Inspection Procedure O-11
Driver's or Passenger's Door Lock Key Cylinder Switch Is Not Sent to the ETACS-ECUDriver's Or Passenger's Door Lock Key Cylinder Switch Input Circuit:
Connectors:
CIRCUIT OPERATION
The ETACS-ECU uses the input signals from the driver's and passenger's door lock key cylinder switch to operate the following devices or functions.
TECHNICAL DESCRIPTION (COMMENT)
The driver's and passenger's door lock key cylinder switch input signals is used to operate the following devices or functions:
- Central door locking system
- Theft-alarm system
If the signal fails, these devices will not work normally.
TROUBLESHOOTING HINTS
- Malfunction of the driver's or passenger's door lock key cylinder switch
- Malfunction of the ETACS-ECU
- Damaged harness wires or connectors
DIAGNOSIS
Required Special Tools:
- MB991223: Test Harness Set
STEP 1. Check the location of malfunction.
Q: Which door key switch signal is not input?
Driver's door: Go to Step 2.
Passenger's door: Go to Step 8.
STEP 2. Check the driver's door lock key cylinder switch.
Q: Is the driver's door lock key cylinder switch in good condition?
YES: Go to Step 3.
NO: Replace it. The input signal from the driver's door lock key cylinder switch should be able to be checked and the functions, which are described in the "Technical Description (comment)," should work normally.
STEP 3. Check the driver's door lock key cylinder switch ground circuit at driver's door lock key cylinder switch connector E-14.
1. Disconnect driver's door lock key cylinder switch connector E-14 and measure at the harness side.
2. Measure the resistance between terminal 2 and ground.
Q: Is the resistance less than 2 ohms?
YES: Go to Step 6.
NO: Go to Step 4.
STEP 4. Check driver's door lock key cylinder switch connector E-14 for damage.
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.
Q: Is driver's door lock key cylinder switch connector E-14 in good condition?
YES: Go to Step 5.
NO: Repair or replace it. Refer to Harness Connector Inspection. The input signal from the driver's door lock key cylinder 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 harness wires between driver's door lock key cylinder switch connector E-14 and ground.
Q: Are the harness wires between driver's door lock key cylinder switch connector E-14 and ground in good condition?
YES: There is no action to be taken.
NO: Repair them. The input signal from the driver's door lock key cylinder switch should be able to be checked and the functions, which are described in the "Technical Description (comment) ," should work normally.
STEP 6. Check the driver's door lock key cylinder switch connector E-14 and ETACS-ECU connector C-112 for damage.
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.
Q: Are driver's door lock key cylinder switch connector E-14 and ETACS-ECU connector C-112 in good condition?
YES: Go to Step 7.
NO: Repair them. The input signal from the driver's door lock key cylinder 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 key cylinder switch ground circuit at driver's door lock key cylinder switch connector E-06.
1. Disconnect passenger's door lock key cylinder switch connector E-06 and measure at the harness side.
2. Measure the resistance between terminal 2 and ground.
Q: Is the resistance less than 2 ohms?
YES: Go to Step 10.
NO: Go to Step 8.
STEP 8. Check passenger's door lock key cylinder switch connector E-06 for damage.
Q: Is passenger's door lock key cylinder switch connector E-06 in good condition?
YES: Go to Step 9.
NO: Repair or replace it. Refer to Harness Connector Inspection. The input signal from the passenger's door lock key cylinder switch should be able to be checked and the functions, which are described in the "Technical Description (comment)," should work normally.
STEP 9. Check the harness wires between passenger's door lock key cylinder switch connector E-06 and ground.
NOTE: After checking intermediate connector C-95, check the wires. If intermediate connector C-95 is damaged, repair or replace it. Refer to Harness Connector Inspection.
Q: Are the harness wires between passenger a door lock key cylinder switch connector E-06 and ground in good condition?
YES: There is no action to be taken.
NO: Repair them. The input signal from the passenger's door lock key cylinder 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 key cylinder switch connector E-06 and ETACS-ECU connector C-112 for damage.
Q: Are passenger's door lock key cylinder switch connector E-06 and ETACS-ECU connector C-112 in good condition?
YES: Go to Step 13.
NO: Repair or replace them. Refer to Harness Connector Inspection. The input signal from the passenger's door lock key cylinder switch should be able to be checked and the functions, which are described in the "Technical Description (comment)," should work normally.
STEP 11. Check the harness wires between passenger's door lock key cylinder switch connector E-06 and ETACS-ECU connector C-112.
NOTE: After checking intermediate connector C-95, check the wires. If intermediate connector C-95 is damaged, repair or replace it. Refer to Harness Connector Inspection.
Q: Are the harness wires between passenger's door lock key cylinder switch connector E-06 and ETACS-ECU connector C-112 in good condition?
YES: Replace the ETACS-ECU. The input signal from the passenger's door lock key cylinder switch should be able to be checked and the functions, which are described in the "Technical Description (comment)," should work normally.
NO: Repair them. The input signal from the passengers door lock key cylinder switch should be able to be checked and the functions, which are described in the "Technical Description (comment)," should work normally.