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

Input signals from the door switches are used to operate the functions below. If the signal is abnormal, these functions will not work normally.

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 door switch (front: RH) connector, D-13 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 wiring harness from terminal No.2 of the D-01 (front: RH) or D-13 (front: LH) door switch connector or terminal No.3 of the D-05 (rear: RH) or D-12 (rear: LH) door switch connector to terminal No.51 (front: RH) of No.63 (front: LH) of No.61 (rear) of the C-219 ETACS-ECU connector.

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.