For the 2009 model year, the way in which parking assist notifies the driver of an object
of interest has been modified. This change applies only to the Buick Enclave, Cadillac Escalade, Chevrolet Tahoe, Silverado, and Suburban, GMC Acadia, Sierra, Yukon, and Yukon XL, and Saturn Outlook.
TIP: The new driver notification scheme will be available through a calibration update to previous model year Buick Enclave, Cadillac Escalade, Chevrolet Tahoe, Silverado, and Suburban, GMC Acadia, Sierra, Yukon, and Yukon XL, and Saturn Outlook. The Buick Lucerne and Cadillac CTS, DTS, and SRX will receive a similar calibration update at a later time.
The previous driver notification scheme indicated an object of interest with a single beep at the time of first detection. The system would then continuously beep when the object was within 30 cm (1 ft.) of the vehicle. The new driver notification scheme still indicates an object of interest with a single beep at the time of first detection, but will beep continuously when the object is within 60 cm (2 ft.) of the vehicle. The visual indicators remain unchanged.
Additionally, the 2009 Buick Lucerne and Cadillac DTS will use a new part number sensor and module for the parking assist system. These new parts are specific to the 2009 model vehicles. Do not attempt to service 2009 vehicles with a 2008 part.
Parking Assist Diagnostic Aids
When diagnosing a customer concern on the parking assist system, be aware that certain conditions will normally disable the system. Items attached to the vehicle, such as a trailer hitch receiver or a bike rack, will disable the system because the vehicle cannot distinguish the difference between the items attached to the vehicle and an object of interest. The system will also be disabled if snow, mud, or ice is built up on the sensors or the vehicle travels too fast in reverse. Certain outside influences can also disable the system. Noises which vibrate the fascia, such as a jackhammer or large truck air brakes, may disturb the sensor, causing the system to disable.
As an aid to diagnosis, the scan tool Park Assist Disable History parameters can be used to locate any common causes or trends. For example, if the Park Assist Disable History parameters indicate repeated system disable due to an Attached Object, which could be a hitch receiver, system operation should be discussed with the customer before attempting to diagnose.
The parking assist sensor diagnostics have also been revised in SI. The diagnostic strategy advises that if only a single sensor DTC is present, swap that sensor with another sensor in the fascia to determine if the DTC follows the sensor. If the DTC follows the sensor to the new location, the sensor is likely the cause. If the DTC remains at the original location, vehicle wiring or the object alarm module is likely the cause.
During a system malfunction, it is highly improbable that all of the sensors or all of the sensors and the object alarm module are at fault and require replacement. Further system diagnostics should be performed to determine the specific item causing the malfunction.
TIP: When replacing a sensor, be sure the sensor has corrected the concern before applying paint to the sensor. When painting the sensor, do not apply an excessive amount of paint. High paint thickness may cause a sensor malfunction and system disable.
When servicing the parking assist system, follow standard GM guidelines when documenting the cause and correction on the repair order. Be sure to document all FTBs associated with any DTC(s) that have set.
- Thanks to Mike Gastmeier
of interest has been modified. This change applies only to the Buick Enclave, Cadillac Escalade, Chevrolet Tahoe, Silverado, and Suburban, GMC Acadia, Sierra, Yukon, and Yukon XL, and Saturn Outlook.
TIP: The new driver notification scheme will be available through a calibration update to previous model year Buick Enclave, Cadillac Escalade, Chevrolet Tahoe, Silverado, and Suburban, GMC Acadia, Sierra, Yukon, and Yukon XL, and Saturn Outlook. The Buick Lucerne and Cadillac CTS, DTS, and SRX will receive a similar calibration update at a later time.
The previous driver notification scheme indicated an object of interest with a single beep at the time of first detection. The system would then continuously beep when the object was within 30 cm (1 ft.) of the vehicle. The new driver notification scheme still indicates an object of interest with a single beep at the time of first detection, but will beep continuously when the object is within 60 cm (2 ft.) of the vehicle. The visual indicators remain unchanged.
Additionally, the 2009 Buick Lucerne and Cadillac DTS will use a new part number sensor and module for the parking assist system. These new parts are specific to the 2009 model vehicles. Do not attempt to service 2009 vehicles with a 2008 part.
Parking Assist Diagnostic Aids
When diagnosing a customer concern on the parking assist system, be aware that certain conditions will normally disable the system. Items attached to the vehicle, such as a trailer hitch receiver or a bike rack, will disable the system because the vehicle cannot distinguish the difference between the items attached to the vehicle and an object of interest. The system will also be disabled if snow, mud, or ice is built up on the sensors or the vehicle travels too fast in reverse. Certain outside influences can also disable the system. Noises which vibrate the fascia, such as a jackhammer or large truck air brakes, may disturb the sensor, causing the system to disable.
As an aid to diagnosis, the scan tool Park Assist Disable History parameters can be used to locate any common causes or trends. For example, if the Park Assist Disable History parameters indicate repeated system disable due to an Attached Object, which could be a hitch receiver, system operation should be discussed with the customer before attempting to diagnose.
The parking assist sensor diagnostics have also been revised in SI. The diagnostic strategy advises that if only a single sensor DTC is present, swap that sensor with another sensor in the fascia to determine if the DTC follows the sensor. If the DTC follows the sensor to the new location, the sensor is likely the cause. If the DTC remains at the original location, vehicle wiring or the object alarm module is likely the cause.
During a system malfunction, it is highly improbable that all of the sensors or all of the sensors and the object alarm module are at fault and require replacement. Further system diagnostics should be performed to determine the specific item causing the malfunction.
TIP: When replacing a sensor, be sure the sensor has corrected the concern before applying paint to the sensor. When painting the sensor, do not apply an excessive amount of paint. High paint thickness may cause a sensor malfunction and system disable.
When servicing the parking assist system, follow standard GM guidelines when documenting the cause and correction on the repair order. Be sure to document all FTBs associated with any DTC(s) that have set.
- Thanks to Mike Gastmeier
Leave a comment