STEP 1. Check of the fuse No.13 and No.15.
STEP 2. Check the wiring harness between electronic control coupling solenoid (front) connector and AWC-ECU connector terminal FSL+.
STEP 3. Check the wiring harness between electronic control coupling solenoid (front) connector and AWC-ECU connector terminal FSL-.
STEP 4. Check the wiring harness between electronic control coupling solenoid (center) connector and AWC-ECU connector terminal SOL+.
STEP 5. Check the wiring harness between electronic control coupling solenoid (center) connector and AWC-ECU connector terminal SOL-.
STEP 6. Check of the electronic control coupling solenoid (front)
STEP 7. Check of the electronic control coupling solenoid (center)
STEP 8. Check the wiring harness between ETACS-ECU connector and AWC-ECU connector terminal BATT
STEP 9. Check the wiring harness between ETACS-ECU connector and AWC-ECU connector terminal IG1
STEP 10. Voltage measurement at ETACS-ECU connector
STEP 11. Check the wiring harness between ETACS-ECU connector terminal +B1 and fusible link No.2
STEP 12. Voltage measurement at the ETACS-ECU connector
(1) Disconnect the connector, and measure the voltage between terminal IG1 and body ground at the wiring harness side.
(2) Turn the ignition switch to the ON position.OK: Battery positive voltage
Is the check result normal?
Go to Step 14. Go to Step 13.
STEP 13. Check the wiring harness between ETACS-ECU connector terminal IG1 and J/C(2).
STEP 14. Voltage measurement at the AWC-ECU connector
STEP 15. Check the wiring harness between ETACS-ECU connector and AWC-ECU connector terminal BATT.
STEP 16. Voltage measurement at the AWC-ECU connector
(1) Disconnect the connector, and measure the voltage between terminal IG1 and body ground at the wiring harness side.
(2) Turn the ignition switch to the ON position.OK: Battery positive voltage
Is the check result normal?
Go to Step 18. Go to Step 17.
STEP 17. Check the wiring harness between ETACS-ECU connector terminal IG1 and AWC-ECU connector terminal IG1.
STEP 18. Measure the resistance at the AWC-ECU connector.
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Resistance between AWC-ECU connector terminal GND1 and body ground.OK: Continuity exists (2 Ω or less)
Is the check result normal?
Go to Step 20. Go to Step 19.
STEP 19. Check the wiring harness between AWC-ECU connector terminal GND1 and body ground.
STEP 20. Retest the system.
STEP 21. Retest the system.
STEP 22. Retest the system.