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11.7 Failure in Driver Stage of Injector Failure codes: P0201, P0202, P0203, P0204, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271 No. Operating steps Result Follow up steps 1 Close the ignition switch, and the engine stops.
Next step 2 Pull out each electromagnetic injector joint on harness in turn, and then lap the two pins of multimeter between 2# pin of the joint and the engine.
Next step Yes Repeat 2 All yes 6 3 Put the ignition switch to “ON”. Observe if, at the instant when the ignition switch cuts in, the multimeter displays an around 12V voltage value of battery (mainly check if the injector has power supply, which is provided by main relay). No Next step Yes Repair or replace harness 4 Use a multimeter to check in turn if it is break or short circuit between 87# pin of output terminal of main relay of the engine and 1# pin of each electromagnetic injector joint. No Next step 5 Repair or replace fuel pump relay and main relay and their circuits. Yes Repair or replace harness 6 Connect the adaptor between ECU and harness; use a multimeter to check in turn if it is break or short circuit between 27#, 7#, 47# or 6# pins of ECU and 2# pin of each corresponding electromagnetic injector joint on harness. No Next step Yes Repeat 7 All yes Next step 7 Use a multimeter to check in turn if a resistance between 12Ω and 16Ω is present at 20 between ℃ 1# and 2# pins (and resistance value of injector) of the electromagnetic injectors. No Replace the electromagnetic injector Yes Repeat 8 8 Re-plug all electromagnetic injector joints, engage the gear to neutral position, start the engine, and then let it run at idle speed. Pull out all electromagnetic injector joints on harness in turn. Whenever a joint is pulled out, observe if engine vibration is aggravated accordingly (equivalent to spark out experiment). No Replace ECU |