Component Tests and General Diagnostics
BODY CONTROL MODULE (BCM) INSPECTION
1. Remove the dashboard under cover. Dashboard Under Cover Removal/Installation
2. Remove the glove compartment. Service and Repair
3. Measure the voltage at each terminal and inspect for the continuity between the terminals and ground is as indicated in the Terminal Voltage Tables (Reference).
- If the voltage or continuity is not as specified in the Terminal Voltage Table (Reference), inspect the parts under "Inspection item (s)".
- If the system does not work properly even though the parts or related wiring harnesses do not have any malfunction, replace the BCM.
Terminal Voltage Table (Reference)
Generated pulse (reference)
Pattern 1
- Terminal:
- Turn switch input (RH): 6A (+) -> body ground (-)
- Turn switch input (LH): 6B (+) -> body ground (-)
- Rear wiper switch input (ON): 6C (+) -> body ground (-)
- Rear window defroster switch input: 6D (+) -> body ground (-)
- Windshield wiper switch input: 6S (+) -> body ground (-)
- Key cylinder switch signal: 7C (+) -> body ground (-)
- Lock / unlock signal: 7P (+) -> body ground (-)
- Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range
Pattern 2
- Terminal:
- Windshield wiper switch input (HI): 6F (+) -> body ground (-)
- Headlight switch input (HI): 6I (+) -> body ground (-)
- Headlight switch input (front fog light): 6K (+) -> body ground (-)
- Headlight switch input (LO): 6O (+) -> body ground (-)
- Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range
Pattern 3
- Terminal:
- Hazard warning switch signal: 6Q (+) -> body ground (-)
- Rear door latch switch (LH): 7G (+) -> body ground (-)
- Front door latch switch (driver side): 7I (+) -> body ground (-)
- Lock input (door lock-link switch): 7K (+) -> body ground (-)
- Lock input (door lock-link switch): 7L (+) -> body ground (-)
- Front door latch switch (passenger side): 7M (+) -> body ground (-)
- Rear door latch switch (RH): 7O (+) -> body ground (-)
- Unlock input (door lock-link switch): 7Q (+) -> body ground (-)
- Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range
Pattern 4
- Terminal:6L (+) -> body ground (-)
- Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range
Pattern 5
- Terminal: 6S (+) -> body ground (-)
- Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range
Pattern 6
- Terminal:
- Key cylinder switch signal: 7C (+) -> body ground (-)
- Lock / unlock signal: 7P (+) -> body ground (-)
- Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range
Pattern 7
- Terminal: 3I (+) -> body ground (-)
- Oscilloscope setting: 5 V/DIV (Y), 5 ms/DIV (X), DC range
Liftgate Opener Switch Input Signal Pulse (Reference)
Liftgate opener switch not pressed
- Terminal: 6U (+) -> body ground (-)
- Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range
- Measurement condition: Liftgate opener switch not pressed
Liftgate opener switch pressed
- Terminal: 6U (+) -> body ground (-)
- Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range
- Measurement condition: Liftgate opener switch pressed
Liftgate Opener Switch Signal Pulse (Reference)
- Terminal: 7A (+) -> body ground (-)
- Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range
- Measurement condition: Liftgate opener switch pressed
Door lock actuators 2-step unlocking (Reference)
- Terminal: 3E (+) -> body ground (-)
- Oscilloscope setting: 2 V/DIV (Y), 2 ms/DIV (X), DC range
- Measurement condition: Door lock actuators 2-step unlocking
Sensitivity adjustment volume (Reference)
1 position
- Terminal: 6P (+) -> body ground (-)
- Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range
2 position
- Terminal: 6P (+) -> body ground (-)
- Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range
3 position
- Terminal: 6P (+) -> body ground (-)
- Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range
4 position
- Terminal: 6P (+) -> body ground (-)
- Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range
5 position
- Terminal: 6P (+) -> body ground (-)
- Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range