Subject: | Park Assist System Inoperative, Service Park Assist Message on Driver Information Center (DIC), DTC B1E3A and/or B0954, B0955, B0956, B0957, B0958, B0959, B0960, B0961 (Replace Appropriate Object Sensor or Repair Harness) |
Models: | 2006-2008 Buick Lucerne |
2008-2009 Buick Enclave |
2006-2008 Cadillac DTS |
2007-2009 Cadillac Escalade, SRX |
2008-2009 Cadillac CTS |
2007-2009 Chevrolet Avalanche, Silverado, Suburban, Tahoe |
2009 Chevrolet Traverse |
2007-2009 GMC Acadia, Sierra, Yukon, Yukon XL |
2007-2009 Saturn OUTLOOK |
Equipped with Parking Assist (RPO UD7 or UFR) |
Some customers may comment on a "Service Park Assist" message displayed on the DIC. Upon investigation, the technician may find DTC B1E3A and one or more of the following DTC's stored: B0954, B0955, B0956, B0957, B0958, B0959, B0960, B0961.
This may be caused by a malfunctioning object sensor or a circuit fault on the 8 volt reference circuit.
Notice: The 8 volt reference circuit serves all of the object sensors in parallel. A fault anywhere on the circuit or in any single sensor will affect all of the sensors.
When a single sensor malfunctions, the shared 8 volt reference circuit may be compromised, resulting in a DTC for each sensor.
Important: DO NOT replace all the sensors and/or the object alarm module.
If normal diagnosis does not reveal any concerns with the park assist system, perform the following diagnostic procedure:
Important: With all the park assist sensor harness connectors disconnected, multiple sensor DTCs will set and will not clear. Ignore these DTCs.
• | If the DTC B1E3A is set, test the 8 volt reference circuit for a short to voltage/power or a short to ground. |
Important: Ensure each leg of the circuit is tested since the 8 volt reference circuit feeds all the sensors in parallel. |
• | Repair the faulty leg. |
Part Number | Description | Quantity |
---|---|---|
15239247 | Sensor Kit, RR Object | 1 |
For vehicles repaired under warranty, use:
Labor Operation | Description | Labor Time |
---|---|---|
R4113 | Sensor, Front Object Alarm - Replace | Use Published Labor Operation Time |
R4114 | Sensor, Rear Object - Replace | Use Published Labor Operation Time |
N6620 | Wiring And/Or Connector- Power & Grounds - Repair Or Replace | Use Published Labor Operation Time |