DTC B1A91-31: Speed/Position Sensor A - No signal: Action
- Refer to the appropriate system wiring diagrams and check the roof opening panel control module power and ground circuits for open circuit, high resistance
- Refer to the appropriate system wiring diagrams and check the LIN bus circuit for short circuit to ground, short circuit to power, open circuit, high resistance
- Using the manufacturer approved diagnostic system, perform routine - Sunroof Calibration (0x2039). Clear the DTCs and retest. If the fault persists, install a new roof opening panel control module