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ON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM (ZM)] 01–02A–106 End Of Sie DTC P1102 [ZM] A3U010201083W17 Diagnostic procedure DTC P1102 MAF sensor inconsistent with TP sensor (lower than expected) DETECTION CONDITION • PCM compares actual input signal from MAF sensor with expected input signal from MAF sensor which Diagnostic support note • This is a continuous monitor (CCM). • MIL illuminates if PCM detects the above malfunction condition 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 • MAF sensor malfunction • TP sensor malfunction • Electrical corrosion in MAF signal circuit • Voltage drops in MAF signal circuit 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 VERIFY CURRENT INPUT SIGNAL STATUS-IS • Connect WDS or equivalent to DLC-2. • Start the engine. • Access ECT, TP and MAF PIDs. • Warm up the engine until ECT PID is above °°°° C {176 °°°° F}. • Drive the vehicle. • Read MAF PID while TP PID is above 50%. • Is MAF PID reading below 4.8 g/s {0.63 lb/ Yes Make sure that TP sensor resistance changes smoothly while gradually opening throttle valve. • If not, replace TP sensor and go to Step 6. • For others, go to next step. No Intermittent concern exists. Go to INTERMITTENT 4 INSPECT MAF SENSOR CONNECTOR FOR • Turn ignition key to OFF. • Disconnect MAF/IAT sensor connector. • Check for poor connection (damaged/pulled- • Is there malfunction? Yes Repair or replace suspected terminal or MAF/IAT sensor, then go to Step 6. No Go to next step. 5 INSPECT PCM CONNECTOR FOR POOR • Disconnect PCM connector. • Check for poor connection (damaged/pulled- • Is there malfunction? Yes Repair terminal, then go to next step. No Replace MAF/IAT sensor, then go to next step. 1712-1U-01G(01-02A).fm 106 ページ 2001年6月29日 金曜日 午後2時20分 |