2010 Cadillac CTS Sedan AWD V6-3.6L Page 584
* Headlamp leveling motor control terminal 1
* Headlamp leveling motor control terminal 2
* Headlamp leveling motor control terminal 3
* Headlamp leveling motor control terminal 4
瀚慖f greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal,
replace the headlamp control module.
瀚慖f less than the specified range, test the control circuit for a short to ground. If the circuit tests normal, replace the headlamp control
module.
4. Install the AFS 15 A fuse.
5. Ignition ON, scan tool OFF, headlamps ON, verify that a test lamp does not illuminate between each control circuit terminal listed below and
ground.
* Headlamp leveling motor control terminal 1
* Headlamp leveling motor control terminal 2
* Headlamp leveling motor control terminal 3
* Headlamp leveling motor control terminal 4
瀚慖f the test lamp illuminates, test the control circuit for a short to voltage. If the circuit tests normal, replace the headlamp control module.
6. If all circuits test normal, replace the headlamp assembly.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Headlamp Assembly or Headlamp Bulb and/or Cornering, Sidemarker, Park, Turn Signal Bulb Replacement (TT6) (See: Lighting and
Horns/Headlamp/Service and Repair/Removal and Replacement/Headlamp Assembly or Headlamp Bulb and/or Cornering, Sidemarker, Park,
Turn Signal Bulb Replacement (TT6))Headlamp Assembly or Headlamp Bulb and/or Cornering, Sidemarker, Park, Turn Signal Bulb
Replacement (TT7) (See: Lighting and Horns/Headlamp/Service and Repair/Removal and Replacement/Headlamp Assembly or Headlamp
Bulb and/or Cornering, Sidemarker, Park, Turn Signal Bulb Replacement (TT7))Headlamp Assembly or Headlamp Bulb and/or Cornering,
Sidemarker, Park, Turn Signal Bulb Replacement (TT8) (See: Lighting and Horns/Headlamp/Service and Repair/Removal and
Replacement/Headlamp Assembly or Headlamp Bulb and/or Cornering, Sidemarker, Park, Turn Signal Bulb Replacement (TT8))Headlamp
Assembly or Headlamp Bulb and/or Cornering, Sidemarker, Park, Turn Signal Bulb Replacement (Without TT6/TT7/TT8/T84/T85) (See:
Lighting and Horns/Headlamp/Service and Repair/Removal and Replacement/Headlamp Assembly or Headlamp Bulb and/or Cornering,
Sidemarker, Park, Turn Signal Bulb Replacement (Without TT6/TT7/TT8/T84/T8)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for headlamp control module replacement, setup,
and programming
B3440
DTC B3435 or B3440 (Base)
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 Descriptors
DTC B3435 00
- AHLD Left Servo Driver Circuit
DTC B3435 02
- AHLD Left Servo Driver Circuit Short to Ground
DTC B3435 39
- AHLD Left Servo Driver Circuit Internal Electronic Failure
DTC B3435 54
- AHLD Left Servo Driver Circuit Over Temperature
DTC B3440 00
- AHLD Right Servo Driver Circuit
