L200 L4-2.2L VIN F (2002)
Power for the rear washer motor is supplied through the front wiper fuse and rear washer switch. Grounding for the rear washer motor is through the OFF
position of the front washer motor switch.
Rear Wiper Control
When operation of the rear wiper is selected, battery voltage from the rear wiper switch is applied to the rear wiper input of the BCM circuit 94. The
BCM responds by switching circuit 1445-to-ground. This action energizes the rear wiper relay, providing power to the rear wiper motor.
Security System
The passlock sensor is powered by circuit 812. The passlock sensor is grounded by circuit 1057. Passlock sensor data is supplied to the BCM by circuit
1836.
The passlock sensor data supplied to the BCM is in the form of V-codes or voltage codes. When the proper ignition key is turned in the ignition switch,
the correct V-code is supplied to the BCM. The BCM responds by sending a serial data password to the engine controller allowing the engine to run.
The security resistor is bypassed under a tamper condition (possible external magnet applied to sensor). In this mode, a specific V-code is supplied to the
ECM. The vehicle will not start in this mode.
Telltale Chimes
The Body Control Module (BCM) will provide 4 chimes for each telltale activation, per ignition cycle at a rate of 150 or 200 chimes per minute. The
Chimes are limited to one chime event per telltale for each ignition cycle. The power up telltale function will not activate the telltale chime function. If
the telltale becomes active during a drive cycle then the chime will sound.
The following telltales will activate the chime function:
^
Low Washer Fluid
^
Change Oil Soon Indicator
^
Brake Fluid Low
^
Oil Pressure Low
^
Coolant Temperature Hot
^
Low Coolant Level
^
Low Fuel Level
^
Antilock Brake System
^
Volts Light (Generator)
^
Supplemental Inflatable Restraint System (Air Bag)
^
Trunk or Hatch Ajar
Traction Control System Off Indicator
When the traction control system is in the On state, the traction control Light Emitting Diode (LED) request from the Electronic Brake Traction Control
Module (EBTCM) to the BCM circuit 832 is at battery voltage. In response, the BCM grounds circuit 1660. This action turns On the traction control
LED indicating to the driver the traction control system is able to react to slippery conditions.
When the traction control system is in the Off state, the traction control LED request from the EBTCM to the BCM circuit 832 is switched to ground. In
response, the ECM switches OFF the traction control LED indicating to the driver the traction control system has been disabled.
