Inspection Procedure C-11: 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.

  • Key reminder function
  • Keyless entry system
  • Ignition key cylinder illumination lamp
  • Interior lamps

PROBABLE CAUSES

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

DIAGNOSIS PROCEDURE

STEP 1. Connector check: D-310 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 D-310 key reminder switch connector.
(1)Disconnect the connector, and measure at the wiring harness side.
(2)Resistance between D-310 key reminder switch connector terminal No.4 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 D-310 key reminder switch connector terminal No.4 and body earth.
note Prior to the wiring harness inspection, check joint connector D-34, and 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 Cope with Intermittent Malfunction ).
Repair the wiring harness.

STEP 5. Connector check: D-421 ETACS-ECU connector

Q. Is the check result normal?
Go to Step 6.
Repair the defective connector.

STEP 6. Check the wiring harness between D-310 key reminder switch connector terminal No.6 and D-421 ETACS-ECU connector terminal No.30.

  • Check the input line for open and short circuit.

Q. Is the check result normal?
Go to Step 7.
Repair the wiring harness.

STEP 7. Retest the system.
Check that the key reminder switch signal is received normally.

Q. Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
Replace the ETACS-ECU.