Inspection Procedure 4: The starter is impossible to operate <M/T>














COMMENT ON TROUBLE SYMPTOM



  • Failure is possibly caused by failed starter itself or failed related circuit.

PROBABLE CAUSES



  • Failed battery
  • Failed starter motor
  • Failed starter relay
  • Damaged harness (Circuit related to starting system has an open circuit or is earthed)
  • Damaged connector (Circuit related to starting system)

DIAGNOSIS PROCEDURE

STEP 1. Check battery voltage.

  • Measure battery voltage during cranking.
OK: 8 V 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 14 .

STEP 3. Connector check: B-14X starter relay connector.

Q. Is the check result normal?
Go to Step 4 .
Repair or replace.

STEP 4. Check starter relay itself.

  • Check starter relay itself (Refer to GROUP 16 - Starting System - On-vehicle Service - Starter Relay Check <4M4> ).

Q. Is the check result normal?
Go to Step 5 .
Replace the starter relay.

STEP 5. Perform resistance measurement for open circuit at B-14X starter relay connector and body earth.

  • Remove starter relay
  • Resistance between terminal No.1 and earth
OK: Continuity (2 Ω or less)

Q. Is the check result normal?
Go to Step 6 .
Check and repair the harness wire.

STEP 6. Perform voltage measurement at B-14X starter relay connector.

  • Disconnect connector, measure the harness side.
  • Voltage between terminal No. 3 and earth.
  • Ignition switch: ST
OK: System voltage

Q. Is the check result normal?
Go to Step 10 .
Go to Step 7 .

STEP 7. Connector check: D-309 ignition switch connector.

Q. Is the check result normal?
Go to Step 8 .
Repair or replace.

STEP 8. Check ignition switch itself.

  • Check ignition switch itself (Refer to GROUP 54A - Ignition switch - Inspection - Ignition switch inspection

Q. Is the check result normal?
Go to Step 9 .
Replace the ignition switch.

STEP 9. Connector check: B-14X starter relay connector.

Q. Is the check result normal?
Check intermediate connectors C-111, D-224 and D-226, and repair if necessary. If intermediate connectors are normal, check and repair harness between D-309 (terminal No. 5) ignition switch connector and B-14X (terminal No. 3) starter relay connector.
Repair or replace.

STEP 10. Perform voltage measurement at B-14X starter relay connector.

  • Disconnect connector, measure the harness side.
  • Voltage between terminal No. 5 and earth.
OK: System voltage

Q. Is the check result normal?
Go to Step 11 .
Check intermediate connector A-05, and repair if necessary. If intermediate connector is normal, check and repair harness between battery and B-14X (terminal No. 5) starter relay connector.

STEP 11. Connector check: B-117,B-118 starter connector.

Q. Are the check results normal?
Go to Step 12 .
Repair or replace.

STEP 12. Perform voltage measurement at B-118 starter connector.

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

Q. Is the check result normal?
Go to Step 13 .
Check and repair the harness wire.

STEP 13. Perform voltage measurement at B-117 starter connector.

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

Q. Is the check result normal?
Replace the starter.
Check intermediate connector B-20, and repair if necessary. If intermediate connector is normal, check and repair harness between B-14X (terminal No. 2) starter relay connector and B-117 (terminal No. 1) starter connector.

STEP 14. Connector check: D-309 ignition switch connector.

Q. Is the check result normal?
Go to Step 15 .
Repair or replace.

STEP 15. Check ignition switch itself.

  • Check ignition switch itself (Refer to GROUP 54A - Ignition switch - Inspection - Ignition switch inspection ).

Q. Is the check result normal?
Go to Step 16 .
Replace the ignition switch.

STEP 16. Connector check: D-215 engine-ECU connector.

Q. Is the check result normal?
Check intermediate connectors C-111, D-224 and D-226, and repair if necessary. If intermediate connectors are normal, check and repair harness between D-309 (terminal No. 5) ignition switch connector and D-215 (terminal No. 111) engine-ECU connector.
Repair or replace.