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Inspection Procedure N-9

N-9 The driver's or front passenger's door lock actuator switch is not sent to the ETACS-ECU.
The rear door lock actuator switch is not sent ETACS-ECU.

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




Rear Door Lock Actuator Switch Input Circuit <Vehicles With Theft-alarm System Only>:




Connectors:






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

TECHNICAL DESCRIPTION (COMMENT)
The input signal from the driver's, front passenger's or rear 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 (driver's and front passenger's door lock actuator switch only)
- Forgotten key prevention function (driver's and front passenger's door lock actuator switch only)
- Keyless entry system (driver's and front passenger's door lock actuator switch only)
- Dome light dimming function (driver's door lock actuator switch only)
- Theft-alarm system

TROUBLESHOOTING HINTS
- Malfunction of the driver's, front passenger's or rear 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, front passenger's and rear 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.




Front Passenger's Door Lock Actuator Switch:




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




Rear Door Lock Actuator Switch:




If the rear door lock actuator switch (LH) is not defective, go to Step 12.
If the rear door lock actuator switch (RH) is not defective, go to Step 17.




STEP 2. Check the driver's door lock actuator switch ground circuit at driver's door lock actuator switch connector E-15.
1. Disconnect driver's door lock actuator switch connector E-15 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-15 for damage.
If driver's door lock actuator switch connector E-15 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-15 and ground.

NOTE: After checking intermediate connector C-68, check the wires. If intermediate connector C-68 is damaged, repair or replace it. Refer to Harness Connector Inspection.

If the harness wires between driver's door lock actuator switch connector E-15 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-15 and ETACS-ECU connector C-81 for damage.

If the driver's door lock actuator switch connector E-15 and ETACS-ECU connector C-81 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-15 and ETACS-ECU connector C-81.

NOTE: After checking intermediate connectors C-67 <1999 models only> and C-68, check the wires. If intermediate connectors C-67 <1999 models only> and C-68 are damaged, repair or replace them. Refer to Harness Connector Inspection.

If the harness wires between driver's door lock actuator switch connector E-15 and ETACS-ECU connector C-81 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 front passenger's door lock actuator switch ground circuit at the front passenger's door lock key cylinder switch connector E-07.
1. Disconnect the front 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 the front passenger's door lock actuator switch connector E-07 for damage.
If the front 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 front 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 front passenger's door lock actuator switch connector E-07 and ground.

NOTE: After checking intermediate connector C-72, check the wires. If intermediate connector C-72 is damaged, repair or replace it. Refer to Harness Connector inspection.

If the harness wires between front passenger's door lock actuator switch connector E-07 and ground are damaged, repair them.

The input signal from the front 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 front passenger's door lock actuator switch connector E-07 and ETACS-ECU connector C-81 for damage.
If the front passenger's door lock actuator switch connector E-07 and ETACS-ECU connector C-81 are damaged, repair or replace them. Refer to Harness Connector Inspection.

The input signal from the front 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 front passenger's door lock actuator switch connector E-07 and ETACS-ECU connector C-81.

NOTE: After checking intermediate connectors C-69 <1999 models only> and C-72, check the wires. If intermediate connectors C-69 <1999 models only> and C-72 are damaged, repair or replace them. Refer to Harness Connector Inspection.

If the harness wires between front passenger's door lock actuator switch connector E-07 and ETACS-ECU connector C-81 are damaged, repair them.

The input signal from the front 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.




STEP 12. Check the rear door lock actuator switch (LH) ground circuit at the rear door lock key cylinder switch (LH) connector E-11.
1. Disconnect the rear door lock actuator switch (LH) connector E-07 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 13.
If less than 2 Ohms, go to Step 15.




STEP 13. Check the rear door lock actuator switch (LH) connector E-11 for damage.
If the rear door lock actuator switch (LH) connector E-11 is damaged, repair or replace it. Refer to Harness Connector Inspection.

The input signal from the rear door lock actuator switch (LH) should be able to be checked and the Theft-alarm system should work normally.

If the connector is in good condition, go to Step 14.







STEP 14. Check the harness wires between rear door lock actuator switch (LH) connector E-11 and ground.

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

If the harness wires between rear door lock actuator switch (LH) connector E-11 and ground are damaged, repair them.

The input signal from the rear door lock actuator switch (LH) should be able to be checked and the Theft-alarm system should work normally.







STEP 15. Check the rear door lock actuator switch (LH) connector E-11 and ETACS-ECU connector C-81 for damage.
If the rear door lock actuator switch connector E-11 and ETACS-ECU connector C-81 are damaged, repair or replace them. Refer to Harness Connector Inspection.

The input signal from the rear door lock actuator switch should be able to be checked and the Theft-alarm system should work normally.

If the connectors are in good condition, go to Step 16.













STEP 16. Check the harness wires between rear door lock actuator switch (LH) connector E-11 and ETACS-ECU connector C-81.

NOTE: After checking intermediate connectors C-67 and D-19, check the wires. If intermediate connectors C-67 and D-19 are damaged, repair or replace them. Refer to Harness Connector Inspection.

If the harness wires between rear door took actuator switch (LH) connector E-11 and ETACS-ECU connector C-81 are damaged, repair them.

The input signal from the rear door lock actuator switch (LH) should be able to be checked and the theft-alarm system should work normally.

If the harness wires are in good condition, replace the ETACS-ECU.

The input signal from the rear door lock actuator switch (LH) should be able to be checked and the theft-alarm system should work normally.




STEP 17. Check the rear door lock actuator switch (RH) ground circuit at the rear door lock key cylinder switch (RH) connector E-10.
1. Disconnect the rear door lock actuator switch (RH) connector E-10 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 18.
If less than 2 Ohms, go to Step 20.




STEP 18. Check the rear door lock actuator switch (RH) connector E-10 for damage.
If the rear door lock actuator switch (RH) connector E-10 is damaged, repair or replace it. Refer to Harness Connector Inspection.

The input signal from the rear door lock actuator switch (RH) should be able to be checked and the Theft-alarm system should work normally.

If the connector is in good condition, go to Step 19.







STEP 19. Check the harness wires between rear door lock actuator switch (RH) connector E-10 and ground.

NOTE: After checking intermediate connector D-07, check the wires. If intermediate connector D-07 is damaged, repair or replace it. Refer to Harness Connector Inspection.

If the harness wires between rear door lock actuator switch (RH) connector E-10 and ground are damaged, repair them.

The input signal from the rear door lock actuator switch (RH) should be able to be checked and the Theft-alarm system should work normally.







STEP 20. Check the rear door lock actuator switch (RH) connector E-10 and ETACS-ECU connector C-81 for damage.
If the rear door lock actuator switch (RH) connector E-10 and ETACS-ECU connector C-81 are damaged, repair or replace them. Refer to Harness Connector Inspection.

The input signal from the rear door lock actuator switch should be able to be checked and the Theft-alarm system should work normally.

If the connectors are in good condition, go to Step 21.













STEP 21. Check the harness wires between rear door lock actuator switch (RH) connector E-10 and ETACS-ECU connector C-81.

NOTE: After checking intermediate connectors C-69 <1999 models>, C-71 <2000 models> and D-07, check the wires. If intermediate connectors C-69 <1999 models>, C-71 <2000 models> and D-07 are damaged, repair or replace them. Refer to Harness Connector Inspection.

If the harness wires between rear door lock actuator switch (RH) connector E-10 and ETACS-ECU connector C-81 are damaged, repair them.

The input signal from the rear door lock actuator switch (RH) should be able to be checked and the theft-alarm system should work normally.

If the harness wires are in good condition, replace the ETACS-ECU.

The input signal from the rear door lock actuator switch (RH) should be able to be checked and the theft-alarm system should work normally.
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