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Body Control Systems: Other Lexus RX I

Body, Cab Control Systems 5 illustrations ~3720 words

SYSTEM TESTS

Symptom & DescriptionPerform Test No.
Lock Or Unlock Cannot Be Operated With Door Lock Control Switch
Driver's Passenger's Or Door ECU(1)
Body Control ECU(2)
Door Key Link Function Does Not Operate
Driver's Or Passenger's Door ECU(1)
Body Control ECU(2)
Key Confinement Prevention Function Does Not Operate
Key Unlock Warning Switch Circuit15
Body Control ECU(2)
(1) See appropriate wiring diagram in POWER DOOR LOCKS, TRUNK LID & FUEL DOOR RELEASE article. (2) Perform BODY CONTROL ECU PIN VOLTAGE TESTS under COMPONENT TESTS.
(1)See appropriate wiring diagram in POWER DOOR LOCKS, TRUNK LID & FUEL DOOR RELEASE article.
(2)Perform BODY CONTROL ECU PIN VOLTAGE TESTS under COMPONENT TESTS.

SYMPTOM INDEX (DOOR LOCK CONTROL SYSTEM)

Symptom & DescriptionPerform Test No.
Wireless Door Lock Control System Does Not Operate (1)
Key Unlock Warning Switch Circuit15
Wireless Door Lock Tuner Circuit38
Wireless Door Lock Transmitter39
Body Control ECU(2)
Lock Or Unlock Function Does Not Operate
Driver's Door Unlock Detection Switch Circuit7
Left Rear Door Unlock Detection Switch Circuit18
Passenger's Door Unlock Detection Switch Circuit25
Right Rear Door Unlock Detection Switch Circuit33
Driver's Or Passenger's Door ECU(3)
Left Or Right Rear Door ECU(3)
Body Control ECU(2)
Auto Lock Function Operates When Any Door Is Opened Within 30 Seconds After Unlocking All Doors With Wireless Door Lock Control System
Driver's Door Courtesy Light & Courtesy Switch Circuit4
Left Rear Door Courtesy Light & Courtesy Switch Circuit16
Passenger's Door Courtesy Light & Courtesy Switch Circuit21
Right Rear Door Courtesy Light & Courtesy Switch Circuit31
Driver's Or Passenger's Door ECU(3)
Left Or Right Rear Door ECU(3)
Body Control ECU(2)
Wireless Door Lock Operates, But Buzzer Does Not Sound
Wireless Door Lock Buzzer Circuit38
Body Control ECU(2)
Buzzer Sounds, But Wireless Door Lock Function Does Not Operate (1)
Body Control ECU(2)
(1) Check transmitter operation. (2) Perform BODY CONTROL ECU PIN VOLTAGE TESTS under COMPONENT TESTS. (3) See appropriate wiring diagram in POWER DOOR LOCKS, TRUNK LID & FUEL DOOR RELEASE article.
(1)Check transmitter operation.
(2)Perform BODY CONTROL ECU PIN VOLTAGE TESTS under COMPONENT TESTS.
(3)See appropriate wiring diagram in POWER DOOR LOCKS, TRUNK LID & FUEL DOOR RELEASE article.

SYMPTOM INDEX (WIRELESS DOOR LOCK CONTROL SYSTEM)

Symptom & DescriptionPerform Test No.
System Cannot Be Set
Anti-Theft Indicator Circuit2
Back Door Courtesy Switch Circuit3
Driver's Door Courtesy Light & Courtesy Switch Circuit4
Driver's Door Unlock Detection Switch Circuit7
Engine Hood Courtesy Switch Circuit10
Key Unlock Warning Switch Circuit15
Left Rear Door Courtesy Light & Courtesy Switch Circuit16
Left Rear Door Unlock Detection Switch Circuit18
Passenger's Door Courtesy Light & Courtesy Switch Circuit21
Passenger's Door Unlock Detection Switch Circuit25
Right Rear Door Courtesy Light & Courtesy Switch Circuit31
Right Rear Door Unlock Detection Switch Circuit33
Driver's Or Passenger's Door ECU(1)
Left Or Right Rear Door ECU(1)
Body Control ECU(2)
System Cannot Be Canceled When Ignition Is In ON Position
Key Unlock Warning Switch Circuit15
Ignition Switch Circuit(3)
Body Control ECU(2)
System Does Not Cancel When Back Door Is Opened With Key
Back Door Key Lock & Unlock Switch Circuit3
Body Control ECU(2)
Headlights Do Not Operate Properly With System
Headlight Relay Circuit13
Body Control ECU(2)
Taillights Do Not Operate Properly With System
Taillight Relay Circuit36
Body Control ECU(2)
Anti-Theft Horn & Standard Horn Does Not Sound
Anti-Theft Horn Circuit1
Standard Horn Circuit34
Body Control ECU(2)
Hazards Do Not Operate Properly With System
Hazard Switch Circuit11
Body Control ECU(2)
During Warning Condition, System Cannot Be Canceled By Unlocking Door With Key
Driver's Door Key Lock & Unlock Switch Circuit5
Passenger's Door Key Lock & Unlock Switch Circuit22
Driver's Or Passenger's Door ECU(1)
Body Control ECU(2)
During Warning Condition, System Cannot Be Canceled By Unlocking Door With Transmitter
Wireless Door Lock Transmitter(4)
Wireless Door Lock Tuner Circuit39
Body Control ECU(2)
During Warning Condition, System Cannot Be Canceled By Turning Ignition To ACC Or ON Position Using Key
Ignition Switch Circuit(3)
Key Unlock Warning Switch Circuit15
Body Control ECU(2)
Horns Sounded For More Than 60 Seconds
Body Control ECU(2)
(1) See appropriate wiring diagram in POWER DOOR LOCKS, TRUNK LID & FUEL DOOR RELEASE article. (2) Perform BODY CONTROL ECU PIN VOLTAGE TESTS under COMPONENT TESTS. (3) Check ignition switch. See STEERING COLUMN SWITCHES article. (4) Check transmitter operation.
(1)See appropriate wiring diagram in POWER DOOR LOCKS, TRUNK LID & FUEL DOOR RELEASE article.
(2)Perform BODY CONTROL ECU PIN VOLTAGE TESTS under COMPONENT TESTS.
(3)Check ignition switch. See STEERING COLUMN SWITCHES article.
(4)Check transmitter operation.

SYMPTOM INDEX (ANTI-THEFT SYSTEM)

Symptom & DescriptionPerform Test No.
Rear Wipers Do Not Operate
Rear Wiper Motor Circuit28
Wiper/Washer Switch Circuit37
Body Control ECU(1)
Rear Washers Do Not Operate
Rear Washer Motor Circuit28
Wiper/Washer Switch Circuit37
Wiring Harness(2)
(1) Perform BODY CONTROL ECU PIN VOLTAGE TESTS under COMPONENT TESTS. (2) Check wiring harness for opens or shorts. See WIRING DIAGRAMS in appropriate WIPER/WASHER SYSTEMS article. Repair or replace as necessary, and retest system operation.
(1)Perform BODY CONTROL ECU PIN VOLTAGE TESTS under COMPONENT TESTS.
(2)Check wiring harness for opens or shorts. See WIRING DIAGRAMS in appropriate WIPER/WASHER SYSTEMS article. Repair or replace as necessary, and retest system operation.

SYMPTOM INDEX (REAR WIPER/WASHER SYSTEM)

Symptom & DescriptionPerform Test No.
Automatic Light Control Does Not Operate
Headlight Control Switch Circuit12
Light Sensor Circuit19
Body Control ECU(1)
Automatic Turn Off Does Not Operate
Driver's Door Courtesy Switch Circuit4
Ignition Switch(2)
Driver's Door ECU(1)
Body Control ECU(3)
(1) See appropriate wiring diagram in POWER DOOR LOCKS, TRUNK LID & FUEL DOOR RELEASE article. (2) Check ignition switch. See STEERING COLUMN SWITCHES article. (3) Perform BODY CONTROL ECU PIN VOLTAGE TESTS under COMPONENT TESTS.
(1)See appropriate wiring diagram in POWER DOOR LOCKS, TRUNK LID & FUEL DOOR RELEASE article.
(2)Check ignition switch. See STEERING COLUMN SWITCHES article.
(3)Perform BODY CONTROL ECU PIN VOLTAGE TESTS under COMPONENT TESTS.

SYMPTOM INDEX (LIGHT CONTROL SYSTEM)

Symptom & DescriptionPerform Test No.
Illuminated Entry Does Not Operate Properly
Illumination Circuit14
Body Control ECU(1)
(1) Perform BODY CONTROL ECU PIN VOLTAGE TESTS under COMPONENT TESTS.
(1)Perform BODY CONTROL ECU PIN VOLTAGE TESTS under COMPONENT TESTS.

SYMPTOM INDEX (ILLUMINATED ENTRY CONTROL SYSTEM)

Symptom & DescriptionPerform Test No.
A/C Control Panel & Multi Display Does Not Deteriorate
Rheostat Light Control Circuit30
Body Control ECU(1)
Body Control ECU Does Not Operate
ECU Power Source Circuit9
Body Control ECU(1)
(1) Perform BODY CONTROL ECU PIN VOLTAGE TESTS under COMPONENT TESTS.
(1)Perform BODY CONTROL ECU PIN VOLTAGE TESTS under COMPONENT TESTS.

SYMPTOM INDEX (MISCELLANEOUS)

Note. If LEXUS scan tool is available for the following circuit tests, connect scan tool to Data Link Connector 3 (DLC3) located under left side of instrument panel.

ANTI-THEFT HORN

Disconnect anti-theft horn connector (located in right rear corner of engine compartment). Connect battery positive lead to terminal No. 1 (Light Green/Black wire) and negative battery lead to horn body. See WIRING DIAGRAMS . If horn does not operate, replace horn. If horn operates, repair or replace wire harness and connectors between anti-theft horn, body control ECU and ground.

ANTI-THEFT INDICATOR

Disconnect indicator light 3-pin connector. Connect battery positive lead to terminal No. 3 (Light Green wire) and negative battery lead to terminal No. 1 (White/Black wire). See WIRING DIAGRAMS . If indicator light does not come on, replace light control rheostat and retest system operation. If indicator light comes on, repair or replace wire harness and connectors between indicator light and body control ECU.

BACK DOOR COURTESY SWITCH

Remove back door courtesy switch. Using an ohmmeter, check continuity between back door courtesy switch terminals. Continuity should exist with switch pin released. Continuity should not exist with switch pin pressed. If continuity is not as specified, replace courtesy switch and retest system operation.

BODY CONTROL ECU PIN VOLTAGE TESTS

Note. Perform this procedure only after performing tests listed in appropriate SYMPTOM DIAGNOSIS table under TROUBLE SHOOTING and system still does not operate properly. See TROUBLE SHOOTING .

Turn ignition on. Using DVOM, measure voltage by backprobing between the following body control ECU connector terminals. (Scheme 3) If voltages are not as specified, repair wiring harness or replace components as necessary. If voltages are as specified, replace body control ECU.

  1. B5-1 (Blue/Black Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With back door motor activated to lock, voltage should be less than one volt. With back door motor not operated, voltage should be 10-14 volts.
  2. B5-2 (Gray/Black Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) During all conditions, voltage should be 10-14 volts.
  3. B5-3 (Blue Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With rear wiper switch in OFF position, voltage should be less than one volt. With rear wiper switch in ON position and ignition switch in ON position, voltage should be 10-14 volts.
  4. B5-4 (Blue/White Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With ignition switch in OFF position, voltage should be less than one volt. With ignition switch in ON position, voltage should be 10-14 volts.
  5. B5-5 (Light Green/Black Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With anti-theft system set, back door key lock and unlock switch off and back door open, voltage should change from 10-14 volts to less than one volt.
  6. B5-6 (Blue/Red Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With back door lock motor activated to unlock, voltage should be less than one volt. With back door lock motor not operated, voltage should be 10-14 volts.
  7. B5-7 (Blue/Orange Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With rear wiper operated, voltage should be 10-14 volts. With rear wiper stopped, voltage should be less than one volt.
  8. B5-8 (Blue/Yellow Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With ignition switch in OFF position, voltage should be less than one volt. With ignition switch in ON position, voltage should be 10-14 volts.
  9. B5-9 (White/Black Wire) & Body Ground During all conditions, voltage should be less than one volt.
  10. B5-12 (Red Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With light control switch in OFF or TAIL position, voltage should be 10-14 volts. With light control switch in HEAD position, voltage should be less than one volt.
  11. B5-14 (Gray/Yellow Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With engine running and parking brake switch in OFF position, voltage should be less than one volt. With engine running and parking brake switch in ON position or light control switch in HEAD position, voltage should be 10-14 volts.
  12. B5-15 (Red/Blue Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With light control switch in OFF or TAIL position, voltage should be 10-14 volts. With light control switch in HEAD position, voltage should be less than one volt.
  13. B5-16 (Gray/Red Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With light control switch in OFF position, voltage should be 10-14 volts. With light control switch in TAIL or HEAD position, voltage should be less than one volt.
  14. B5-17 (Green Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With back door locked, voltage should be 10-14 volts. With back door unlocked, voltage should be less than one volt.
  15. B6-4 (Pink Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With light control switch in any position except AUTO, voltage should be less than one volt. With light control switch in AUTO position, voltage should be 10-14 volts.
  16. B6-5 (Red/White Wire) & Body Ground With headlight dimmer switch in LOW position, voltage should be 10-14 volts. With headlight dimmer switch in HI or FLASH position, voltage should be less than one volt.
  17. B6-7 (Gray/Yellow Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With headlight dimmer switch in LOW position and fog light switch in OFF position, voltage should be 10-14 volts. With headlight dimmer switch in LOW position and fog light switch in ON position, voltage should be less than one volt.
  18. B6-10 (White/Red Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With horn switch in OFF position, voltage should be 10-14 volts. With horn switch in ON position, voltage should be less than one volt.
  19. B6-15 (Blue/Yellow Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With wireless door lock operated, voltage should be 4-5 volts. With wireless door lock not operated, voltage should change from 4-5 volts to less than one volt.
  20. B6-18 (Light Green/Red Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With back door key lock and unlock switch in OFF or LOCK position, voltage should be 10-14 volts. With back door key lock and unlock switch in UNLOCK position, voltage should be less than one volt.
  21. B6-19 (Blue/White Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With back door key lock and unlock switch in OFF or UNLOCK position, voltage should be 10-14 volts. With back door key lock and unlock switch in LOCK position, voltage should be less than one volt.
  22. B7-2 (Gray Wire) & B7-3 (Light Green Wire) With wireless door lock buzzer sounding, voltage should be 10-14 volts. With wireless door lock buzzer not sounding, voltage should be less than one volt.
  23. B7-5 (White/Red Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With back door courtesy light switch in OFF position (closed), voltage should be 10-14 volts. With back door courtesy light switch in ON position (open), voltage should be less than one volt.
  24. B7-6 (White/Blue Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With engine hood courtesy light switch in OFF position (closed), voltage should be 10-14 volts. With engine hood courtesy light switch in ON position (open), voltage should be less than one volt.
  25. B7-7 (Gray/White Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With driver's seat belt buckle switch in OFF position (belt fastened), voltage should be 10-14 volts. With driver's seat belt buckle switch in ON position (belt unfastened), voltage should be less than one volt.
  26. B7-8 (Blue Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With key inserted in ignition, voltage should be less than one volt. With key not inserted in ignition, voltage should be 10-14 volts.
  27. B7-9 (Blue/Orange Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With ignition switch in ON position and blower motor not operating, voltage should 10-14 volts. With ignition switch in ON position and blower motor operating, voltage should be less than one volt.
  28. B7-10 (Red/Yellow Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With each door open, voltage should be less than 2 volts. With all doors closed, voltage should be 10-14 volts.
  29. B7-12 (Green/Blue Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With ignition switch in ON position and rear wiper switch in OFF, WASH1 or INT position, voltage should be 10-14 volts. With ignition switch in ON position and rear wiper switch in ON or WASH2 position, voltage should be less than one volt.
  30. B7-13 (Blue/Yellow Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With ignition switch in ON position and rear wiper switch in OFF, ON or INT position, voltage should be 10-14 volts. With ignition switch in ON position and rear wiper switch in WASH1 or WASH2 position, voltage should be less than one volt.
  31. B7-17 (Red/White Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With ignition switch in ON position and brake fluid warning switch in ON position, voltage should be less than one volt. With ignition switch in ON position and brake fluid warning switch in OFF position, voltage should be 10-14 volts.
  32. B7-18 (Gray/Orange Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With stoplight switch in OFF position, voltage should be less than one volt. With stoplight switch in ON position, voltage should be 10-14 volts.
  33. B7-19 (Red/Blue Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With ignition switch in ON position and parking brake switch in OFF position, voltage should be 10-14 volts. With ignition switch in ON position and parking brake switch in ON position, voltage should be less than one volt.
  34. B7-20 (Red Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With headlight dimmer switch in LOW or HI position, voltage should be 10-14 volts. With headlight dimmer switch in FLASH position, voltage should be less than one volt.
  35. B7-21 (Green/Red Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With ignition switch in ON position and rear wiper switch in any position except INT, voltage should be 10-14 volts. With ignition switch in ON position and rear wiper switch in INT position, voltage should be less than one volt.
  36. B8-2 (White/Black Wire) & Body Ground During all conditions, voltage should be less than one volt.
  37. B8-4 (Blue/Black Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) During all conditions, voltage should be 10-14 volts.
  38. B8-5 (Red/Blue Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With ignition switch in ACC or OFF position, voltage should be less than one volt. With ignition switch in ON position, voltage should be 10-14 volts.
  39. B8-6 (Brown/White Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With fog light switch in OFF position, voltage should be 10-14 volts. With fog light switch in ON position, voltage should be less than one volt.
  40. B8-7 (Gray/White Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With ignition switch in ON position and light control switch in OFF position, voltage should be 10-14 volts. With ignition switch in ON position and light control switch in TAIL position, voltage should be less than one volt.
  41. B8-11 (Light Green/Black Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With hazard warning switch in OFF position, voltage should be 10-14 volts. With hazard warning switch in ON position, voltage should be less than one volt.
  42. B8-15 (Yellow/Black Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With pattern select switch in SNOW position, voltage should be less than one volt. With pattern select switch in any position except SNOW and ignition switch in ON position, voltage should be 10-14 volts.
  43. B8-16 (Light Green Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With anti-theft indicator light illuminated, voltage should be 3-6 volts. Without anti-theft indicator light illuminated, voltage should be less than one volt.
  44. B8-17 (Brown/Yellow Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With rear defogger switch in OFF position, voltage should be 10-14 volts. With rear defogger switch in ON position, voltage should be less than one volt.
  45. B8-18 (Green Wire) & B5-9 (White/Black Wire); B8-2 (White/Black Wire) With ignition switch in OFF position, voltage should be less than one volt. With ignition switch in ACC position, voltage should be 10-14 volts.

Scheme 3

Scheme 3
Scheme 3

DOOR COURTESY LIGHT

Remove door courtesy light. Using an ohmmeter, check continuity between courtesy light bulb terminals. Continuity should exist. If continuity does not exist, replace courtesy light bulb and retest system operation.

DOOR COURTESY SWITCH

Remove door courtesy switch. Using an ohmmeter, check continuity between courtesy switch terminals. Continuity should exist with switch pin released. Continuity should not exist with switch pin pressed. If continuity is not as specified, replace courtesy switch and retest system operation.

Back Door

  1. Remove door trim panel and service hole cover. Disconnect 3-pin electrical connector from door key lock and unlock switch. Connect ohmmeter between terminals No. 1 (White/Black wire) and No. 2 (Blue/White wire) of door key lock and unlock switch connector (component side). See «WIRING DIAGRAMS»(ref-8993-S32970494742000093000000) . When door is locked, continuity should exist. When door is unlocked, continuity should not exist.
  2. Connect ohmmeter between terminals No. 1 (White/Black wire) and No. 3 (Light Green/Red wire) of door key lock and unlock switch connector (component side). When door is unlocked, continuity should exist. When door is locked, continuity should not exist. If continuity is not as specified, replace door key lock and unlock switch and retest system operation.

Left Front Door

  1. Remove door trim panel and service hole cover. Disconnect 6-pin electrical connector from door lock motor. Connect ohmmeter between terminals No. 3 (Gray/Red wire) and No. 5 (Pink wire) of door lock motor connector (component side). See «WIRING DIAGRAMS»(ref-8993-S32970494742000093000000) . When door is locked, continuity should exist. When door is unlocked, continuity should not exist.
  2. Connect ohmmeter between terminals No. 3 (Gray/Red wire) and No. 6 (Pink/Blue wire) of door lock motor connector (component side). When door is unlocked, continuity should exist. When door is locked, continuity should not exist. If continuity is not as specified, replace door key lock and unlock switch and retest system operation.

Right Front Door

  1. Remove door trim panel and service hole cover. Disconnect 6-pin electrical connector from door lock motor. Connect ohmmeter between terminals No. 3 (Gray wire) and No. 2 (Pink wire) of door lock motor connector (component side). See «WIRING DIAGRAMS»(ref-8993-S32970494742000093000000) . When door is locked, continuity should exist. When door is unlocked, continuity should not exist.
  2. Connect ohmmeter between terminals No. 3 (Gray wire) and No. 1 (Pink/Blue wire) of door lock motor connector (component side). When door is unlocked, continuity should exist. When door is locked, continuity should not exist. If continuity is not as specified, replace door key lock and unlock switch and retest system operation.

Remove door trim panel and service hole cover. Disconnect 4-pin electrical connector from door lock motor. Connect positive battery lead to door lock motor connector (component side) terminal No. 3 (Blue/Red wire) and negative battery lead to terminal No. 2 (Blue/Black wire). See WIRING DIAGRAMS . Door lock link should move to unlock position. Reverse battery leads (polarity). Door lock link should move to lock position. If door lock motor does not operate as specified, replace door lock motor and retest system operation.

Remove door trim panel and service hole cover. Disconnect 6-pin electrical connector from door lock motor. Connect positive battery lead to door lock motor connector (component side) terminal No. 1 (Blue/Yellow wire) and negative battery lead to terminal No. 2 (Blue/Red wire). See WIRING DIAGRAMS . Door lock link should move to unlock position. Reverse battery leads (polarity). Door lock link should move to lock position. If door lock motor does not operate as specified, replace door lock motor and retest system operation.

Left Rear Door

Remove door trim panel and service hole cover. Disconnect 4-pin electrical connector from door lock motor. Connect positive battery lead to door lock motor connector (component side) terminal No. 1 (Blue/Black wire) and negative battery lead to terminal No. 2 (Blue/Red wire). See WIRING DIAGRAMS . Door lock link should move to unlock position. Reverse battery leads (polarity). Door lock link should move to lock position. If door lock motor does not operate as specified, replace door lock motor and retest system operation.

Remove door trim panel and service hole cover. Disconnect 6-pin electrical connector from door lock motor. Connect positive battery lead to door lock motor connector (component side) terminal No. 5 (Blue/Yellow wire) and negative battery lead to terminal No. 6 (Blue/Red wire). See WIRING DIAGRAMS . Door lock link should move to unlock position. Reverse battery leads (polarity). Door lock link should move to lock position. If door lock motor does not operate as specified, replace door lock motor and retest system operation.

Right Rear Door

Remove door trim panel and service hole cover. Disconnect 4-pin electrical connector from door lock motor. Connect positive battery lead to door lock motor connector (component side) terminal No. 3 (Blue/Black wire) and negative battery lead to terminal No. 4 (Blue/Red wire). See WIRING DIAGRAMS . Door lock link should move to unlock position. Reverse battery leads (polarity). Door lock link should move to lock position. If door lock motor does not operate as specified, replace door lock motor and retest system operation.

  1. Remove door trim panel and service hole cover. Disconnect electrical connector from door lock motor. Connect ohmmeter between door lock motor connector (component side) terminals No. 4 (Gray wire) and No. 3 (Green/Red wire). See «WIRING DIAGRAMS»(ref-8993-S32970494742000093000000) .
  2. When door is locked, continuity should not exist. When door is unlocked, continuity should exist. If continuity is not as specified, replace door unlock detection switch and retest system operation.
  1. Remove door trim panel and service hole cover. Disconnect electrical connector from door lock motor. Connect ohmmeter between door lock motor connector (component side) terminals No. 3 (Gray wire) and No. 4 (Green/Red wire). See «WIRING DIAGRAMS»(ref-8993-S32970494742000093000000) .
  2. When door is locked, continuity should not exist. When door is unlocked, continuity should exist. If continuity is not as specified, replace door unlock detection switch and retest system operation.
  1. Remove door trim panel and service hole cover. Disconnect electrical connector from door lock motor. Connect ohmmeter between door lock motor connector (component side) terminals No. 3 (Gray wire) and No. 4 (Green/Red wire). See «WIRING DIAGRAMS»(ref-8993-S32970494742000093000000) .
  2. When door is locked, continuity should not exist. When door is unlocked, continuity should exist. If continuity is not as specified, replace door unlock detection switch and retest system operation.
  1. Remove door trim panel and service hole cover. Disconnect electrical connector from door lock motor. Connect ohmmeter between door lock motor connector (component side) terminals No. 2 (Gray wire) and No. 1 (Green/Red wire). See «WIRING DIAGRAMS»(ref-8993-S32970494742000093000000) .
  2. When door is locked, continuity should not exist. When door is unlocked, continuity should exist. If continuity is not as specified, replace door unlock detection switch and retest system operation.

ENGINE HOOD COURTESY SWITCH

Remove engine hood courtesy switch. Using an ohmmeter, check continuity between engine hood courtesy switch terminals. Continuity should exist with switch pin released. Continuity should not exist with switch pin pressed. If continuity is not as specified, replace courtesy switch and retest system operation.

HAZARD SWITCH

Remove hazard switch. With hazard switch in OFF position, continuity should exist between switch terminals No. 5 and 6. (Scheme 4) With hazard switch in ON position, continuity should exist between terminals No. 5 and 6. With hazard switch in either position, continuity should exist between terminals No. 8 and 9 (illumination circuit). If continuity is not as specified, replace hazard switch and retest system operation.

Scheme 4

Scheme 4: HAZARD SWITCH
Scheme 4: HAZARD SWITCH

HEADLIGHT RELAY

Remove headlight relay (located in junction block, on left side of engine compartment). Using an ohmmeter, check continuity between relay terminals. Continuity should exist between terminals No. 3 and 4. (Scheme 5) Apply battery voltage and ground between terminals No. 3 and 4. Continuity should exist between terminals No. 1 and 2. If continuity is not as specified, replace headlight relay and retest system operation.

Scheme 5

Scheme 5: HEADLIGHT RELAY
Scheme 5: HEADLIGHT RELAY

PARKING BRAKE SWITCH

Disconnect parking brake switch connector (located on parking brake). Using an ohmmeter, check continuity between parking brake switch terminal and switch body. With switch pin released (switch on), continuity should exist. With switch pin pressed (switch off), continuity should not exist. If continuity is not as specified, replace parking brake switch and retest system operation.

SEAT BELT BUCKLE SWITCH

Disconnect 4-pin driver-side seat belt buckle switch connector. Check for continuity between buckle switch 4-pin connector (component side) terminals No. 1 (Green/White wire) and No. 4 (White/Black wire). See WIRING DIAGRAMS . With belt fastened, continuity should exist. With belt unfastened, continuity should not exist. If continuity is not as specified, replace seat belt buckle switch and retest system operation.

STANDARD HORN

Disconnect both standard horn connectors (located behind center of grille and behind left-side of front bumper). Connect battery positive lead to terminal No. 1 (Green/White wire) and negative battery lead to horn body. See WIRING DIAGRAMS . If horn does not operate, replace horn. If horn operates, repair or replace wire harness and connectors between horn and horn relay.

STOPLIGHT SWITCH

Disconnect stoplight switch connector (located on brake pedal support). Using an ohmmeter, check continuity between stoplight switch terminals. With switch pin released (brake pedal pressed), continuity should exist between terminals No. 1 and 2, and continuity should not exist between terminals No. 3 and 4. (Scheme 6) With switch pin pressed (brake pedal released), continuity should exist between terminals No. 3 and 4, and continuity should not exist between terminals No. 1 and 2. If continuity is not as specified, replace stoplight switch and retest system operation.

Scheme 6

Scheme 6: STOPLIGHT SWITCH
Scheme 6: STOPLIGHT SWITCH

TAILLIGHT RELAY

Remove taillight relay (located in instrument panel junction block, behind left side of instrument panel). Using an ohmmeter, check continuity between relay terminals. Continuity should exist between terminals No. 1 and 2. (Scheme 7) Apply battery voltage and ground between terminals No. 1 and 2. Continuity should exist between terminals No. 3 and 5. If continuity is not as specified, replace taillight relay and retest system operation.

Scheme 7

Scheme 7: TAILLIGHT RELAY
Scheme 7: TAILLIGHT RELAY

WIRELESS DOOR LOCK BUZZER

Disconnect wireless door lock buzzer connector (located in left front corner of engine compartment). Connect ohmmeter positive lead to terminal No. 1 (Light Green wire) and negative ohmmeter lead to terminal No. 2 (Gray wire). See WIRING DIAGRAMS . Resistance should be one k/ohm. If resistance is not as specified, replace wireless door lock buzzer and retest system operation.

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