Inspection procedure 13: The Door-ajar Warning Lamp does not Illuminate.


caution Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.


COMMENTS ON TROUBLE SYMPTOM




  • Ignition switch (IG1)
  • Driver’s door switch
  • Passenger’s door switch
  • Rear door switch
  • Vehicle speed signal

PROBABLE CAUSES



  • Malfunction of the front door switch (RH)
  • Malfunction of the front door switch (LH)
  • Malfunction of the rear door switch (RH)
  • Malfunction of the rear door switch (LH)
  • Malfunction of the tailgate switch
  • Malfunction of the ETACS-ECU
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics
Use the M.U.T.-III to diagnose the CAN bus lines.

Q. Is the check result normal?
Go to Step 2.
Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting ). On completion, go to Step 5.

STEP 2. Check the diagnosis code of the engine-ECU.
Check if the diagnosis code is set in either of the engine-ECU.

Q. Is the diagnosis code set?
Diagnose the engine-ECU (Refer to GROUP 13A - Troubleshooting . On completion, go to Step 4.
Go to Step 3.

STEP 3. M.U.T.-III data list
Check the input signals below, which are related to the door-ajar warning lamp function.

  • Turn the ignition switch to the "LOCK" (OFF) position.
  • Open any door (including tailgate).
Item No.
 Item name
 Normal condition
19
 Drive’s door switch
 Any of them becomes ON.
48
 Passenger’s door switch
49
 Rear door switch
30
 Ignition switch(IG1)
 OFF
OK: Normal conditions are displayed for all the items.

Q. Is the check result normal?
YES <All the signals are received normally.> : Go to Step 4.
NO <The driver’s door switch signal is not received.> : Refer to inspection procedure C-5 "One of the door switch signals is not received ."
NO <The passenger’s door switch signal is not received.> : Refer to inspection procedure C-5 "One of the door switch signals is not received ."
NO <The rear door switch signal is not received.> : Refer to inspection procedure C-5 "One of the door switch signals is not received ."
NO <The ignition switch (IG1) signal is not received.> : Refer to inspection procedure C-3 "The ignition switch (IG1) signal is not received ."

STEP 4. Check the combination meter

Q. Does the combination meter work?
Go to Step 5.
Refer to symptom procedure 1 "Power Supply Circuit System Check ."

STEP 5. Connector check: C-113 combination meter connector and C-219 ETACS-ECU connector




Q. Is the check result normal?

Go to Step 6.

Repair the defective connector.

STEP 6. Check the wiring harness from C-113 combination meter connector terminal No.2 to C-219 ETACS-ECU connector terminal No.55.





  • Check the output lines for open circuit.

Q. Is the check result normal?

Go to Step 7.

Repair the wiring harness.

STEP 7. Retest the system.
The door-ajar warning lamp function should work normally.

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.