Inspection Procedure 3: The key reminder switch signal is not received.

caution

Whenever the ECU is replaced, ensure that the input signal circuit is normal.

COMMENTS ON TROUBLE SYMPTOM

Input signal from the key reminder switch is used to operate the functions below. If the signal is abnormal, these functions will not work normally.

Electric motor reminder
Central door locking
Keyless entry system
Room lamp

PROBABLE CAUSES

Malfunction of the key reminder switch
Malfunction of the ETACS-ECU
Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. Connector check: B-203 key reminder switch connector

Q. Is the check result normal?

Go to Step 2

Repair the defective connector.

STEP 2. Check the key reminder switch.

Refer to

Q. Is the check result normal?

Go to Step 3

Replace the key reminder switch.

STEP 3. Resistance measurement at the B-203 key reminder switch connector.

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

(2)Resistance between B-203 key reminder switch connector terminal No.6 and body earth
OK: Continuity exists (2 Ω or less)

Q. Is the check result normal?

Go to Step 5

Go to Step 4

STEP 4. Check the wiring harness between B-203 key reminder switch connector (terminal 6) and the body earth.

note

Prior to the wiring harness inspection, check joint connector B-04 and earth onnector B-11 repair if necessary.

Check the earth wires for open circuit.

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

Repair the wiring harness.

STEP 5. Connector check: B-317 ETACS-ECU connector

Q. Is the check result normal?

Go to Step 6

Repair the defective connector.

STEP 6. Check the wiring harness between B-317 ETACS-ECU connector (terminal 53) and B-203 key reminder switch connector (terminal 3).

Check the input line for open circuit or short circuit.

Q. Is the check result normal?

Go to Step 7

Repair the wiring harness.

STEP 7. M.U.T.-III data list

Check the input signals from the key reminder switch.

Electric motor switch: "LOCK" (OFF) (key inserted)

Item No.	Item name	Normal condition
28	Steering lock switch	OFF

OK: Normal condition is displayed.

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 ETACS-ECU and register the ID codes (Refer to

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