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ON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM (ZM)] 01–02A–138 End Of Sie 4 CLASSIFY OPEN CIRCUIT OR SHORT TO • Disconnect VTCS solenoid valve tube that • Connect vacuum pump to VTCS solenoid • Apply vacuum and wait 5 seconds. • Is vacuum maintained? Yes Go to Step 6. No Go to next step. 5 INSPECT PASSAGE CONTROL OF VTCS • Turn ignition key to OFF. • Disconnect VTCS solenoid valve connector. • Is vacuum maintained? Yes Repair or replace harness between PCM terminal 19 and VTCS solenoid valve terminal B for short to ground, then go No Replace VTCS solenoid valve, then go to Step 11. 6 INSPECT VTCS SOLENOID VALVE • Turn ignition key to OFF. • Check for poor connection (damaged/pulled- • Is there malfunction? Yes Repair or replace terminal, then go to Step 11. No Go to next step. 7 INSPECT VTCS SOLENOID VALVE • Measure resistance between VTCS solenoid • Is resistance within 22—26 ohms? Yes Go to next step. No Replace VTCS solenoid valve, then go to Step 11. 8 INSPECT VTCS SOLENOID VALVE POWER • Disconnect VTCS solenoid valve connector. • Turn ignition key to ON (Engine OFF). • Measure voltage between VTCS solenoid • Is voltage B+? Yes Go to next step. No Repair or replace harness for open, then go to Step 11. 9 INSPECT PCM CONNECTOR FOR POOR • Turn ignition key to OFF. • Disconnect PCM connector. • Check for poor connection at PCM terminal 19. • Is there malfunction? Yes Repair terminal, then go to Step 11. No Go to next step. 10 INSPECT VTCS SOLENOID VALVE CONTROL • Connect VTCS solenoid valve connector. • Connect breakout box with PCM disconnected. • Turn ignition key to ON (Engine OFF). • Measure voltage between breakout box • Is voltage B+? Yes Go to next step. No Repair or replace harness for open or short to ground 11 VERIFY TROUBLESHOOTING OF DTC P1569 • Make sure to reconnect all disconnected • Clear DTC from PCM memory using WDS or • Start engine. • Verify that following conditions are met. °°°° C {149 °°°° F} — Engine speed: below 3,250 rpm • Is pending code of same DTC present? Yes Replace PCM, then go to next step. No Go to next step. 12 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 1712-1U-01G(01-02A).fm 138 ページ 2001年6月29日 金曜日 午後2時20分 |