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ON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM (FS)] 01–02B–20 End Of Sie DTC P0032 [FS] A3U010201084W02 4 INSPECT HO2S HEATER (FRONT) • Measure resistance between HO2S (front) • Is resistance approx. 5.6 ohms? Yes Go to next step. No Replace the HO2S (front), then go to Step 9. 5 INSPECT POWER CIRCUIT OF HO2S HEATER • Turn ignition key to ON (Engine OFF). • Measure voltage between HO2S (front) • Is voltage B+? Yes Go to next step. No Repair or replace harness for open circuit, then go to Step 6 INSPECT PCM CONNECTOR FOR POOR • Turn ignition key to OFF. • Disconnect PCM connector. • Check for poor connection at terminal 94 • Is there malfunction? Yes Repair terminal, then go to Step 9. No Go to next step. 7 INSPECT CONTROL CIRCUIT OF HO2S • Check for continuity between HO2S (front) • Is there continuity? Yes Repair or replace harness for short to ground, then go to Step 9. No Go to next step. 8 INSPECT CONTROL CIRCUIT OF HO2S • Connect breakout box with PCM connector • Check for continuity between HO2S (front) • Is there continuity? Yes Go to next step. No Repair or replace harness for open circuit, then go to Step 9 VERIFY TROUBLESHOOTING OF DTC P0031 • Make sure to reconnect all disconnected • Clear DTC from PCM memory using WDS or • Start engine and warm it up completely. • Is same PENDING CODE of DTC present? Yes Replace PCM, then go to next step. No Go to next step. 10 VERIFY AFTER REPAIR PROCEDURE • Perform “After Repair Procedure”. • Is there any DTC present? Yes Go to applicable DTC inspection. (See 01–02B–15 DTC TABLE [FS].) No Troubleshooting completed. STEP INSPECTION ACTION DTC P0032 HO2S heater (front) circuit high DETECTION CONDITION • PCM monitors HO2S heater (front) control signal at PCM terminal 94. If PCM turns HO2S heater (front) on Note • HO2S heater (front) is controlled by a duty signal. Diagnostic support note • This is an intermittent monitor (O 2 sensor heater). • 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 • Short to power circuit between HO2S (front) terminal D and PCM terminal 94 • Shorted HO2S (front) or PCM terminal • PCM malfunction 1712-1U-01G(01-02B).fm 20 ページ 2001年6月29日 金曜日 午後3時24分 |