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.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE


STEP 1. Check the key reminder switch.


Refer to .

Q. Is the check result normal?

Go to Step 2.

Replace the key reminder switch (Refer to Ignition Switch ).

STEP 2. Resistance measurement at key reminder switch connector (earth terminal)


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

Q. Is the check result normal?

Go to Step 4.

Go to Step 3.

STEP 3. Check of open circuit in earth line between key reminder switch connector and the body earth


Q. Is the check result normal?

Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).

Repair the connector(s) or wiring harness.

STEP 4. Check of short to power supply, short to earth, and open circuit in HL1+ line between ETACS-ECU connector and key reminder switch connector


Q. Is the check result normal?

Go to Step 5.

Repair the connector(s) or wiring harness.

STEP 5. M.U.T.-III data list


Check the input signals from the key reminder switch.

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 (Refer to ).