2010 Cadillac CTS Sedan AWD V6-3.6L Page 629
* Signal circuit terminal 3
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the S84D door lock/window switch-driver.
4. If all circuits test normal, test or replace the B27D door handle switch - driver.
Passenger Door Handle Switch Malfunction
1. Ignition OFF, disconnect the harness connector at the B27P door handle switch - passenger.
2. Test for less than 30ohm between the ground circuit terminal listed below and ground.
* Ground circuit terminal 1
* Ground circuit terminal 4
瀚慖f greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, test for greater than 9 V between the signal circuit terminal listed below and ground.
* Signal circuit terminal 2
* Signal circuit terminal 3
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the S84P door lock/window switch-passenger.
4. If all circuits test normal, test or replace the B27P door handle switch - passenger.
Component Testing
1. Ignition OFF, disconnect the harness connector at the appropriate B27 door handle switch.
2. Test for infinite resistance between the signal terminal 2 and the ground terminal 1 with the switch in the open position.
瀚慖f not the specified value, replace the B27 door handle switch.
3. Test for less than 2 ohm between the signal terminal 2 and the ground terminal 1 with the switch in the closed position.
4. If greater than the specified range, replace the B27 door handle switch.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Front Side Door Outside Handle Replacement (Front and Rear Doors with ATH) (See: Body and Frame/Doors, Hood and
Trunk/Doors/Front Door/Front Door Handle/Front Door Exterior Handle/Service and Repair)Front Side Door Outside Handle Replacement
(Front Door with ATH) (See: Body and Frame/Doors, Hood and Trunk/Doors/Front Door/Front Door Handle/Front Door Exterior
Handle/Service and Repair)Front Side Door Outside Handle Replacement (Without ATH) (See: Body and Frame/Doors, Hood and
Trunk/Doors/Front Door/Front Door Handle/Front Door Exterior Handle/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for door lock/window switch-driver or door
lock/window switch-passenger replacement, setup, and programming
With UHA/UHF
DTC B3849 (With UHA/UHF)
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 B3849 00
- Exterior Door Handle Switch Circuit
Diagnostic Fault Information
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