GM Service Manual Online
For 1990-2009 cars only

Front and Rear Object Alarm Module Scan Tool Information SWBLHD

The scan tool data list contains all the object detection system related parameters that are available on the scan tool. The parameters in the list are arranged in alphabetical order.

Use the object detection scan tool data list as directed by a diagnostic table or in order to supplement the diagnostic procedures. Begin all of the diagnostic procedures with the Diagnostic System Check - Vehicle. Use the scan tool data list after the following is determined:

    • There is no published diagnostic trouble code (DTC) procedure nor published symptom procedure for the customer concern.
    • The DTC or symptom diagnostic procedure indicated by the diagnostic system check does not resolve the customer concern.

The typical data values are obtained from a correctly operating vehicle under the conditions specified in the second row of the scan tool data list table. Comparison of the parameter values from the suspect vehicle with the expected values may reveal the source of the customer concern.

Parameter

Operating Conditions

Expected Value

Definition

Ignition is ON, engine OFF, and vehicle is stationary

Attached Object

Tow bar att. selected

Yes

The scan tool displays No if the tow bar att. is not selected. The scan tool displays Yes when the tow bar att. is selected and the object detection is deactivated.

Tow bar att. not selected

No

Back-Up System Power Mode

--

Valid

This parameter displays the status of the backup system power mode.

--

Invalid

Battery Voltage

--

Volts

The scan tool displays 0-20 volts. This is the system voltage measured by the object detection module between the battery input and ground.

Calculated Gear

Gear selector in the PARK position

P-N

The scan tool displays P-N, R, P-N and In Gear. This parameter is determined by the current gear selected as supplied by the TCM via the BCM.

Gear selector in the REVERSE position

R

Gear selector in the NEUTRAL position

P-N

Gear selector in the DRIVE position

In Gear

Calculated Rear Distance

--

250 cm

The scan tool displays the maximum detection range by the object detection module based on the data received from the rear sensors.

Indicator Status Object Detection

--

Okay

The scan tool displays whether the object detection indicator status is Okay or Not Okay.

--

Not Okay

Object Detection Indicator

Object detection indicator activated

On

The scan tool displays whether the object detection indicator is On or Off

Object detection indicator deactivated

Off

Object Detection Status

Object detection activated

Active

The scan tool displays whether the object detection system is Active or Inactive.

Object detection deactivated

Inactive

Object Detection Switch

Object detection switch activated

Active

The scan tool displays whether the object detection system is Active or Inactive.

Object detection switch deactivated

Inactive

Rear Chime

Object within sensor proximity.

Active

This parameter displays the status of the Rear Chime.

Object not within sensor proximity.

Inactive

Rear Left

Object within sensor proximity.

Detected

The scan tool displays Detected or Not Detected. The scan tool displays Detected when the object detection module is receiving an present object signal from the sensor.

Object not within sensor proximity.

Not Detected

Rear Middle

Object within sensor proximity.

Detected

The scan tool displays Detected or Not Detected. The scan tool displays Detected when the object detection module is receiving an present object signal from the sensor.

Object not within sensor proximity.

Not Detected

Rear Right

Object within sensor proximity.

Detected

The scan tool displays Detected or Not Detected. The scan tool displays Detected when the object detection module is receiving an present object signal from the sensor.

Object not within sensor proximity.

Not Detected

RL Calculated Distance

--

250 cm

The scan tool displays the maximum detection range by the object detection module based on the data received from the rear left sensors.

RM Calculated Distance

--

250 cm

The scan tool displays the maximum detection range by the object detection module based on the data received from the rear middle sensors.

RR Calculated Distance

--

250 cm

The scan tool displays the maximum detection range by the object detection module based on the data received from the rear right sensors.

Sensor Line Status

--

Okay

The scan tool displays whether the sensor line status is Okay or Not Okay.

--

Not Okay

Sensor Supply Voltage

--

8 Volts

The scan tool displays the voltage that is being sent to the object sensors.

Speaker Supply Voltage

--

12 Volts

The scan tool displays the speaker supply voltage to the radio measured in Volts.

Speaker Voltage

--

12 Volts

The scan tool displays the return voltage from the speaker in Volts.

System Power Mode

Ignition is in OFF position

Off

This parameter displays Off/Accessory/Run/Crank. This is the status of the system power mode dependent on the ignition position.

Ignition is in ACC position

Accessory

Ignition is in RUN position

Run

Ignition is in CRANK position

Crank

Trailer Hitch

Tow bar att. option selected

Present

The scan tool displays Present or Not Present. This displays if the tow bar att. option has been selected for the use of a trailer hitch.

Tow bar att. option not selected

Not Present

Vehicle Speed

Speed dependent

0 Km

The scan tool displays the speed of vehicle.

Front and Rear Object Alarm Module Scan Tool Information SWBLWB

The scan tool data list contains all the object detection system related parameters that are available on the scan tool. The parameters in the list are arranged in alphabetical order.

Use the object detection scan tool data list as directed by a diagnostic table or in order to supplement the diagnostic procedures. Begin all of the diagnostic procedures with the Diagnostic System Check - Vehicle. Use the scan tool data list after the following is determined:

    • There is no published diagnostic trouble code (DTC) procedure nor published symptom procedure for the customer concern.
    • The DTC or symptom diagnostic procedure indicated by the diagnostic system check does not resolve the customer concern.

The typical data values are obtained from a correctly operating vehicle under the conditions specified in the second row of the scan tool data list table. Comparison of the parameter values from the suspect vehicle with the expected data values may reveal the source of the customer concern.

Parameter

Operating Conditions

Expected Value

Definition

Ignition is ON, engine OFF, and vehicle is stationary

Attached Object

Tow bar att. selected

Yes

The scan tool displays No if the tow bar att. is not selected. The scan tool displays Yes when the tow bar att. is selected and the object detection is deactivated.

Tow bar att. not selected

No

Back-Up System Power Mode

--

Valid

This parameter displays the status of the backup system power mode.

--

Invalid

Battery Voltage

--

Volts

The scan tool displays 0-20 Volts. This is the system voltage measured by the object detection module between the battery input and ground.

Calculated Front Distance

--

250 cm

The scan tool displays the maximum detection range by the object detection module based on the data received from the front sensors.

Calculated Gear

Gear selector in the PARK position

P-N

The scan tool displays P-N, R, P-N and In Gear. This parameter is determined by the current gear selected as supplied by the TCM via the BCM.

Gear selector in the REVERSE position

R

Gear selector in the NEUTRAL position

P-N

Gear selector in the DRIVE position

In Gear

Calculated Rear Distance

--

250 cm

The scan tool displays the maximum detection range by the object detection module based on the data received from the rear sensors.

FL Calculated Distance

--

250 cm

The scan tool displays the maximum detection range by the object detection module based on the data received from the front left sensors.

FM Calculated Distance

--

250 cm

The scan tool displays the maximum detection range by the object detection module based on the data received from the front middle sensors.

FR Calculated Distance

--

250 cm

The scan tool displays the maximum detection range by the object detection module based on the data received from the front right sensors.

Front Chime

Object within sensor proximity.

Active

This parameter displays the status of the Front Chime.

Object not within sensor proximity.

Inactive

Front Left

Object within sensor proximity.

Detected

The scan tool displays Detected or Not Detected. The scan tool displays Detected when the object detection module is receiving an present object signal from the sensor.

Object not within sensor proximity.

Not Detected

Front Middle

Object within sensor proximity.

Detected

The scan tool displays Detected or Not Detected. The scan tool displays Detected when the object detection module is receiving an present object signal from the sensor.

Object not within sensor proximity.

Not Detected

Front Right

Object within sensor proximity.

Detected

The scan tool displays Detected or Not Detected. The scan tool displays Detected when the object detection module is receiving an present object signal from the sensor.

Object not within sensor proximity.

Not Detected

Indicator Status Object Detection

--

Okay

The scan tool displays whether the object detection indicator status is Okay or Not Okay.

--

Not Okay

Object Detection Indicator

Object detection indicator activated

On

The scan tool displays whether the object detection indicator is On or Off

Object detection indicator deactivated

Off

Object Detection Status

Object detection activated

Active

The scan tool displays whether the object detection system is Active or Inactive.

Object detection deactivated

Inactive

Object Detection Switch

Object detection switch activated

Active

The scan tool displays whether the object detection system is Active or Inactive.

Object detection switch deactivated

Inactive

Rear Chime

Object within sensor proximity.

Active

This parameter displays the status of the Rear Chime.

Object not within sensor proximity.

Inactive

Rear Left

Object within sensor proximity.

Detected

The scan tool displays Detected or Not Detected. The scan tool displays Detected when the object detection module is receiving an present object signal from the sensor.

Object not within sensor proximity.

Not Detected

Rear Middle

Object within sensor proximity.

Detected

The scan tool displays Detected or Not Detected. The scan tool displays Detected when the object detection module is receiving an present object signal from the sensor.

Object not within sensor proximity.

Not Detected

Rear Right

Object within sensor proximity.

Detected

The scan tool displays Detected or Not Detected. The scan tool displays Detected when the object detection module is receiving an present object signal from the sensor.

Object not within sensor proximity.

Not Detected

RL Calculated Distance

--

250 cm

The scan tool displays the maximum detection range by the object detection module based on the data received from the rear left sensors.

RM Calculated Distance

--

250 cm

The scan tool displays the maximum detection range by the object detection module based on the data received from the rear middle sensors.

RR Calculated Distance

--

250 cm

The scan tool displays the maximum detection range by the object detection module based on the data received from the rear right sensors.

Sensor Line Status

--

Okay

The scan tool displays whether the sensor line status is Okay or Not Okay.

--

Not Okay

Sensor Supply Voltage

--

8 Volts

The scan tool displays the voltage that is being sent to the object sensors.

Speaker Supply Voltage

--

12 Volts

The scan tool displays the speaker supply voltage to the radio measured in Volts.

Speaker Voltage

--

12 Volts

The scan tool displays the return voltage from the speaker in Volts.

System Power Mode

Ignition is in OFF position

Off

This parameter displays Off/Accessory/Run/Crank. This is the status of the system power mode dependent on the ignition position.

Ignition is in ACC position

Accessory

Ignition is in RUN position

Run

Ignition is in CRANK position

Crank

Trailer Hitch

Tow bar att. option selected

Present

The scan tool displays Present or Not Present. This displays if the tow bar att. option has been selected for the use of a trailer hitch.

Tow bar att. option not selected

Not Present

Vehicle Speed

Speed dependent

0 Km

The scan tool displays the speed of vehicle.