Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Retrieving Codes
Using Adapter Harness (965 589 00 40 00), connect Hand-Held Tester (965 589 00 01 00) to data link connector. Retrieve and record codes from combination control module using manufacturers instructions. Perform appropriate system test. See DTC IDENTIFICATION CHART table.
| Code | Possible Cause | Step |
| B1000 | Combination Control Module (CCM) | Replace CCM |
| B1010 | Low Voltage | Check charging system and repair as neccessary. |
| B1011 | Excess Voltage | Check charging system and repair as neccessary. |
| B1013 | Circuit 15R | TEST 2 and TEST 3 |
| B1014 | Circuit 49 Travel Direction (No Voltage Circuit 15) | TEST 26 |
| B1021 | CAN Data Line Communication With PSE (Pneumatic System Equipment) Interrupted | Check CAN data lines between Pneumatic System Equipment (PSE) control module and combination control module. See WIRING DIAGRAMS in DOOR LOCKS - PNEUMATIC & POWER article. |
| B1024 | CAN Low-Interior Bus Circuit Open Or Short | Check CAN data lines between Pneumatic System Equipment (PSE) control module and combination control module. See WIRING DIAGRAMS in DOOR LOCKS - PNEUMATIC & POWER article. |
| B1025 | CAN High-Interior Bus Circuit Open Or Short | Check CAN data lines between Pneumatic System Equipment (PSE) control module and combination control module. See WIRING DIAGRAMS in DOOR LOCKS - PNEUMATIC & POWER article. |
| B1115 | Rear Defogger Switch Short To Voltage | TEST 22 |
| B1217 | Rain Sensor Communication Interrupted | TEST 16 |
| B1406 | Dome Light Control Wire Short To Voltage | TEST 18 |
| B1407 | Entrance/Exit Light Short To Voltage | TEST 19 |
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.