Problem Symptoms Table
HINT:
- Use the table below to help determine the cause of the problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts if necessary.
- Inspect the fuses and relays related to this system before inspecting the suspected areas below.
Air Conditioning System (for Manual Air Conditioning System)
PROBLEM SYMPTOMS CHART
| Symptom | Suspected Area | See page | ||||
|---|---|---|---|---|---|---|
| All functions of the A/C system do not operate. | IG power source circuit | IG POWER SOURCE CIRCUIT | ||||
| Back-up power source circuit | BACK-UP POWER SOURCE CIRCUIT | |||||
| A/C amplifier | AIR CONDITIONING AMPLIFIER | |||||
| Air Flow Control: No blower operation | Blower motor circuit | BLOWER MOTOR CIRCUIT | ||||
| A/C amplifier | AIR CONDITIONING AMPLIFIER | |||||
| Air Flow Control: No blower control | Blower motor circuit | BLOWER MOTOR CIRCUIT | ||||
| A/C amplifier | AIR CONDITIONING AMPLIFIER | |||||
| Air Flow Control: Insufficient air flow | Blower motor circuit | BLOWER MOTOR CIRCUIT | ||||
| A/C amplifier | AIR CONDITIONING AMPLIFIER | |||||
| Temperature Control: No cool air comes out.(2) | Refrigerant volume | - | ||||
| Refrigerant pressure | REFRIGERANT | |||||
| Pressure sensor circuit | DTC B1423 PRESSURE SENSOR CIRCUIT | |||||
| Compressor solenoid circuit | DTC B1451 COMPRESSOR SOLENOID CIRCUIT | |||||
| Evaporator temperature sensor circuit | DTC B1413 EVAPORATOR TEMPERATURE SENSOR CIRCUIT | |||||
| Ambient temperature sensor circuit | DTC B1412 AMBIENT TEMPERATURE SENSOR CIRCUIT | |||||
| Heater control switch circuit | HEATER CONTROL SWITCH CIRCUIT | |||||
| Air mix damper control cable | DISASSEMBLY | |||||
| Expansion valve | DISASSEMBLY | |||||
| A/C amplifier | AIR CONDITIONING AMPLIFIER | |||||
| Temperature Control: No warm air comes out. | Evaporator temperature sensor circuit(2) | DTC B1413 EVAPORATOR TEMPERATURE SENSOR CIRCUIT | ||||
| Ambient temperature sensor circuit(2) | DTC B1412 AMBIENT TEMPERATURE SENSOR CIRCUIT | |||||
| Generator signal circuit(1) | GENERATOR SIGNAL CIRCUIT | |||||
| Headlight signal circuit(1) | HEADLIGHT SIGNAL CIRCUIT | |||||
| PTC heater circuit(1) | PTC HEATER CIRCUIT | |||||
| Engine coolant temperature sensor circuit (for 2AZ-FE) | DTC P0115 ENGINE COOLANT TEMPERATURE CIRCUIT MALFUNCTION; DTC P0117 ENGINE COOLANT TEMPERATURE CIRCUIT LOW INPUT; DTC P0118 ENGINE COOLANT TEMPERATURE CIRCUIT HIGH INPUT | |||||
| Engine coolant temperature sensor circuit (for 2ZR-FE) | FAIL-SAFE | |||||
| CAN communication system | HOW TO PROCEED WITH TROUBLESHOOTING | |||||
| Air mix damper control cable | DISASSEMBLY | |||||
| A/C amplifier | AIR CONDITIONING AMPLIFIER | |||||
| ECM (for 2AZ-FE) | REMOVAL | |||||
| ECM (for 2ZR-FE) | INSTALLATION | |||||
| Temperature Control: Output air is warmer or cooler than the set temperature or response is slow. | Refrigerant volume(2) | - | ||||
| Refrigerant pressure(2) | REASSEMBLY | |||||
| Ambient temperature sensor circuit(2) | DTC B1412 AMBIENT TEMPERATURE SENSOR CIRCUIT | |||||
| Generator signal circuit(1) | GENERATOR SIGNAL CIRCUIT | |||||
| Headlight signal circuit(1) | HEADLIGHT SIGNAL CIRCUIT | |||||
| PTC heater circuit(1) | PTC HEATER CIRCUIT | |||||
| Engine coolant temperature sensor circuit (for 2AZ-FE) | DTC P0115 ENGINE COOLANT TEMPERATURE CIRCUIT MALFUNCTION; DTC P0117 ENGINE COOLANT TEMPERATURE CIRCUIT LOW INPUT; DTC P0118 ENGINE COOLANT TEMPERATURE CIRCUIT HIGH INPUT | |||||
| Engine coolant temperature sensor circuit (for 2ZR-FE) | FAIL-SAFE | |||||
| CAN communication system | HOW TO PROCEED WITH TROUBLESHOOTING | |||||
| Air mix damper control cable | DISASSEMBLY | |||||
| Radiator unit sub-assembly | DISASSEMBLY | |||||
| Expansion valve(2) | DISASSEMBLY | |||||
| A/C amplifier | AIR CONDITIONING AMPLIFIER | |||||
| ECM (for 2AZ-FE) | REMOVAL | |||||
| ECM (for 2ZR-FE) | INSTALLATION | |||||
| Temperature Control: No temperature control (only Max. cool or Max. hot) | Ambient temperature sensor circuit(2) | DTC B1412 AMBIENT TEMPERATURE SENSOR CIRCUIT | ||||
| Evaporator temperature sensor circuit(2) | DTC B1413 EVAPORATOR TEMPERATURE SENSOR CIRCUIT | |||||
| Heater control switch circuit | HEATER CONTROL SWITCH CIRCUIT | |||||
| Generator signal circuit(1) | GENERATOR SIGNAL CIRCUIT | |||||
| Headlight signal circuit(1) | HEADLIGHT SIGNAL CIRCUIT | |||||
| PTC heater circuit(1) | PTC HEATER CIRCUIT | |||||
| Engine coolant temperature sensor circuit (for 2AZ-FE) | DTC P0115 ENGINE COOLANT TEMPERATURE CIRCUIT MALFUNCTION; DTC P0117 ENGINE COOLANT TEMPERATURE CIRCUIT LOW INPUT; DTC P0118 ENGINE COOLANT TEMPERATURE CIRCUIT HIGH INPUT | |||||
| Engine coolant temperature sensor circuit (for 2ZR-FE) | FAIL-SAFE | |||||
| CAN communication system | HOW TO PROCEED WITH TROUBLESHOOTING | |||||
| Air mix damper control cable | DISASSEMBLY | |||||
| A/C amplifier | AIR CONDITIONING AMPLIFIER | |||||
| ECM (for 2AZ-FE) | REMOVAL | |||||
| ECM (for 2ZR-FE) | INSTALLATION | |||||
| No air inlet control | Recirculation damper servo motor circuit | REASSEMBLY | ||||
| A/C amplifier | AIR CONDITIONING AMPLIFIER | |||||
| No air flow mode control | No. 2 heater control cable | DISASSEMBLY | ||||
| Engine idle up does not occur, or is continuous. | Compressor solenoid circuit(2) | DTC B1451 COMPRESSOR SOLENOID CIRCUIT | ||||
| A/C amplifier | AIR CONDITIONING AMPLIFIER | |||||
| ECM (for 2AZ-FE) | REMOVAL | |||||
| ECM (for 2ZR-FE) | INSTALLATION | |||||
| CAN communication system | HOW TO PROCEED WITH TROUBLESHOOTING | |||||
| A/C indicator blinks.(2) | Compressor solenoid circuit | AIR CONDITIONING AMPLIFIER | ||||
| A/C amplifier | AIR CONDITIONING AMPLIFIER | |||||
| Diagnostic trouble codes are not recorded. Set mode is cleared when ignition switch is turned off.(2) | Back-up power source circuit | BACK-UP POWER SOURCE CIRCUIT | ||||
| A/C amplifier | AIR CONDITIONING AMPLIFIER | |||||
|
||||||