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ON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM (ZM)] 01–02A–70 End Of Sie DTC P0402 [ZM] A3U010201086W17 Diagnostic procedure 9 MONITOR EGR SYSTEM BY DRIVE MODE • Make sure to reconnect all disconnected • Run OBD-II Drive Mode 1 and 2. • Check EGR System Monitor completion status • Has EGR system been monitored? Yes Go to next step. No Retry this step. 10 VERIFY TROUBLESHOOTING OF DTC P0401 • Access DIAGNOSTIC MONITORING TEST • Verify TEST ID 10:41:00 value. • Is value within specification? Yes Go to next step. No Replace PCM, then go to next step. 11 VERIFY AFTER REPAIR PROCEDURE • Perform “After Repair Procedure”. • Is there any DTC present? Yes Go to applicable DTC inspection. (See 01–02A–15 DTC TABLE [ZM].) No Troubleshooting completed. STEP INSPECTION ACTION DTC P0402 EGR flow excessive detected DETECTION CONDITION • Difference in intake manifold pressures when EGR is operated and when it is stopped is too large. Diagnostic support note • This is an intermittent monitor (EGR). • MIL illuminates if PCM detects the above malfunction conditions in two consecutive drive cycles. • PENDING CODE is available if PCM detects the above malfunction condition during first drive cycle. • FREEZE FRAME DATA is available. • DTC is stored in PCM memory. POSSIBLE CAUSE • EGR valve gasket is not installed. • EGR valve gasket has been damaged. • PCM 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 INSPECT FOR OTHER DTCS • Turn ignition key to OFF then start engine. • Have other DTCs been stored? Yes Go to applicable DTC troubleshooting. No Go to next step. 4 INSPECT EGR VALVE GASKET • Turn ignition key to OFF. • Remove EGR valve. • Is EGR valve gasket installed? Yes Go to next step. No Install EGR valve gasket, then go to Step 6. 5 INSPECT EGR VALVE GASKET MALFUNCTION • Does EGR valve gasket have any crack and/or Yes Replace EGR valve gasket, then go to Step 6. No Go to next step. 6 MONITOR EGR SYSTEM BY DRIVE MODE • Make sure to reconnect all disconnected • Run OBD-II Drive Mode 1 and 2. • Check EGR System Monitor completion status • Has EGR system been monitored? Yes Go to next step. No Retry this step. 1712-1U-01G(01-02A).fm 70 ページ 2001年6月29日 金曜日 午後2時20分 |