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Inspection Procedure O-12

Driver's Or Passenger's Door Lock Actuator Switch Input Circuit:




Connectors:






CIRCUIT OPERATION
The ETACS-ECU uses the input signal from the driver's or passenger's door lock actuator switch to operate the following functions.

TECHNICAL DESCRIPTION (COMMENT)
The input signal from the driver's or passenger's door lock actuator switch is used to operate the following systems or functions. If the signal fails, these systems or function will not work normally.
- Central door locking system
- Forgotten key prevention function
- Keyless entry system
- Dome light dimming function (driver's door lock actuator switch only)
- Theft-alarm system

TROUBLESHOOTING HINTS
- Malfunction of the driver's or passenger's door latch assembly
- Malfunction of the ETACS-ECU
- Damaged harness wires or connectors

DIAGNOSIS
Required Special Tools:
MB991223: Test Harness Set
MB991502: Scan Tool (MUT-II)
MB991529: Diagnostic Trouble Code Check Harness

STEP 1. Check the door lock actuator switch.
Check the defective door lock actuator switch.
If the door lock actuator switch is damaged, replace the door latch assembly.
The input signal from the driver's and passenger's door lock actuator switch should be able to be checked and the functions, which are described in the "Technical Description (comment)," should work normally.

Driver's Door Lock Actuator Switch:




If the driver's door lock actuator switch is not defective, go to Step 2.

Passenger's Door Lock Actuator Switch:




If the passenger's door lock actuator switch is not defective, go to Step 7.




STEP 2. Check the driver's door lock actuator switch ground circuit at driver's door lock actuator switch connector E-13.
1. Disconnect driver's door lock actuator switch connector E-13 and measure at the harness side.
2. Resistance between terminal 1 and ground.
- Should be less than 2 Ohms.
If open circuit, go to Step 3.
If less than 2 Ohms, go to Step 5.




STEP 3. Check driver's door lock actuator switch connector E-13 for damage.
If driver's door lock actuator switch connector E-13 is damaged, repair or replace it. Refer to Harness Connector Inspection.
The input signal from the driver's door lock actuator switch should be able to be checked and the functions, which are described in the "Technical Description (comment)," should work normally.
If the connector is in good condition, go to Step 4.







STEP 4. Check the harness wires between driver's door lock actuator switch connector E-13 and ground.

NOTE: After checking intermediate connector C-91, check the wires. If intermediate connector C-91 is damaged, repair or replace it. Refer to Harness Connector Inspection.

If the harness wires between driver's door lock actuator switch connector E-13 and ground are damaged, repair them. The input signal from the driver's door lock actuator switch should be able to be checked and the functions, which are described in the "Technical Description (comment)," should work normally.







STEP 5. Check the driver's door lock actuator switch connector E-13 and ETACS-ECU connector C-112 for damage.
If the driver's door lock actuator switch connector E-13 and ETACS-ECU connector C-112 are damaged, repair or replace them. Refer to Harness Connector Inspection. The input signal from the driver's door lock actuator switch should be able to be checked and the functions, which are described in the "Technical Description (comment)," should work normally.
If the connectors are in good condition, go to Step 6.










STEP 6. Check the harness wires between driver's door lock actuator switch connector E-13 and ETACS-ECU connector C-112.

NOTE: After checking intermediate connector C-91, check the wires. If intermediate connector C-91 is damaged, repair or replace it. Refer to Harness Connector Inspection.

If the harness wires between driver's door lock actuator switch connector E-13 and ETACS-ECU connector C-112 are damaged, repair them.
The input signal from the driver's door lock actuator switch should be able to be checked and the functions, which are described in the "Technical Description (comment)," should work normally.

If the harness wires are in good condition, replace the ETACS-ECU.
The input signal from the driver's door lock actuator switch should be able to be checked and the functions, which are described in the "Technical Description (comment)," should work normally.




STEP 7. Check the passenger's door lock actuator switch ground circuit at passenger's door lock key cylinder switch connector E-07.
1. Disconnect passenger's door lock actuator switch connector E-07 and measure at the harness side.
2. Resistance between terminal 3 and ground.
- Should be less than 2 Ohms.
If open circuit, go to Step 8.
If less than 2 Ohms, go to Step 10.




STEP 8. Check passenger's door lock actuator switch connector E-07 for damage.
If passenger's door lock actuator switch connector E-07 is damaged, repair or replace it. Refer to Harness Connector Inspection.

The input signal from the passenger's door lock actuator switch should be able to be checked and the functions, which are described in the "Technical Description (comment)," should work normally.

If the connector is in good condition, go to Step 9.







STEP 9. Check the harness wires between passenger's door lock actuator switch connector E-07 and ground.

NOTE: After checking intermediate connector C-19, check the wires. If intermediate connector C-19 is damaged, repair or replace it. Refer to Harness Connector Inspection.

If the harness wires between passenger's door lock actuator switch connector E-07 and ground are damaged, repair them. The input signal from the passenger's door lock actuator switch should be able to be checked and the functions, which are described in the "Technical Description (comment)," should work normally.







STEP 10. Check the passenger's door lock actuator switch connector E-07 and ETACS-ECU connector C-112 for damage.
If the passenger's door lock actuator switch connector E-07 and ETACS-ECU connector C-112 are damaged, repair or replace them. Refer to Harness Connector Inspection.

The input signal from the passenger's door lock actuator switch should be able to be checked and the functions, which are described in the "Technical Description (comment)," should work normally.

If the connectors are in good condition, go to Step 11.










STEP 11. Check the harness wires between passenger's door lock actuator switch connector E-07 and ETACS-ECU connector C-112.

NOTE: After checking intermediate connector C-19, check the wires. If intermediate connector C-19 is damaged, repair or replace it Refer to Harness Connector Inspection.

If the harness wires between passenger's door lock actuator switch connector E-07 and ETACS-ECU connector C-112 are damaged, repair them.

The input signal from the passenger's door lock actuator switch should be able to be checked and the functions, which are described in the "Technical Description (comment)," should work normally.

If the harness wires are in good condition, replace the ETACS-ECU.
The input signal from the passenger's door lock actuator switch should be able to be checked and the functions, which are described in the "Technical Description (comment)," should work normally.
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