Inspection procedure C-5: One of the door switch signals is not received.


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


COMMENTS ON TROUBLE SYMPTOM




  • Lamp reminder function
  • Door ajar warning buzzer function
  • Headlamp automatic-shutdown function
  • Room lamps

PROBABLE CAUSES



  • Malfunction of the door switch (front: RH)
  • Malfunction of the door switch (front: LH)
  • Malfunction of the door switch (rear: RH) <Double cab>
  • Malfunction of the door switch (rear: LH) <Double cab>
  • Malfunction of the ETACS-ECU
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. Check the installation condition.
Check the installation state to the body of the door switches that do not receive signals.

Q. Is the check result normal?
Go to Step 2.
Correct the installation condition.

STEP 2. Connector check: D-01 <LHD> or D-13 <RHD> door switch (front: RH) connector, D-13 <LHD> or D-01 <RHD> door switch (front: LH) connector, D-05 door switch (rear: RH) connector, D-12 door switch (rear: LH) connector



Q. Is the check result normal?

Go to Step 3.

Repair the defective connector.

STEP 3. Check of the door switches that do not receive signals.
Refer to GROUP 42 - Door .

Q. Is the check result normal?
Go to Step 4.
Replace the door switch.

STEP 4. Connector check: C-219 ETACS-ECU connector


Q. Is the check result normal?

Go to Step 5.

Repair the defective connector.

STEP 5. Check the following wiring harness.





Check the wiring harness for open circuit between the following connectors:

  • Wiring harness from C-219 ETACS-ECU connector terminal No.63 to D-01 <LHD> or D-13 < RHD> door switch (front: RH) connector terminal No.2.
  • Wiring harness from C-219 ETACS-ECU connector terminal No.51 to D-13 <LHD> or D-01 <RHD> door switch (front: LH) connector terminal No.2.
  • Wiring harness from C-219 ETACS-ECU connector terminal No.61 to D-12 door switch (rear: LH) connector terminal No.2.
  • Wiring harness from C-219 ETACS-ECU connector terminal No.61 to D-05 door switch (rear: RH)connector terminal No.2.


note Prior to the wiring harness inspection, check intermediate connector C-15, and repair if necessary.

  • Check the input line for open circuit.

Q. Is the check result normal?

Go to Step 6.

Repair the wiring harness.

STEP 6. M.U.T.-III data list
Check the input signals to the door switch.

  • Open any door.
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

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 ).