Inspection Procedure O-13
Door Lock Switch Input Circuit:
Connectors:
CIRCUIT OPERATION
The ETACS-ECU uses the input signal from the door lock switch to operate the central door locking system.
TECHNICAL DESCRIPTION (COMMENT)
The door lock switch input signal is used to operate the central door locking system. If the signal fails, the door will not be locked or unlocked when the door lock switch is operated.
TROUBLESHOOTING HINTS
- Malfunction of the power window main switch or power window sub switch (door lock switch)
- 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 switch (power window main switch or power window sub switch).
Check the defective door lock switch (power window main switch or power window sub switch).
If the door lock switch (power window main switch or power window sub switch) is damaged, replace the power window main switch or power window sub switch.
The door lock switch input signal should be able to be checked and the central door locking system should work normally.
Power Window Main Switch:
If the power window main switch is not defective, go to Step 2.
Power Window Sub Switch:
If the power window sub switch is not defective, go to Step 7.
STEP 2. Check the power window main switch ground circuit at power window main switch connector E-12.
1. Disconnect power window main switch connector E-12 and measure at the harness side.
2. Resistance between terminal 9 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 power window main switch connector E-12 for damage.
If power window main switch connector E-12 is damaged, repair or replace it. Refer to Harness Connector Inspection.
The door lock switch input signal should be able to be checked and the central door locking system should work normally.
If the connector is in good condition, go to Step 4.
STEP 4. Check the harness wires between power window main switch connector E-12 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 power window main switch connector E-12 and ground are damaged, repair them.
The door lock switch input signal should be able to be checked and the central door locking system should work normally.
STEP 5. Check the power window main switch connector E-12 and ETACS-ECU connector C-112 for damage.
If the power window main switch connector E-12 and ETACS-ECU connector C-112 are damaged, repair or replace them. Refer to Harness Connector Inspection. The door lock switch input signal should be able to be checked and the central door locking system should work normally.
If the connectors are in good condition, go to Step 6.
STEP 6. Check the harness wires between power window main switch connector E-12 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 power window main switch connector E-12 and ETACS-ECU connector C-112 are damaged, repair them.
The door lock switch input signal should be able to be checked and the central door locking system should work normally.
If the harness wires are in good condition, replace the ETACS-ECU.
The door lock switch input signal should be able to be checked and the central door locking system should work normally.
STEP 7. Check the power window sub switch ground circuit at power window sub switch connector E-05.
1. Disconnect power window sub switch connector E-05 and measure at the harness side.
2. Resistance between terminal 2 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 power window sub switch connector E-05 and ETACS-ECU connector C-112 for damage.
If power window sub switch connector E-05 and ETACS-ECU connector C-112 are damaged, repair or replace them. Refer to Harness Connector Inspection.
The door lock switch input signal should be able to be checked and the central door locking system should work normally.
If the connector is in good condition, go to Step 9.
STEP 9. Check the harness wires between power window sub switch connector E-05 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 power window sub switch connector E-05 and ground repair them.
The door lock switch input signal should be able to be checked and the central door locking system should work normally.
STEP 10. Check the power window sub switch connector E-05 and ETACS-ECU connector C-112 for damage.
If the power window sub switch connector E-05 and ETACS-ECU connector C-112 are damaged, repair or replace them. Refer to Harness Connector Inspection. The door lock switch input signal should be able to be checked and the central door locking system should work normally.
If the connectors are in good condition, go to Step 11.
STEP 11. Check the harness wires between power window sub switch connector E-05 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 power window sub switch connector E-05 and ETACS-ECU connector C-112 are damaged, repair them.
The door lock switch input signal should be able to be checked and the central door locking system should work normally.
If the harness wires are in good condition, replace the ETACS-ECU.
The door lock switch input signal should be able to be checked and the central door locking system should work normally.