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ON-BOARD DIAGNOSTIC [L3 WITH TC] 01-02–131 01-02 End Of Sie WM: DTC P04XX DTC P0401[L3 WITH TC] id010239815300 13 INSPECT STOPPER PIN MECHANISM • Remove the timing chain. • Inspect the stopper pin. (See01-10-27 VARIABLE VALVE TIMING • Is the stopper pin mechanism normal? Yes Go to the next step. No Replace the variable valve timing actuator, then go to Step 14 INSPECT ROTOR POSITION • Remove the variable valve timing actuator. (See01-10-28 VARIABLE VALVE TIMING • Is the rotor position at the maximum valve timing retard? Yes VARIABLE VALVE TIMING MECHANISM NORMAL Note • This DTC is detected as an intermittent concern. • The intermittent concern might be removed by cleaning the variable valve timing mode control Go to the next step. No Replace the variable valve timing actuator, then go to the 15 VERIFY TROUBLESHOOTING OF DTC P0340 • Make sure to reconnect all disconnected connectors. • Turn ignition switch to the ON position (Engine off). • Clear the DTC from the PCM memory using the M-MDS. • Start the engine. • Access the MAF PID using the M-MDS. Note • The MAF PID should indicate 1.95 g/s {0.25 lb/min.} or above during this test • Is same DTC present? Yes Replace the PCM, then go to the next step. No Go to the next step. 16 VERIFY AFTER REPAIR PROCEDURE • Perform the “After Repair Procedure”. (See01-02-10 AFTER REPAIR • Are any DTCs present? Yes Go to the applicable DTC inspection. No Troubleshooting completed. STEP INSPECTION ACTION DTC P0401 EGR flow insufficient detected DETECTION CONDITION • PCM monitors the difference in intake manifold pressures when the EGR is operated and when it is stopped. If the difference is too small, the PCM determines that the EGR flow is insufficient. Diagnostic support note • This is an intermittent monitor (EGR system). • The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM. • PENDING CODE is available if the PCM detects the above malfunction condition during first drive cycle. • FREEZE FRAME DATA is available. • DTCs are stored in the PCM memory. POSSIBLE CAUSE • EGR valve malfunction • MAP sensor malfunction • EGR gasket malfunction • Vacuum hose looseness or damage • PCM malfunction 1871-1U-06B(01-02).fm 131 ページ 2006年3月15日 水曜日 午前10時32分 |