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ON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM (ZM)] 01–02A–114 End Of Sie DTC P1250 [ZM] A3U010201083W22 20 INSPECT SEALING OF ENGINE COOLANT Warning •••• Removing radiator cap when radiator is •••• When removing radiator cap, wrap a • Remove radiator cap. • Implement procedure to bleed air from engine • Is there any small bubble which makes engine Note • Large bubbles are normal since they are Yes Air gets in from poor sealing to head gasket or other areas between combustion chamber and engine coolant No Go to next step. 21 VERIFY TROUBLESHOOTING OF DTC P1170 • Make sure to reconnect all disconnected • Turn ignition key to ON (Engine OFF). • Clear DTC from memory using WDS or • Start engine. • Access ECT and RPM PIDs using WDS or • Make sure that ECT PID is above 80 °°°° C {176 °°°° F}. • Increase and keep engine speed above 1,500 • Is pending code of same DTC present? Yes Replace or reprogram PCM. Then go to next step. No Go to next step. 22 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 P1250 Pressure regulator control (PRC) valve circuit malfunction DETECTION CONDITION • PCM monitors input voltages from PRC solenoid valve. If voltage at PCM terminal 95 remains low or high, Diagnostic support note • This is a continuous monitor (CCM). • 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 • PRC solenoid valve malfunction • Connector or terminal malfunction • Short to ground in wiring between PRC solenoid valve terminal B and PCM terminal 95 • Open circuit in wiring between main relay terminal D and PRC solenoid valve terminal A • Open circuit in wiring between PRC solenoid valve terminal B and PCM terminal 95 • Short to power circuit between PRC solenoid valve terminal B and PCM terminal 95 • PCM malfunction 1712-1U-01G(01-02A).fm 114 ページ 2001年6月29日 金曜日 午後2時20分 |