZJ, ZY].)
7		No	Go to the next step.
8	VERIFY DTC TROUBLESHOOTING COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [ZJ, ZY].) • Perform the KOER self test. (See KOEO/KOER SELF TEST [ZJ, ZY].) • Is the same DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [ZJ, ZY].)
8		No	Go to the next step.
9	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [ZJ, ZY].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [ZJ, ZY].)
9		No	DTC troubleshooting completed.