Test K
PINPOINT TEST K: DTC B2488 - THUMB-WHEEL SWITCH VOLTAGE OUT OF RANGE HIGHTest K1:
Test K1-K2:
Normal Operation
The climate controlled seat module (CCSM) outputs voltage to the climate controlled seat switch thumb-wheel on circuit 1018 (LG/OG) (driver) or 579 (BK/OG) (passenger). Based on the setting of the climate controlled seat switch, the voltage is then output to the CCSM on circuit 1550 (WH/OG) to request the desired temperature setting of the seat.
Possible Causes
Thumb-wheel switch voltage out of range can be caused by:
- wiring, terminals, or connectors.
- climate controlled seat switch.
- CCSM.