Inspection Procedure 2: The cigarette lighter does not work.


caution Before replacing the ECU, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.

OPERATION


When the ignition switch is in the ON or ACC position, the cigarette lighter can be used.

COMMENTS ON TROUBLE SYMPTOM


If the cigarette lighter cannot be used even when the ignition switch is in the ON or ACC position, ETACS-ECU, cigarette lighter itself, or cigarette lighter power supply circuit may have a problem.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III other system diagnosis code


Check if the diagnosis code is set to the ETACS-ECU.

Q. Is the check result normal?

Troubleshoot the ETACS-ECU. Refer to ETACS-ECU - Troubleshooting .

Go to Step 2.

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


Check the input signal of ACC relay. (ETACS-ECU)

Item No.
 Item name
 Normal condition
Item 288
 ACC switch
 ON
OK: Normal condition is displayed.

Q. Is the check result normal?

Go to Step 3.

Refer to ETACS - Input Signal Procedure 1 "The ignition switch (ACC) signal is not received" .

STEP 3. Cigarette lighter check


Refer to .

Q. Is the check result normal?

Go to Step 4.

Replace the cigarette lighter. Go to Step 4.

STEP 4. Voltage measurement at cigarette lighter connector (CIG1 terminal).


(1)Disconnect the connector, and measure at the wiring harness-side connector.
(2)Turn the ignition switch to the ACC position.
(3)Check the voltage between the cigarette lighter connector (CIG1 terminal) and body earth.
OK: System voltage

Q. Is the check result normal?

Go to Step 6.

Go to Step 5.

STEP 5. Check of short to power supply, short to earth, and open circuit in CIG1 line between cigarette lighter and ETACS-ECU connector.


Q. Is the check result normal?

Go to Step 6.

Repair the connector(s) or wiring harness.

STEP 6. Resistance measurement at cigarette lighter connector (earth terminal).


(1)Disconnect the connector, and measure the resistance available at the wiring harness side of the connector.
(2)Measure the resistance between the cigarette lighter connector (earth terminal) and body earth.
OK: Continuity exists (2 Ω or less)

Q. Is the check result normal?

Go to Step 8.

Go to Step 7.

STEP 7. Check of open circuit in earth line between cigarette lighter connector and body earth.


Q. Is the check result normal?

Go to Step 8.

Repair the connector(s) or wiring harness.

STEP 8. Retest the system


Check that the cigarette lighter operates normally.

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).

Replace the cigarette lighter.