Inspection Procedure 4: The Starter Is Impossible To Operate


PROBABLE CAUSES



DIAGNOSIS PROCEDURE

STEP 1. Check battery voltage.

  • Measure battery voltage during cranking.
OK: 8V or more

Q. Is the check result normal?
Go to Step 2 .
Check battery (Refer to GROUP 54A - Battery - On-vehicle Service - Battery Test ).

STEP 2. M.U.T.-III data list.

  • Item 40: Starter switch
OK:
    ON (Ignition switch: ST)
    OFF (Ignition switch: ON)

Q. Is the check result normal?
Go to Step 3 .
Go to Step 6 .

STEP 3. Check connector: A-10 and A-110 starter connector


Q. Are the check results normal?

Go to Step 4 .

Repair or replace.

STEP 4. Perform voltage measurement at A-10 starter connector.


  • Disconnect connector, and measure at the harness side.
  • Voltage between terminal No. 1 and earth.
OK: System voltage

Q. Is the check result normal?

Go to Step 5 .

Repair the harness wire.

STEP 5. Perform resistance measurement for open circuit at A-110 starter connector and A-16X starter relay connector.



  • Remove starter relay
  • Disconnect A-110 starter connector
  • Resistance between A-110 starter connector terminal No. 1 and A-16X starter relay connector terminal No. 3.
OK: Continuity (2 Ω or less)

Q. Is the check result normal?

Check starter (GROUP 16 - Starting System - Starter Motor Assembly Inspection ).

Repair the harness wire.

STEP 6. Check starter relay itself.

  • Check starter relay itself (Refer to GROUP 16 - Starting System - On-vehicle Service - Starter Relay Check ).

Q. Is the check result normal?
Go to Step 7 .
Replace the starter relay.

STEP 7. Check inhibitor switch itself. <A/T>

  • Check inhibitor switch itself (Refer to GROUP 23A - On-vehicle Service - Essential Service - A/T Control Component Check - Inhibitor switch Check ).

Q. Is the check result normal?
Go to Step 8 .
Replace the inhibitor switch.

STEP 8. Perform voltage measurement at A-16X starter relay connector.


  • Disconnect connector, measure the harness side.
  • Voltage between terminal No. 2 and earth.
  • Ignition switch: ST
OK: System voltage

Q. Is the check result normal?

Go to Step 9 .

Repair the harness wire.

STEP 9. Perform resistance measurement for open circuit at A-16X starter relay connector.


  • Disconnect connector, measure the harness side.
  • Resistance between terminal No. 1 and earth.
OK: Continuity (2 Ω or less)

Q. Is the check result normal?

Go to Step 10 .

Repair the harness wire.

STEP 10. Perform voltage measurement at A-16X starter relay connector.


  • Disconnect connector, measure the harness side.
  • Voltage between terminal No. 4 and earth.
OK: System voltage

Q. Is the check result normal?

Go to Step 11 .

Repair the harness wire.

STEP 11. Connector check: A-16X starter relay connector and C-103 engine-ECU connector




Q. Are the check results normal?

Go to Step 12 .

Repair or replace.

STEP 12. Perform voltage measurement at C-103 engine-ECU connector.


  • Disconnect connector, and measure at the harness side.
  • Ignition switch: ST
  • Voltage between terminal No. 103 and earth.
OK: System voltage

Q. Is the check result normal?

Go to Step 13 .


    Check intermediate connector A-115, and repair if necessary. If intermediate connector is normal, repair harness between A-16X (terminal No. 3) starter relay connector and C-103 (terminal No. 103) engine-ECU connector.

STEP 13. Check the trouble symptoms.

Q. Does trouble symptoms persist?
Replace the engine-ECU. When the engine-ECU is replaced, write the chassis number (Refer to GROUP 00 - How to Perform Chassis Number Writing ). After replacing the engine-ECU, register the injector identification code and learn fuel injection (Refer to GROUP 00 - Precautions Before Service - What The Common Rail Engine Learns ).
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).