The body control module (BCM) controls the BTSI solenoid by providing battery voltage to the BTSI solenoid. The BCM utilizes a smart driver to control the voltage supplied to the BTSI solenoid. The smart driver monitors the voltage and current flow of the control circuit.

The BCM output driver detects an open or short in the output control circuit.

The BCM disables the output control until the next ignition cycle.

The numbers below refer to the step numbers on the diagnostic table.

Traction Control System Circuit Short to Ground.

The EBCM monitors and evaluates the signal output signal from the hydraulic modulator pressure sensor to determine the brake fluid pressure applied to each wheel. This enables the EBCM to detect the speed at which brake pedal force is applied.

Runs in conjunction with the EBCM Self-test initialisation sequence.

If the EBCM detects a fault in the hydraulic modulator pressure sensor signal voltage output.

The following numbers refer to the step numbers in the diagnostic table :

DTC B2750 :Horn Relay Coil Circuit Shorted to Battery

The body control module (BCM) controls the horn relay by grounding the control circuit of the horn relay coil energizing the relay. When the horn relay is energized, the horn relay contacts close applying voltage through the horn fuse and the horn control circuit to the horns.

The DTC can only set only when the output is actively being requested by the BCM.

The BCM detects a short to voltage in the horn relay control circuit for approximately 125 milliseconds.

The BCM disables the output to the horn relay until the next ignition cycle.

Ignition ON, use scan tool horn output control to command the horn relay while listening for an audible click when commanding the horn relay ON and OFF.

DTC B2924 : Content Theft System Sensor 3(inclination, etc) Signal Circuit

The Content Theft Deterrent function provides the theft deterrent by sounding the horn and flashing the headlamps and the park lamps when there is an unauthorized vehicle entry or there is tampering detected.

The inclination sensor detects changes in the parked angle of the vehicle. If a change greater than specified degree for several seconds period is detected, the vehicles content theft alarm is sounded. The sensor recalibrates itself each time the vehicle is parked, which allows it to account for parking on steep grades without unintentional activation.

This DTC sets if the BCM detects an open and a short to voltage or ground in the inclination circuit.

The current DTC will become history when the request for the output is removed or when the condition for setting the fault is corrected.

DTC B3089 : Content Theft System Sensor 1(shock, intrusion, etc) Signal Circuit

The Content Theft Deterrent function provides the theft deterrent by sounding the horn and flashing the headlamps and the park lamps when there is an unauthorized vehicle entry or there is tampering detected.

When the content theft deterrent (CTD) system arms, and the intrusion sensor is enabled, the BCM receives a power-up acknowledgement from the intrusion sensor.

This DTC sets if the BCM detects an open and a short to voltage or ground in the intrusion signal circuit.

The current DTC will become history when the request for the output is removed or when the condition for setting the fault is corrected.

DTC B3130 : All Door Unlock Circuit

When the door lock switch is place in to the UNLOCK position, ground is applied through the switch to the body control module (BCM). The BCM then applies ground through the door unlock relay control circuit to the coil side of the unlock relay in the I/P Fuse Block. The relay then engages and applies voltage to all of the door lock assemblies.

The ignition is ON.

The BCM receives a voltage signal on the passenger door unlock relay control circuit.

The BCM cease attempt to unlock the doors.

The BCM clears this code from current when the fault is removed from the system.

Ignition ON, place the door lock switch to the UNLOCK position. All doors should unlock.

DTC B3135 : All Door Lock Circuit

When the door lock switch is place in to the LOCK position, ground is applied through the switch to the body control module (BCM). The BCM then applies a voltage through the door lock relay control circuit to the coil side of the lock relay in the I/P Fuse Block. The relay then engages and applies voltage to all the door lock assemblies.

The ignition is ON.

The BCM receives a ground signal on the door lock relay control circuit.

The BCM cease attempt to lock the doors.

The BCM clears this code from current when the fault is removed from the system.

Ignition ON, place the door lock switch to the LOCK position. All doors should lock.

DTC B3265 : Trunk/Hatch/Liftglass Release Output Circuit

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

The liftglass release switch is an input to the body control module (BCM). The BCM supplies battery voltage to the signal circuit and when the release switch is activated the signal circuit voltage goes low. The BCM controls the liftglass release actuator through the rear wiper motor control module. When the release switch signal is activated the BCM applies battery voltage to the liftglass latch release signal circuit. The rear wiper motor control module supplies voltage to the release actuator through the liftglass release actuator control circuit.

The liftglass latch release signal circuit is shorted to ground.

The BCM will disable the liftglass latch release signal circuit output until the next ignition cycle.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

DTC B3445 : Stop Lamp Circuit

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

When the brake pedal is applied, a signal is applied to the BCM. The BCM then applies a voltage to the stop lamp supply voltage circuit to the stop lamps.

The ignition is ON. The stop lamps must be commanded ON.

The BCM detects a short to voltage, ground, or an open in the stop lamp supply voltage circuit when the stop lamps are commanded ON.

The stop lamps do not illuminate.

Ignition ON, press the brake pedal. The stop lamps should illuminate.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

DTC B3622 : Steering Wheel Controls Signal Circuit

The body control module (BCM) monitors the signal circuit voltage. If the voltage level is too high, damage may result in the system. When a high voltage condition is detected, the BCM will ignore the switch command.

Ignition ON.

BCM detects voltage above 18.5 volts for 100 msec.

BCM will ignore the switch command.

DTC B370C : Rain Sensor Intensity Signal Circuit

The rain sensor monitors moisture accumulation on the windshield and uses a windshield wiper/washer switch status input to provide wipe commands to the BCM. The delay positions on the wiper/washer switch are used to activate the automatic rain sensing operating mode. They are also used to adjust the level of sensitivity to moisture accumulation, which determines the dwell time for commanding a wiper motor wipe cycle.

Accessory voltage is supplied to the rain sensor. Whenever the ignition is in the run or accessory positions, the BCM sends the wiper/washer switch status through the rain sensor signal 1 circuit to the rain sensor. When a wipe cycle is needed, the rain sensor sends a signal voltage through the rain sensor signal 2 circuit back to the BCM requesting the wiper operation.

The BCM detects a short to voltage, ground, or an open in the rain sensor signal 2 circuit.

The current DTC will become history when the request for the output is removed or when the condition for setting the fault is corrected.

DTC B370D : Rain Sensor Mode Control Circuit

The rain sensor monitors moisture accumulation on the windshield and uses a windshield wiper/washer switch status input to provide wipe commands to the BCM. The delay positions on the wiper/washer switch are used to activate the automatic rain sensing operating mode. They are also used to adjust the level of sensitivity to moisture accumulation, which determines the dwell time for commanding a wiper motor wipe cycle.

Accessory voltage is supplied to the rain sensor. Whenever the ignition is in the run or accessory positions, the BCM sends the wiper/washer switch status through the rain sensor signal 1 circuit to the rain sensor. When a wipe cycle is needed, the rain sensor sends a signal voltage through the rain sensor signal 2 circuit back to the BCM requesting the wiper operation.

The BCM detects a short to voltage, ground, or an open in the rain sensor signal 1 circuit.

The current DTC will become history when the request for the output is removed or when the condition for setting the fault is corrected.

DTC B3715 : Front Wiper Relay Drive Circuit

Always perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

The body control module (BCM) monitors the control circuit of the wiper relay. The voltage level should be low while the wiper relay is de-energized and near system voltage when the relay is energized. After the BCM receives a low, intermittent, or mist signal from the wiper/washer switch, it responds by applying battery voltage through the wiper relay control circuit to the coil side of the relay, energizing the WIPER Relay. Ground is supplied at all times to the coil side of the WIPER relay from GX401.

This DTC can set only when the output is actively being requested by the BCM.

If the BCM detects a short to ground in the wiper relay control circuit.

The BCM will not activate the output.