Component Tests and General Diagnostics

BODY CONTROL MODULE (BCM) INSPECTION

1. Remove the front scuff plate. (driver-side) Front Scuff Plate Removal/Installation

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

3. Remove the BCM with the connector connected. Service and Repair

4. 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 , 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 (Reference)

*1
With theft-deterrent system
*2
With car-navigation system
*3
With advanced keyless entry and push button start system
*4
Without advanced keyless entry and push button start system

Generated pulse (reference)

Pattern 1

- Terminal: 8G (+) <--> body ground (-)
- Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range

Pattern 2

- Terminal:

- Bonnet latch switch signal: 1S (+) <--> body ground (-)
- Front door latch switch (driver side) input signal: 8B (+) <--> body ground (-)
- Lock/unlock input: 8C (+) <--> body ground (-)
- Front door latch switch (passenger side) signal: 8D (+) <--> body ground (-)
- Unlock input (Driver-side door lock-link switch): 8E (+) <--> body ground (-)
- Rear door switch (RH) signal: 8F (+) <--> body ground (-)
- Lock input (Driver-side door lock-link switch): 8G (+) <--> body ground (-)
- Rear door switch (LH) signal: 8H (+) <--> body ground (-)

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

Pattern 3

- Terminal: 5F (+) <--> body ground (-)
- Oscilloscope setting: 1 V/DIV (Y), 200 microseconds/DIV (X), DC range

Pattern 4

- Terminal:

- Interior light control: 6M (+) <--> body ground (-)
- Courtesy light control: 6O (+) <--> body ground (-)
- Trunk room light control: 7B (+) <--> body ground (-)

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