Test W: Insufficient Air Conditioning (A/C) Cooling
PINPOINT TEST W: INSUFFICIENT AIR CONDITIONING (A/C) COOLINGW1-W3:
W3-W4:
W4-W6:
W6-W7:
Normal Operation
Under normal operation, the automatic temperature control (ATC) solenoid and manifold receives a ground from the electronic automatic temperature control (EATC) module through circuit RH226 (WH/VT). When the heater control valve vacuum solenoid is to be energized, the ATC solenoid and manifold receives voltage from the EATC module through circuit CH224 (BU/OG).
Possible Causes
- An open or short to ground in circuit CH224 (BU/OG)
- ATC solenoid and manifold
- EATC module
- Manual climate control assembly
- Heater control valve
- Stuck or bound linkage or door
- Leaking or plugged vacuum hose