[13C] MULTIPORT FUEL INJECTION (MPI) <4G69> - - TROUBLESHOOTING - INSPECTION PROCEDURE FOR DIAGNOSIS CODES - Code No. P0201: No. 1 Injector System | PRINT PAGE / INDEX / PRIOR / NEXT

Code No. P0201: No. 1 Injector System
OPERATION Power is supplied to the injector (terminal No. 1) from the engine control relay (terminal No. 1). The engine-A/T-ECU (terminal No. 1) makes the power transistor in the unit be in "ON" position, and that makes currents go on the injector (terminal No. 2).
FUNCTION The engine-A/T-ECU controls the power supply interval of the injector. The fuel injection amount of the injector depends on the power supply interval.
TROUBLE JUDGMENT Check Conditions While engine is running. Injector operation (by carrying out actuator test) is not in progress. <Vehicles except for Hong kong> Judgment Criterion Injector coil surge voltage (battery positive voltage + 2 V) has not been detected for 2 seconds.
PROBABLE CAUSE Failed No. 1 injector Open/short circuit in injector circuit or loose connector contact Failed engine-A/T-ECU
| DIAGNOSIS PROCEDURE
| STEP 1. MUT-II/III actuator test Item 01: No. 1 injector OK: Idling state varies. Q: Is the check result normal? YES: Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points ). NO: Go to Step 2 .
| STEP 2. Connector check: B-01 No. 1 injector connector
| Q: Is the check result normal? YES: Go to Step 3 . NO: Repair.
| STEP 3. Check No. 1 injector itself. Check No. 1 Injector itself (Refer to ). Q: Is the check result normal? YES: Go to Step 4 . NO: Replace No. 1 injector.
| STEP 4. Perform voltage measurement at B-01 No. 1 injector connector.
| Disconnect connector, and measure at harness side. Ignition switch: ON Voltage between terminal No. 1 and earth. OK: System voltage Q: Is the check result normal? YES: Go to Step 6 . NO: Go to Step 5 .
| STEP 5. Connector check: B-17X engine control relay connector
| Q: Is the check result normal? YES: Check and repair harness between B-17X (terminal No. 1) engine control relay connector and B-01 (terminal No. 1) No. 1 injector connector. Check power supply line for open/short circuit. NO: Repair.
| STEP 6. Connector check: B-17X engine control relay connector
| Q: Is the check result normal? YES: Go to Step 7 . NO: Repair.
| STEP 7. Check harness between B-17X (terminal No. 1) engine control relay connector and B-01 (terminal No. 1) No. 1 injector connector.
| Check power supply line for damage. Q: Is the check result normal? YES: Go to Step 8 . NO: Repair.
| STEP 8. Connector check: C-134 engine-A/T-ECU connector
| Q: Is the check result normal? YES: Go to Step 9 . NO: Repair.
| STEP 9. Check harness between B-01 (terminal No. 2) No. 1 injector connector and C-134 (terminal No. 1) engine-A/T-ECU connector.
| Check output line for open/short circuit and damage. Q: Is the check result normal? YES: Go to Step 10 . NO: Repair.
| STEP 10. Perform signal wave pattern measurement at C-134 engine-A/T-ECU connector (Using an oscilloscope).
| Engine: Idling Transmission: P range Voltage between terminal No. 1 and earth. OK: Waveforms should be display on Inspection procedure using an oscilloscope (Refer to ). Q: Is the check result normal? YES: Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points ). NO: Replace engine-A/T-ECU.

[13C] MULTIPORT FUEL INJECTION (MPI) <4G69> - - TROUBLESHOOTING - INSPECTION PROCEDURE FOR DIAGNOSIS CODES - Code No. P0201: No. 1 Injector System | PRINT PAGE / INDEX / PRIOR / NEXT

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