Test S: Temp., Panel/Floor + Blower Motor Controls are Inoperative/Do Not Operate Using the Front/Rear Aux Climate Controls

PINPOINT TEST S: THE TEMPERATURE, PANEL/FLOOR AND BLOWER MOTOR CONTROLS ARE INOPERATIVE/DO NOT OPERATE CORRECTLY USING THE FRONT/REAR AUXILIARY CLIMATE CONTROLS

S1-S4:

S4-S6:

S6-S8:

S8-S9:

Normal Operation
Under normal operation, the panel/floor and cool/warm signal is received by the EATC module from the rear auxiliary control through circuit 1121 (DG/YE). The blower speed signal is received by the EATC from the rear auxiliary control through circuit 1125 (BN). Reference voltage for the auxiliary controls signal resistor is provided by the EATC module through circuit 1381 (WH/LB). Ground for the auxiliary controls signal resistor is provided by the EATC module through circuit 1377 (TN/LG).

Possible Causes
- An open in circuit 1377 (TN/LG), 1121 (DG/YE), 1125 (BN) or 1381 (WH/LB)
- A short to ground in circuit 1121 (DG/YE), 1125 (BN) or 1381 (WH/LB)
- A short to voltage in circuit 1121 (DG/YE), 1125 (BN) or 1377 (TN/LG)
- A short together circuits 1377 (TN/LG) and 1121 (DG/YE), 1125 (BN) or 1381 (WH/LB)
- A short together circuits 1121 (DG/YE) and 1125 (BN)
- Rear auxiliary control
- EATC module