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ON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM (ZM)] 01–02A–122 Diagnostic procedure DTC P1487 EGR boost sensor solenoid valve circuit malfunction STEP INSPECTION ACTION 1 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. 2 CLASSIFY INTERMITTENT CONCERN OR • Turn ignition key to OFF then ON (Engine • Is same DTC present? Yes Go to next step. No Intermittent concern exists. Go to INTERMITTENT 3 CLASSIFY OPEN CIRCUIT OR SHORT TO • Disconnect EGR boost sensor solenoid valve • Connect vacuum pump to EGR boost solenoid • Apply vacuum. • Wait for 5 seconds. • Is vacuum maintained? Yes Go to Step 5. No Go to next step. 4 INSPECT PASSAGE CONTROL OF EGR • Turn ignition key to OFF. • Disconnect EGR boost sensor solenoid valve • Apply vacuum and wait for 5 seconds. • Is vacuum maintained? Yes Repair or replace harness between solenoid valve terminal B and PCM terminal 98 for short to ground, then go to Step No Replace EGR boost sensor solenoid valve, then go to Step 5 INSPECT EGR BOOST SENSOR SOLENOID • Turn ignition key to OFF. • Check for poor connection (damaged/pulled- • Is there malfunction? Yes Repair or replace terminal, then go to Step 10. No Go to next step. 1712-1U-01G(01-02A).fm 122 ページ 2001年6月29日 金曜日 午後2時20分 |