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ON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM (FS)] 01–02B–128 Diagnostic procedure POSSIBLE CAUSE • PRC solenoid valve malfunction • Connector or terminal malfunction • Short to ground in wiring between PRC solenoid valve terminal B and PCM terminal 95 • Open circuit in wiring between main relay terminal D and PRC solenoid valve terminal A • Open circuit in wiring between PRC solenoid valve terminal B and PCM terminal 95 • Short to power circuit between PRC solenoid valve terminal B and PCM terminal 95 • PCM malfunction DTC P1250 Pressure regulator control (PRC) valve circuit malfunction STEP INSPECTION ACTION 1 VERIFY FREEZE FRAME DATA HAS BEEN • Has FREEZE FRAME DATA been recorded? Yes Go to next step. No Record FREEZE FRAME DATA on repair order, then go to 2 VERIFY RELATED REPAIR INFORMATION • Check for related Service Bulletins availability. • Is any related repair information available? Yes Perform repair or diagnosis according to available repair information. • If vehicle is not repaired, go to next step. No Go to next step. 3 CLASSIFY INTERMITTENT CONCERN OR • Clear DTC from memory using WDS or • Turn ignition key to OFF then Start engine. • Is PENDING CODE of same DTC present? Yes Go to next step. No Refer to intermittent concern. 4 CLASSIFY OPEN CIRCUIT OR SHORT TO • Disconnect PRC solenoid valve tube that • Connect vacuum pump to PRC solenoid valve. • Apply vacuum and wait 5 seconds. • Is vacuum maintained? Yes Go to Step 6. No Go to next step. 5 INSPECT PASSAGE CONTROL OF PRC • Turn ignition key to OFF. • Disconnect PRC solenoid valve connector. • Is vacuum maintained? Yes Repair or replace harness between PCM terminal 95 and PRC solenoid valve terminal B for short to ground, then go No Replace PRC solenoid valve, then go to Step 11. 1712-1U-01G(01-02B).fm 128 ページ 2001年6月29日 金曜日 午後3時24分 |