Step Lamp

System Description

POWER SUPPLY AND GROUND
Power is supplied at all times
- to BCM terminal 105
- through 10 A fuse [No. 3, located in the fuse block (J/B) No. 1]
- to all step lamps terminal 1
- through 10 A fuse [No. 8, located in the fuse block (J/B) No. 1].

Ground is supplied
- to driver door control unit terminal 15 through grounds M24 and M114
- to passenger door control unit terminal 7 through grounds M24 and M114
- to rear LH door control unit and rear RH door control unit terminal 7 through grounds B17 and B57 or B217 and B256.

OPERATING PROCEDURE
BCM is connected to driver door control unit as DATA LINE A-3.
Then driver door control unit is connected to each door control unit.

When any door switch is in OPEN position, ground is supplied
- to BCM terminal 33, 37, 142, or 143
- through driver side, passenger side, rear LH or RH door switch.

Then BCM sends a signal to the driver door control unit (LCU 01) to turn on step lamp. With ground supplied, step lamp turns on.