2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 319
Relay Test
1. Ignition OFF, disconnect the KR5 rear defogger relay.
2. Test for 60-180 ohm between terminals 85 and 86.
瀚慖f not within the specified range, replace the KR5 rear defogger relay.
3. Test for infinite resistance between the following terminals:
* 30 and 86
* 30 and 87
* 30 and 85
* 85 and 87
瀚慖f not the specified value, replace the KR5 rear defogger relay.
4. Install a 25A fused jumper wire between relay terminal 86 and 12V. Install a jumper wire between relay terminal 85 and ground. Test for less
than 2 ohm between terminals 30 and 87.
瀚慖f greater than the specified range, replace the KR5 rear defogger relay.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Relay Replacement (Attached to Wire Harness) (See: Power and Ground Distribution/Power Distribution Relay/Service and Repair/Relay
Replacement (Attached to Wire Harness))Relay Replacement (Within an Electrical Center) (See: Power and Ground Distribution/Power
Distribution Relay/Service and Repair/Relay Replacement (Within an Electrical Center))
* Control Module References (See: Testing and Inspection/Programming and Relearning) for HVAC control module replacement, setup and
programming
B291A
DTC B291A
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptor
DTC B291A 39
- Content Theft Deterrent Assembly Internal Malfunction
Circuit/System Description
The content theft deterrent intrusion/inclination sensor performers an internal self-check to determine it is functioning properly.
Conditions for Running the DTC
* The ignition is OFF.
* The vehicle is in Park.
Conditions for Setting the DTC
The body control module (BCM) detects an internal failure within the content theft deterrent intrusion/inclination sensor.
Action Taken When the DTC Sets
The intrusion and inclination output is disabled.
Conditions for Clearing the DTC
* A current DTC is cleared when the conditions for setting the DTC are no longer present.
