DTC B1157-4B: Blower Control "B" - Over temperature: Action
- Check for mechanical restriction or debris in seat blower
- Carry out on demand self test using manufacturer approved diagnostic system to confirm the fault is present
- Refer to the applicable SYSTEM WIRING DIAGRAM(S) and check the front seat climate control module - Circuit reference RH_FANS_RTN, Circuit reference RH_FANS_PWR - For short circuit to ground. Repair circuit as required, clear DTC and retest
- Carry out on demand self test using manufacturer approved diagnostic system to confirm rectification. Alternatively, carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system