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INSPECTION PROCEDURE 6: The ignition key reminder function does not work normally.
 
 
cautionBefore replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
 
 
 
 
CIRCUIT OPERATION
If the key reminder function does not work normally, the input signal circuits below or the ETACS-ECU may be defective.
  • Key reminder switch
  • Driver's door switch
  • Driver's door lock actuator
 
 
TROUBLESHOOTING HINTS
  • Malfunction of the key reminder switch
  • Malfunction of the driver's door switch
  • Malfunction of the driver's door lock actuator
  • Malfunction of the ETACS-ECU
  • Damaged harness wires and connectors
 
 
DIAGNOSIS
STEP 1. Check the power supply system.
With the ignition switch in the "LOCK" (OFF) position, check if the following function operates normally:
  • Hazard warning light
Is the check result normal?
Go to Step 2.
Refer to GROUP 54A, Malfunction of ETACS-ECU Power Supply Circuit .
 
STEP 2. Using scan tool (M.U.T-III), check data list.
Check the signals related to the ignition key reminder function operation.
(1)
cautionTo prevent damage to scan tool (M.U.T-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T-III).
Connect scan tool (M.U.T-III). Refer to "How to connect scan tool (M.U.T.-III) ."
(2) Turn the ignition switch to the "ON" position.
(3) Check the data list of the ETACS.
  • Open the driver's door.
  • Change the status of driver's door from unlocked to locked.
  • Ignition switch: "LOCK" (OFF) (key inserted)
 
Item No.Item nameNormal condition
19Driver's door switchON
20Driver's door unlock switchON → OFF
21Driver's door lock switchOFF → ON
28Steering lock switchOFF
OK: Normal condition are displayed.
Are the check result normal?
<Normal conditions are displayed for all the items.> : Go to Step 3.
<Normal condition is not displayed for item No. 19.> : Refer to GROUP 54A, Inspection Procedure 5 "The front door switch (driver’s side) signal is not received. ".
<Normal condition is not displayed for item No. 20, 21.> : Refer to GROUP 54A, Inspection Procedure 4 "The front door lock actuator (driver’s side) signal is not received. ".
<Normal condition is not displayed for item No. 28.> : Refer to GROUP 54A, Inspection Procedure 3 "The key reminder switch signal is not received. ".
 
STEP 3. Retest the system.
Does the ignition key reminder function work normally?
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.