DTC B13AC
Diagnostic Instructions Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Review Strategy Based Diagnosis for an overview of the diagnostic approach. Diagnostic Procedure Instructions provides an overview of each diagnostic category. DTC Descriptors DTC B13AC Lane Departure Warning Indicator Control For symptom byte information, refer to Symptom Byte List. Diagnostic Fault Information
| Circuit Number | Circuit Function | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performan |
|---|---|---|---|---|---|
| 3152 | Control | B13A3 14 | B13A3 14 | B13A3 12 | — |
| 1851 | Ground | — | B13A3 14 | — | — |
| 1. Lane keep assist cannot be disabled using the lane keep assist switch |
Circuit/System Description The lane keep assist indicator is part of the S86 Vehicle Stability Control System Switch. The K9 Body Control Module controls the indicator using control circuit 3152 and the indicator receives a constant ground on ground circuit 1851. When the lane keep assist system is enabled, the K9 Body Control Module applies PWM voltage to circuit 3152, which will illuminate the indicator. Conditions for Running the DTC Ignition ON Conditions for Setting the DTC B13A3 12 circuit 3152 is shorted to voltage B13A3 14 circuit 3152 is shorted to ground circuit 3152 has an open/high resistance Action Taken When the DTC Sets No action is taken. Conditions for Clearing the DTC The condition for setting the DTC is no longer present. Reference Information Reference Information Schematic Reference Driver Assistance Systems Schematics Connector End View Reference Master Electrical Component List Description and Operation Lane Keep Assist Description and Operation Electrical Information Reference Circuit Testing Connector Repairs Testing for Intermittent Conditions and Poor Connections Wiring Repairs Scan Tool Reference Control Module References for scan tool information Circuit/System Testing
- Ignition OFF, disconnect the X3 connector at the K9 Body Control Module, ignition ON.
- Verify the lane keep assist indicator is not illuminated. ⇒ If the indicator is illuminated 2.1. Test circuit 3152 for a short to voltage. ⇒ If a short to voltage is found, repair the fault on the circuit. ⇓ If a short to voltage is not found 2.2. Replace the S86 Vehicle Stability Control System Switch. ⇓ If the indicator is not illuminated
- Connect a 3 A fused jumper wire between control circuit terminal 13 and B+.
- Verify the lane keep assist indicator is illuminated. ⇓ If the indicator is not illuminated 4.1. Test circuit 1851 for an open/high resistance. ⇒ If an open/high resistance is found, repair the fault on the circuit or the ground connection. ⇓ If an open/high resistance is not found 4.2. Test circuit 3152 for a short to ground. ⇒ If a short to ground is found, repair the fault on the circuit. ⇓ If an open/high resistance is not found 4.3. Test circuit 3152 for an open/high resistance. ⇒ If an open/high resistance is found, repair the fault on the circuit. ⇓ If an open/high resistance is not found 4.4. Replace the S86 Vehicle Stability Control System Switch. ⇒ If the indicator is illuminated
- Replace the K9 Body Control Module. Repair Instructions Perform the Diagnostic Repair Verification after completing the repair. Driver Assistance Systems Component Replacement Reference Control Module References for control module replacement, programming, and setup.