DTC P1250 [G6]

id010295871100

DTC P1250

PRC solenoid valve circuit malfunction

DETECTION CONDITION

•  Open or short circuit is observed in the PRC solenoid valve when the ignition switch is turned on.

POSSIBLE CAUSE

•  PRC solenoid valve malfunction

•  Poor connection of connectors at PRC solenoid valve and/or PCM

•  Short to power supply circuit in wiring from PRC solenoid valve B to PCM terminal 2T

•  Short to GND in wiring from PRC solenoid valve terminal B to PCM terminal 2T

•  Short to GND in wiring from PRC solenoid valve terminal A to main relay terminal D

•  Open circuit in wiring from PCM terminal 2T and/or 2C to engine GND

•  Open circuit in wiring from PRC solenoid valve terminal B to PCM terminal 2T

•  Open circuit in wiring from PRC solenoid valve terminal A to main relay terminal D

DTC P1250	PRC solenoid valve circuit malfunction
DETECTION CONDITION	• Open or short circuit is observed in the PRC solenoid valve when the ignition switch is turned on.
POSSIBLE CAUSE	• PRC solenoid valve malfunction • Poor connection of connectors at PRC solenoid valve and/or PCM • Short to power supply circuit in wiring from PRC solenoid valve B to PCM terminal 2T • Short to GND in wiring from PRC solenoid valve terminal B to PCM terminal 2T • Short to GND in wiring from PRC solenoid valve terminal A to main relay terminal D • Open circuit in wiring from PCM terminal 2T and/or 2C to engine GND • Open circuit in wiring from PRC solenoid valve terminal B to PCM terminal 2T • Open circuit in wiring from PRC solenoid valve terminal A to main relay terminal D

Diagnostic procedure

STEP	INSPECTION		ACTION
1	VERIFY RELATED SERVICE INFORMATION AVAILABILITY • Check for related Service Information availability. • Is any related Service Information available?	Yes	Perform repair or diagnosis according to available Service Information. • If vehicle is not repaired, go to the next step.
1		No	Go to the next step.
2	• Verify stored DTC. • Have DTCs P0100, P0335, P0443 and/or P0505 been stored?	Yes	Inspect for open circuit in following wiring harnesses, then go to Step 9. • Main relay terminal D and IAC valve, PRC solenoid valve, MAF sensor, CMP sensor, purge solenoid valve • Between PCM terminal 2C and engine ground
2		No	Go to the next step.
3	• Does PRC solenoid valve connector or PCM connector have poor connection?	Yes	Repair or replace connector, then go to Step 9.
3		No	Go to the next step.
4	• Disconnect PRC solenoid valve connector. • Turn ignition switch on. • Is there battery positive voltage at harness side connector terminal A?	Yes	Go to the next step.
4		No	Inspect for open or short circuit in wiring harness (between main relay terminal D and PRC solenoid valve terminal A), then go to Step 9.
5	• Disconnect PCM connector. • PRC solenoid valve is disconnected. • Is there continuity between PRC solenoid valve harness side connector terminal B and PCM harness side connector terminal 2T?	Yes	Go to the next step.
5		No	Repair open circuit, then go to Step 9.
6	• Is there continuity between PCM harness side connector terminals 2T and 1B?	Yes	Repair short to power supply circuit, then go to Step 9.
6		No	Go to the next step.
7	• Is there continuity from PCM harness side connector terminals 2T to body GND?	Yes	Repair short to GND circuit, then go to Step 9.
7		No	Go to the next step.
8	• Is PRC solenoid valve normal? (See PRESSURE REGULATOR CONTROL (PRC) SOLENOID VALVE INSPECTION [G6].)	Yes	Go to the next step.
8		No	Replace PRC solenoid valve, then go to the next step.
9	VERIFY TROUBLESHOOTING OF DTC P1250 COMPLETED • Make sure to reconnect all disconnected connectors. • Clear DTC from memory using the M-MDS. • Start engine. • Retrieve the DTCs using the M-MDS. • Is same DTC present?	Yes	Replace PCM, then go to next step.
9		No	Go to the next step.
10	VERIFY AFTER REPAIR PROCEDURE • Perform “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [G6].) • Is there any DTC present?	Yes	Go to applicable DTC inspection. (See DTC TABLE [G6].)
10		No	Troubleshooting completed.