2010 Cadillac Truck SRX AWD V6-3.0L Page 481
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
1. Ignition ON, observe the scan tool Exterior Left Rear Door Handle Switch parameter while pulling and releasing the B27LR door handle
switch - left rear exterior. The parameter should change between Active and Inactive.
瀚慖f the value is always Inactive or always Active, refer to Left rear Exterior Door Handle Inoperative.
2. Ignition ON, observe the scan tool Exterior Right Rear Door Handle Switch parameter while pulling and releasing the B27RR door handle
switch - right rear exterior. The parameter should change between Active and Inactive.
瀚慖f the value is always Inactive or always Active, refer to Right Rear Exterior Door Handle Inoperative.
Circuit/System Testing
Left Rear Exterior Door Handle Inoperative
1. Ignition OFF, disconnect the harness connector at the B27LR door handle switch-left rear exterior.
2. Ignition ON, verify the scan tool Exterior Left Rear Door Handle Switch parameter is Inactive:
瀚慖f not the specified value, test the signal circuit terminal 2 for a short to ground. If the circuit tests normal, replace the K84 keyless entry
control module.
3. Install a 3 A fused jumper wire between the signal circuit terminal 2 and ground. Verify the scan tool Exterior Left Rear Door Handle Switch
parameter is Active.
瀚慖f not the specified value, test the signal circuit terminal 2 for an open/high resistance. If the circuit tests normal, replace the K84 keyless
entry control module.
4. If all circuits test normal, test or replace the B27LR door handle switch-left rear exterior.
Right Rear Exterior Door Handle Inoperative
1. Ignition OFF, disconnect the harness connector at the B27RR door handle switch-right rear exterior.
2. Ignition ON, verify the scan tool Exterior Right Rear Door Handle Switch parameter is Inactive:
瀚慖f not the specified value, test the signal circuit terminal 2 for a short to ground. If the circuit tests normal, replace the K84 keyless entry
control module.
3. Install a 3 A fused jumper wire between the signal circuit terminal 2 and ground. Verify the scan tool Exterior Right Rear Door Handle
Switch parameter is Active.
瀚慖f not the specified value, test the signal circuit terminal 2 for an open/high resistance. If the circuit tests normal, replace the K84 keyless
entry control module.
4. If all circuits test normal, test or replace the B27RR door handle switch-right rear exterior.
Component Testing
Rear Door Handle Switch
1. Ignition OFF, disconnect the harness connector at the appropriate B27 Door Handle Switch - Rear.
2. With the switch in the open position, test for infinite resistance between the signal terminal 2 and the ground terminal 1.
瀚慖f not the specified value, replace the B27 Door Handle Switch - Rear.
3. With the switch in the closed position, test for less than 5 ohm between the signal terminal 2 and the ground terminal 1
瀚慖f greater than the specified range, replace the B27 Door Handle Switch - Rear.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Rear Side Door Outside Handle Replacement (See: Body and Frame/Doors, Hood and Trunk/Doors/Rear Door/Rear Door Handle/Rear
Door Exterior Handle/Service and Repair/Rear Side Door Outside Handle Replacement)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for the keyless entry control module replacement,
setup, and programming
