Problem Symptoms Table

WARNING: This page is about a different car, the 2002 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Problem Symptoms Table Front A/C (1 Of 2)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Problem Symptoms Table Front A/C (2 Of 2)

PROBLEM SYMPTOMS TABLE - REAR A/C

Symptom	Suspect Area
Whole functions of the rear A/C system does not operate	Integration control and panel ACC power source circuit
Air Flow Control: No blower operation	ACC power source circuit Rear heater main relay Rear blower motor Rear blower motor controller Integration control and panel
Air Flow Control: No blower control	Rear heater main relay Rear blower motor Rear blower motor controller Integration control and panel Solar sensor circuit
Air Flow Control: Insufficient air flow	Rear blower motor Rear blower resister
Temperature Control: No cool air comes out	Refrigerant volume Drive belt tension Refrigeration system inspection with manifold gauge set Compressor circuit Pressure switch circuit Water valve damper position sensor circuit Water valve damper control servomotor circuit Rear room temp, sensor circuit Ambient temp, sensor circuit Integration control and panel
Temperature Control: No warm air comes out	Water valve damper position sensor circuit Water valve damper control servomotor circuit Rear room temp, sensor circuit Ambient temp, sensor circuit Rear evaporator temp, sensor circuit Integration control and panel
Temperature Control: Output air is warmer or cooler that the set temperature or response is slow	Refrigerant volume Drive belt tension Refrigeration system inspection with manifold gauge set Cooling fan system Solar sensor circuit Rear room temp, sensor circuit Ambient temp, sensor circuit Rear evaporator temp, sensor circuit Water valve damper position sensor circuit Water valve damper control servomotor circuit Condenser Evaporator Heater radiator Expansion valve Integration control and panel
Temperature Control: No temperature control (only Max. cool or Max. warm)	Rear room temp, sensor circuit Ambient temp, sensor circuit Water valve damper position sensor circuit Water valve damper control servomotor circuit Integration control and panel