Body Control Module: Testing and Inspection

BODY CONTROL MODULE (BCM) INSPECTION

1. Remove the front scuff plate inner (LH). (See Front Scuff Plate Removal/Installation)

2. Remove the front side trim (LH). Front Side Trim Removal/Installation

3. Remove the dashboard under cover. (Driver side) Dashboard Under Cover Removal/Installation

4. Set the hood release lever out of the way. Service and Repair

5. Remove the BCM with the connector connected.

6. Measure the voltage at each terminal is as indicated in the Terminal Voltage Tables.

- If the voltage is not as specified in the Terminal Voltage Table, 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)

















































*1
With theft-deterrent system
*2
With seat warmer system
*3
With inverter
*4
With seat position memory function
*5
With sunroof system
*6
With car-navigation system
*7
With advanced keyless entry and start system
*8
With AWD
*9
With auto light system

Generated pulse (reference)

Pattern 1





- Terminal:

- Lock/unlock input (passenger-side door lock-link switch): 1E (+) -> body ground (-)
- Lock/unlock input (rear door lock-link switch (LH)): 6U (+) -> body ground (-)
- Lock/unlock input (rear door lock-link switch (RH): 6W (+) -> body ground (-)

- Oscilloscope setting: 1 V/DIV (Y), 1 ms/DIV (X), DC range

Pattern 2





- Terminal:

- Hood latch switch signal: 1B (+) -> body ground (-)
- Unlock input (Driver-side door lock-link switch): 5K (+) -> body ground (-)
- Lock input (Driver-side door lock-link switch): 5N (+) -> body ground (-)

- Oscilloscope setting: 1 V/DIV (Y), 1 ms/DIV (X), DC range

Pattern 3





- Terminal: 3V (+) -> body ground (-)
- Oscilloscope setting: 1 V/DIV (Y), 200 microsecond/DIV (X), DC range

Pattern 4





- Terminal:

- Courtesy light (RH) control: 2E (+) -> body ground (-)
- Courtesy light (LH) control: 4B (+) -> body ground (-)
- Interior light control: 7I (+) -> body ground (-)

- Oscilloscope setting: 5 V/DIV (Y), 5 ms/DIV (X), DC range

Pattern 5





- Terminal:

- Lock/unlock input (passenger-side door lock-link switch): 1E (+) -> body ground (-)

- Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range