| Table 1: | Body Control Module Scan Tool Data Parameters |
| Table 2: | Body Control Module Scan Tool Output Controls |
Parameter | Expected Value | Definition |
|---|---|---|
Operating Conditions: Engine ON | ||
Accessory Switch | Active | The scan tool displays Active or Inactive. This is the state of the accessory switch. |
All Door Lock Motors | Off | The scan tool displays On or Off. This is the state of all door lock motors. |
Ambient Light Sensor | Varies | This displays Volts. This is the current voltage at the ambient light sensor. |
Auto. Learn Counter | Varies | The scan tool displays counts. The scan tool displays 0-3. The scan tool displays the current state of the Auto. Learn Timer Counter. The Auto. Learn Counter must increment a total of three times in order for the relearn procedure to be complete. |
Auto. Learn Timer | Varies | The scan tool displays seconds. The scan tool displays 0-600 seconds. The scan tool displays the current state of the Auto. Learn Timer which increments in 10 second intervals. The Auto. Learn Timer must time out 3 times in order for the relearn procedure to be complete. |
Backup Lamps | Off | The scan tool displays On or Off. This is the state of the backup lamps. |
Battery Voltage | Varies | This displays Volts. This is the current battery voltage. |
BPP Sensor | volts | |
BPP System Status | yes/no | |
BPPS High During Learn | No | The scan tool displays Yes or No. Yes is displayed if the BPPS was high during BPP calibration. |
BPPS Learned Home Position | Varies | This displays Counts. This numeric value is the BPP sensor learned home position. |
BPPS Low During Learn | No | The scan tool displays Yes or No. Yes is displayed if the BPPS was low during BPP calibration. |
BPPS Move During Learn | No | The scan tool displays Yes or No. Yes is displayed if the BPPS was moved during BPP calibration. |
BPPS Status | The scan tool displays Yes or No. | |
Brake Applied Output Signal | Off | The scan tool displays On or Off. This is the state of the brake applied output signal. |
Brake Lamp | Off | The scan tool displays On or Off. This is the currently commanded state of the brake lamps. |
BTSI Solenoid | Off | The scan tool displays On or Off. Display indicates ON when the shift lock control solenoid is ON. |
Console Shift BTSI Relay | Off | The scan tool displays On or Off. Display indicates ON when the shift lock control relay is ON. |
Driver Door Unlock Motor | Off | The scan tool displays OFF/ON. This is the Unlock output from the body control module (BCM) to the driver door lock actuator. When either door lock switch is operated to the Unlock position the parameter is displayed as ON. |
Fail Enable Counter | Varies | The scan tool displays counts, from 0-255. The scan tool displays the number of ignition cycles the immobilizer system has been in the fail enable state. |
First Key Flag | Off | The scan tool displays On/Off. The scan tool displays On when the immobilizer system is ready to learn the first key transponder value. |
Flash to Pass Switch | Inactive | The scan tool displays Active or Inactive. This is the state of the flash to pass switch. |
Front Fog Lamp Relay | Off | The scan tool displays On or Off. This is the state of the front fog lamp relay system. |
Front Fog Lamp Switch | Off | The scan tool displays On or Off. This is the state of the front fog lamp relay switch. |
Hazard Switch Signal | Off | The scan tool displays On or Off. This is the state of the hazard switch. |
Headlamp Off Switch | Inactive | The scan tool displays Active or Inactive. This is the state of the headlamp switch. |
High Beam Relay | Off | The scan tool displays On or Off. This is the state of the high beam relay. |
High Beam Select Switch | Off | The scan tool displays On or Off. This is the state of the high beam select switch. |
Hood Ajar Switch | Closed | The scan tool displays Ajar or Closed. This is the state of the hood ajar switch. |
Horn Relay | Off | The scan tool displays On or Off. This is the state of the horn relay. |
Horn Switch | Off | The scan tool displays On or Off. This is the state of the horn switch. |
Ignition Power relay | On | The scan tool displays On or Off. This is the state of the ignition power relay. |
Ignition Run/Start Switch | Active | The scan tool displays Active or Inactive. Input to the control module from the ignition switch indicating the state of the RUN signal. |
Immobilizer Fail Enable | Off | The scan tool displays On or Off. If the immobilizer system is unable to read the ignition key transponder value after the vehicle has started, the immobilizer system will consider itself malfunctioning and the immobilizer system will enter a fail enable state. When the immobilizer system is in a fail enable state the immobilizer system is NOT active and the vehicle will start. |
Immobilizer States | Valid Key Code | This displays the current state of the vehicle immobilizer system. |
Interior Lamp Output | Off | The scan tool displays ON/OFF. This output of the BCM is displayed as ON when the interior lamps are turned ON. |
Interior Lights Power | Off | The scan tool displays ON/OFF. When the interior lamps switch has voltage applied, the scan tool will display ON. |
Interior Light Switch | Off | The scan tool displays On or Off. When the interior light switch is placed in the DOME position, the scan tool will display ON. |
Interior Lights Power | Off | The scan tool displays On or Off. When the interior lamps switch has voltage applied, the scan tool will display ON. |
Instrumentation Backlight Dimming Panel | Off | The scan tool displays ON/OFF. This output of the BCM is displayed as ON when the I/P lamps are commanded ON by the BCM. |
Key in Ignition | Yes | The scan tool displays Yes or No. Input from ignition switch indicating that the ignition key is inserted into the ignition switch. |
LF Door Ajar Switch | Door Closed | The scan tool displays Door Closed or Ajar. The scan tool will display Ajar when the door is open. |
LF Door Open Switch | Closed | The scan tool displays Open or Closed. The scan tool will display Open when the door is open. |
LF Key Cylinder Lock Switch | Idle | The scan tool will display Idle/Lock/Unlock/Invalid depending on the position of the LF key cylinder. |
LF Turn/DRL Status | On | The scan tool displays ON/OFF. This output of the BCM is displayed as ON when the left turn signal is turned ON or when the BCM turns ON the DRL lamps. |
Left Front Heated Seat Relay | Off | The scan tool displays On/Off. This is the output of the body control module (BCM) to the driver's seat heated seat relay. The scan displays On when the heated seat is on. |
Learn In Progress | No | The scan tool displays NO/YES. When the brake pedal position sensor is being calibrated, the scan tool will display YES. |
Left Heated Seat Temperature | Varies | The scan tool displays counts. |
Left Rear Door Ajar Switch | Closed | The scan tool displays Closed or Ajar. The scan tool will display Ajar when the door is open. |
Left Turn Signal | Off | The scan tool displays On or Off. When the turn signal switch is placed in the LEFT turn position, the scan tool will display ON. |
Low Beam Relay Command | Off | The scan tool displays ON/OFF. This output of the BCM is displayed as ON when the low beam headlamps are turned ON. |
Low Beam Switch | Off | The scan tool displays ON/OFF. When the headlamp dimmer switch is placed in the LOW position, the scan tool will display ON. |
Low Washer Fluid | OK | This input displays the washer fluid level. Low is displayed when the level is Low and OK is displayed if it is above the switch threshold. |
LR Door Open Switch | Closed | The scan tool displays the position of the right rear door. The scan tool will display Open when the door is open. |
LR Stop/Turn Signal Lamp | Off | The scan tool displays ON/OFF. This output of the BCM is displayed as ON when the left turn signal is turned ON or when the brakes are applied. |
No. of Learned Key Codes | Varies | The scan tool displays 1-10. The scan tool displays the number of transponder values learned by the immobilizer system. |
Park Brake Switch | Released | The scan tool displays Set or Released. When the park brake is applied, the scan tool will display Set. |
Park Lamp Relay | Off | The scan tool displays On or Off. This is the state of the park lamp relay. |
Park Lamp Switch | Off | The scan tool displays On or Off. This is the state of the park lamp switch. |
Passenger Door Unlock Motors | Off | The scan tool displays OFF/ON. This is the Unlock output from the body control module (BCM) to all passenger door lock actuators. When either door lock switch is operated to the Unlock position the parameter is displayed as ON. |
Passkey Power Mode | Off | The scan tool displays On/Off. The scan tool displays ON when the BCM is commanding the theft deterrent exciter ON. |
RAP Relay | Off | The scan tool displays On or Off. This displays the state of the RAP relay control circuit. |
Rear Defog Relay | Off | The scan tool displays On or Off. |
Regulated Voltage Control Current Sensor | 40 % | The scan tool displays 1-100 percent. The scan tool displays the percentage of the battery current sensor pulse width modulation (PWM) duty cycle signal. |
RF Door Ajar Switch | Door Closed | The scan tool displays Door Closed/Ajar, the front passenger door ajar switch input to the body control module (BCM), where an open door is displayed as Ajar. |
RF Door Lock Switch | Inactive | The scan tool displays Active or Inactive. This is the front passenger door lock switch input to the body control module (BCM). |
RF Door Open Switch | Closed | The scan tool displays Closed/Open, the front passenger door open switch input to the body control module (BCM), where an open door is displayed as Open. |
RF Door Unlock Switch | Inactive | The scan tool displays Active or Inactive. This is the front passenger door unlock switch input to the body control module (BCM). |
RF Key Cylinder Lock Switch | Idle | If the vehicle is equipped with this feature, the scan tool displays Idle/Lock/Unlock/Invalid, the front passenger door key cylinder switch input to the body control module (BCM), where the switch transitions to the lock and unlock positions are displayed as Lock and Unlock. If the switch is stuck, or if the switch circuit has shorted to ground, the scan tool will display that function as active. If the switch is then activated to the opposite function, the scan tool displays Invalid. |
RF Turn Lamp/DRL Status | Off | The scan tool displays On or Off. This is the state of the right front turn lamp. |
Right Front Heated Seat Relay | Off | The scan tool displays On/Off. This is the output of the body control module (BCM) to the passenger seat heated seat relay. The scan displays On when the heated seat is on. |
Right Heated Seat Temperature | -- | The scan tool displays counts. |
RR Door Ajar Switch | Closed | The scan tool displays Closed or Open. This is the state of the passenger rear door ajar switch. |
RR Stop/Turn Signal Lamp | Off | The scan tool displays On or Off. This is the state of the right rear lamp. |
Run Relay | Off | The scan tool displays On or Off. This is the state of the run relay. |
Starter Switch | Released | The scan tool displays Released/Crank. The scan tool displays Released until the ignition switch is placed into the CRANK position, then it reads Crank. |
Tamper Flag | Off | The scan tool displays On/Off. The scan tool displays On when the immobilizer system has read a key transponder value that has not been previously learned. |
TCS Switch | Released | The scan tool displays Released/Pressed. The scan tool will display the state of the Traction Control Switch. |
Trunk Key Cylinder Switch | Inactive | The scan tool displays Inactive/Active, the driver door key cylinder switch input to the body control module (BCM). |
Trunk Open Switch | Closed | The scan tool displays Open or Closed. The scan tool will display Open when the trunk is open. |
Trunk Release Solenoid | Off | The scan tool displays On or Off. The scan tool displays On when the BCM activates the trunk release solenoid. |
Wiper Motor Low/Hi Speed Relay | Off | The scan tool displays On or Off. This output displays the state of the wiper Hi relay. On is wipers Hi speed and Off is wipers Low speed. |
Wiper High Speed Switch | Inactive | The scan tool displays Active or Inactive. This is the state of the wiper high speed switch. |
Wiper Motor Park Switch | Inactive | The scan tool displays Active or Inactive. This is the state of the wiper park switch. |
Wiper Motor Relay | Off | The scan tool displays On/Off. This output displays whether or not the BCM is providing voltage for the wiper relay. ON is displayed when the BCM detects the correct signal from the windshield wiper switch. |
Wiper Washer Switch | Inactive | The scan tool displays Active or Inactive. The BCM uses this input to determine if the wash switch is active. If it is depressed, the BCM commands the wiper 1 relay ON and keeps it ON until 2 wipe cycles have completed after the switch has been released (inactive). |
Wiper Washer Motor | -- | The scan tool displays On/Off. This output displays the operation mode of the washer pump motor. |
Scan Tool Output Control | Description |
|---|---|
Backup Lamps | The BCM activates the backup lamp relay when you select ON. The backup lamps illuminate until commanded OFF. |
BPP Sensor Calibration | This output control is used to command the BCM to calibrate the brake pedal position (BPP) sensor to zero. |
Brake to Shift Control | The body control module (BCM) controls the voltage to the automatic transmission shift lock control solenoid ON or OFF for 5 seconds. |
Driver Door Unlock | The BCM momentarily pulses only the driver door lock motor. The driver door should unlock when ON is selected. |
Driver Heated Seat | The BCM activates the driver heated seat when you select ON. |
Fog Lamps | The BCM activates the fog lamps relay when you select ON. The fog lamps illuminate until commanded OFF. |
High Beams | The BCM activates the high beam relay when you select ON. The high beam headlamps illuminate until commanded OFF. |
Horn | This output control is used to command the horn On and Off. |
Ignition Power Relay | This output control commands the Ignition 1 (IGN 1) relay On and Off. |
Incandescent Dimming | The BCM commands the IPC to dim the instruments from full dim to full bright. |
Interior Lamps | The BCM activates the interior lamps outputs for 5 seconds when you select ON. The dome, footwell, and courtesy lamps illuminate for 5 seconds. |
LF Turn Lamp/DRL | The BCM activates the left front turn signal lamp when you select ON. The turn signal lamp illuminates until commanded OFF. |
Lock All Doors | The BCM momentarily pulses all of the door lock motors. All doors should lock when ON is selected. |
Low Beam/DRL | The BCM activates the low beam relay when you select ON. The low beam headlamps illuminate until commanded OFF. |
LR Stop/Turn Signal Lamp | The BCM activates the left rear stop/turn signal lamp when you select ON. The Lamp illuminates until commanded OFF. |
Passenger Heated Seat | The BCM activates the driver passenger heated seat when you select ON. |
Parking Lamps | The BCM activates the park lamp relay when you select ON. The park lamps illuminate until commanded OFF. |
Rear Defog Relay | The BCM activates the rear defog relay when you select ON. |
Retained Accessory Power | Commands RAP relay On/Off for 5 seconds to check equipment response |
RF Turn Lamp/DRL | The BCM activates the right front turn signal lamps when you select ON. The turn signal lamps illuminate until commanded OFF. |
RR Stop/Turn Signal Lamp | The BCM activates the left rear stop/turn signal lamp when you select ON. The Lamp illuminates until commanded OFF. |
Security LED | The BCM actuates the security LED when you select ON. The security LED should illuminate until commanded OFF. |
Trunk Release | The BCM activates the trunk release solenoid when you select ON. |
Unlock All Doors | The BCM momentarily pulses all of the door lock motors. All doors should unlock when ON is selected. |
Wiper High Speed Relay | This output control is used to command the wiper high speed relay On and Off. |
Wiper Relay | This output control is used to command the wiper relay On and Off. |
Wiper Washer Motor | This output control is used to command the wiper washer motor On and Off. |
