The B1490 code on your 2021 Volkswagen Tiguan indicates a fault in the rear wiper motor circuit. This code affects your Tiguan's rear window wiper system, signaling the body control module has detected an electrical issue with the rear wiper motor.
Understanding B1490 on Volkswagen Tiguan
The rear wiper motor is controlled by the BCM through the wiper stalk and operates independently from the front wipers. Code B1490 indicates a circuit fault - open circuit, short circuit, or the motor isn't responding to commands properly.
Common Symptoms
- Rear wiper doesn't work
- Rear wiper moves slowly
- Wiper runs continuously (stuck on)
- Wiper stops mid-wipe
- Wiper doesn't return to park position
- Rear washer works but wiper doesn't
Primary Causes
- Rear wiper motor failure
- Wiper motor park switch fault
- Wiring damage in hatch
- Corroded motor connector
- Wiper arm binding or frozen
- BCM rear wiper driver fault
Diagnostic Procedure for 2021 Tiguan
Using VCDS or VW scan tool, command rear wiper operation. Listen for motor operation. Check for voltage at motor when commanded. Test motor by applying direct power. Check park switch operation - motor should stop at park position. Inspect wiring through hatch, especially at hinge area. Check for binding or ice on wiper arm.
Repair Solutions
Replace failed rear wiper motor. Repair wiring damage at hatch hinge. Clean corroded motor connector. Free binding or iced-up wiper arm. Replace rear wiper linkage if binding. Clear codes and verify wiper operates in all modes (intermittent, continuous, with washer).