Inspection Procedure 1: The accessory socket does not work. <Vehicles with accessory socket>

caution

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

OPERATION

note

The maximum load of accessory socket is 120 W.

COMMENTS ON TROUBLE SYMPTOM

PROBABLE CAUSES

Malfunctions of accessory socket
Malfunction of the ETACS-ECU
Damaged harness wires and connectors

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)

Turn the ignition switch to the ACC position.

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 sent to the ETACS-ECU" .

STEP 3. Connector check: C-315 ETACS-ECU connector, C-51 accessory socket connector

Q. Is the check result normal?

	Go to Step 4.

	Repair the defective connector.

STEP 4. Voltage measurement at C-51 accessory socket connector.

(1)Disconnect the connector, and measure at the wiring harness-side connector.

(2)Turn the ignition switch to the "ACC" or "ON" position.

(3)Voltage between C-51 accessory socket connector terminal No.2 and the body earth
OK: System voltage

Q. Is the check result normal?

	Go to Step 6.

	Go to Step 5.

STEP 5. Check the wiring harness between C-51 accessory socket connector terminal No.2 and C-315 ETACS-ECU connector terminal No.3.

Check the power supply lines (battery power supply) for open circuit and short circuit.

Q. Is the check result normal?

	Go to Step 6.

	Repair the wiring harness.

STEP 6. Resistance measurement at C-51 accessory socket connector.

(1)Disconnect the connector, and measure the resistance available at the wiring harness side of the connector.

(2)Check the continuity between terminal No.1 and body earth.
OK: Continuity exists (2 ohms or less)

Q. Is the check result normal?

	Go to Step 8.

	Go to Step 7.

STEP 7. Check the wiring harness between C-51 accessory socket connector terminal No.1 and body earth.

Check the body earth wires for open circuit.

Q. Is the check result normal?

	Go to Step 8.

	Repair the wiring harness.

STEP 8. Retest the system

Check if the accessory socket power is turned ON.

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 accessory socket.