STEP 1. Using scan tool (M.U.T.-IIISE), read the DTC again.
Check again if the DTC is set in ETACS-ECU.(1) caution | To prevent damage to scan tool (M.U.T.-IIISE), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-IIISE). |
Connect scan tool (M.U.T.-IIISE). Refer to "How to connect the Scan Tool (M.U.T.-IIISE)
."
(2) Erase the DTC.
(3) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(4) On completion, check that the DTC is not set again.
Is the DTC set?
Troubleshoot the ETACS-ECU (Refer to ). Go to Step 2
STEP 2. Resistance measurement at the lighting control sensor connector.
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Measure the resistance between the lighting control sensor connector terminal ground line and the body ground.OK: The resistance should be 2 ohms or less
Is the check result normal?
Go to Step 4 Go to Step 3
STEP 3. Wiring harness check from lighting control sensor connector terminal ground line to body ground.
STEP 4. Voltage measurement at the lighting control sensor connector.
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Measure the voltage between the lighting control sensor connector terminal power supply line and the body ground.OK: Is the measured voltage approximately 12 volts (battery positive voltage)
Is the check result normal?
Go to Step 6 Go to Step 5
STEP 5. Wiring harness check between the lighting control sensor connector terminal power line and the ETACS-ECU connector terminal BUP1.
STEP 6. Using scan tool (M.U.T.-IIISE), read the DTC again.
Check again if DTC is set.(1) Erase the DTC.
(2) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(3) Check the DTC is set.
Is the DTC set?
Replace the lighting control sensor. The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).