[13C] MULTIPORT FUEL INJECTION (MPI) <4G69> - - TROUBLESHOOTING - SYMPTOM PROCEDURES - Inspection Procedure 19: Battery Run Down | PRINT PAGE / INDEX / PRIOR / NEXT

Inspection Procedure 19: Battery Run Down
COMMENT ON TROUBLE SYMPTOM Failure is possibly caused by failed alternator, failed generation control circuit or other faults.
PROBABLE CAUSE Failed battery Alternator G terminal short-circuited Failed alternator Failed engine-A/T-ECU
| DIAGNOSIS PROCEDURE
| STEP 1. Check battery voltage. Measure battery voltage during cranking. OK: 8 V or more Q: Is the check result normal? YES: Go to Step 2 . NO: Check battery (Refer to GROUP 54A - Battery - On-vehicle Service - Battery Test ).
| STEP 2. Connector check: B-30 alternator connector
| Q: Is the check result normal? YES: Go to Step 3 . NO: Repair.
| STEP 3. Perform voltage measurement at B-30 alternator connector.
| Disconnect connector, and measure at harness side. Ignition switch: ON Voltage between terminal No. 3 and earth. OK: System voltage Q: Is the check result normal? YES: Go to Step 5 . NO: Go to Step 4 .
| STEP 4. Connector check: C-303 ignition switch connector
| Q: Is the check result normal? YES: Check intermediate connectors B-19, C-04, C-05, C-105, C-203 and C-205, and repair if necessary. If intermediate connectors are normal, check and repair harness between B-30 (terminal No. 3) alternator connector and C-303 (terminal No. 2) ignition switch connector. Check power supply line for open/short circuit. NO: Repair.
| STEP 5. Connector check: C-135 engine-A/T-ECU connector
| Q: Is the check result normal? YES: Go to Step 6 . NO: Repair.
| STEP 6. Perform voltage measurement at C-135 engine-A/T-ECU connector
| Disconnect connector, and measure at harness side. Ignition switch: ON Voltage between terminal No. 45 and earth. OK: System voltage Q: Is the check result normal? YES: Go to Step 8 . NO: Go to Step 7 .
| STEP 7. Check harness between C-135 (terminal No. 45) engine-A/T-ECU connector and B-30 (terminal No. 1) alternator connector.
| Check output line for open/short circuit. Q: Is the check result normal? YES: replace alternator. NO: Repair.
| STEP 8. Perform voltage measurement at C-135 engine-A/T-ECU connector.
| Measure engine-A/T-ECU terminal voltage. Engine: Idling after warm-up Transmission: P range Radiator fan: Inactive Voltage between terminal No. 45 and earth. OK: Switching the headlamps to ON from OFF causes the voltage to increase. Q: Is the check result normal? YES: Go to Step 9 . NO: Replace alternator.
| STEP 9. Check the trouble symptoms. Q: Does trouble symptom persist? YES: Replace engine-A/T-ECU. NO: Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points ).

[13C] MULTIPORT FUEL INJECTION (MPI) <4G69> - - TROUBLESHOOTING - SYMPTOM PROCEDURES - Inspection Procedure 19: Battery Run Down | PRINT PAGE / INDEX / PRIOR / NEXT

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