[13C] MULTIPORT FUEL INJECTION (MPI) <4G69> - - TROUBLESHOOTING - SYMPTOM PROCEDURES - Inspection Procedure 1: Communication with All System is Not Possible | PRINT PAGE / INDEX / PRIOR / NEXT

SYMPTOM PROCEDURES

Inspection Procedure 1: Communication with All System is Not Possible
OPERATION Battery voltage is applied to diagnosis connector (terminal No.16). Diagnosis connector (terminals No. 4 and 5) are earthed to the vehicle body.
COMMENT ON TROUBLE SYMPTOM Failure is possibly caused by failed power supply circuit or failed earthing circuit of diagnosis connector.
PROBABLE CAUSE Failed diagnosis connector Open/short circuit in diagnosis connector circuit Failed MUT-II/III
| DIAGNOSIS PROCEDURE NOTE: *1 : L.H. drive vehicles *2 : R.H. drive vehicles
| STEP 1: Check connector: C-24 diagnosis connector
| Q: Is the check result normal? YES: Go to Step 2 . NO: Repair.
| STEP 2: Perform resistance measurement at C-24 diagnosis connector.
| Disconnect connector, and measure at harness side. Resistance between terminal No. 4 and earth, also between terminal No. 5 and earth. OK: 2 Ω or less Q: Is the check result normal? YES: Go to Step 3 . NO: Check and repair harness between C-24 (terminal No. 4) diagnosis connector and body earth, also between C-24 (terminal No. 5) diagnosis connector and body earth. Check earthing line for open circuit and damage.
| STEP 3: Perform voltage measurement at C-24 diagnosis connector.
| Disconnect connector, and measure at the harness side. Voltage between terminal No. 16 and earth. OK: System voltage Q: Is the check result normal? YES: Go to Step 4 . NO: Check intermediate connectors C-116*1 , A-14*2 C-125*2 , C-204 and C-205 and repair if necessary. If connectors are normal, check and repair harness between C-24 (terminal No. 16) diagnosis connector and battery. Check power supply line for open/short circuit.
| STEP 4: Replace MUT-II/III After replacing the MUT-II/III, re-check the trouble symptoms. Q: Does trouble symptom persist? YES: Go to Step 5 . NO: Check end
| STEP 5: Check harness between C-24 (terminal No. 16) diagnosis connector and battery.
| NOTE: Before checking harness, check intermediate connectors C116*1 , A-14*2 , C-125*2 , C-204 and C-205, and repair if necessary. Check power supply line for damage. Q: Is the check result normal? YES: Check and repair harness between C-24 (terminal No. 4 and No. 5) diagnosis connector and body earth. Check earthing line for damage. NO: Repair.

[13C] MULTIPORT FUEL INJECTION (MPI) <4G69> - - TROUBLESHOOTING - SYMPTOM PROCEDURES - Inspection Procedure 1: Communication with All System is Not Possible | PRINT PAGE / INDEX / PRIOR / NEXT

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