Problem Symptoms Table
Front A/C
PROBLEM SYMPTOMS CHART
| Symptom | Suspected area | See |
|---|---|---|
| Entire A/C system does not operate | 1. Heater control panel | INTEGRATION CONTROL AND PANEL |
| 2. A/C amplifier assembly | TERMINALS OF ECU | |
| 3. Wire harness or connector | - | |
| Air Flow Control: No blower operate | 1. Cooling unit motor sub-assembly w/fan | BLOWER MOTOR |
| 2. Heater control panel | INTEGRATION CONTROL AND PANEL | |
| 3. A/C amplifier assembly | TERMINALS OF ECU | |
| 4. Wire harness or connector | - | |
| Air Flow Control: No blower control | 1. Cooling unit motor sub-assembly w/fan | BLOWER MOTOR |
| 2. Heater control panel | INTEGRATION CONTROL AND PANEL | |
| 3. A/C amplifier assembly | TERMINALS OF ECU | |
| 4. Wire harness or connector | - | |
| Air Flow Control: Insufficient air output | 1. Cooling unit motor sub-assembly w/fan | BLOWER MOTOR |
| 2. Heater control panel | INTEGRATION CONTROL AND PANEL | |
| 3. A/C amplifier assembly | TERMINALS OF ECU | |
| 4. Wire harness or connector | - | |
| Temperature Control: No cool air comes out | 1. Volume of refrigerant | REFRIGERANT |
| 2. Refrigerant pressure | REFRIGERANT | |
| 3. w/ Motor compressor assembly | ELECTRIC INVERTER COMPRESSOR | |
| 4. A/C pressure switch | PRESSURE SWITCH | |
| 5. Air mix control servomotor | AIR MIX CONTROL SERVO MOTOR | |
| 6. Heater control panel | INTEGRATION CONTROL AND PANEL | |
| 7. A/C amplifier assembly | TERMINALS OF ECU | |
| 8. Wire harness or connector | - | |
| Temperature Control: No warm air comes out | 1. Engine coolant volume | COOLANT |
| 2. Air mix control servomotor | AIR MIX CONTROL SERVO MOTOR | |
| 3. Heater control panel | INTEGRATION CONTROL AND PANEL | |
| 4. Heater radiator unit sub-assembly | REAR HEATER ASSEMBLY | |
| 5. A/C amplifier assembly | TERMINALS OF ECU | |
| 6. Wire harness or connector | - | |
| Temperature Control: Output air is warmer or cooler than set temperature or response is slow | 1. Heater control panel | INTEGRATION CONTROL AND PANEL |
| 2. Air mix control servomotor | AIR MIX CONTROL SERVO MOTOR | |
| 3. A/C amplifier assembly | TERMINALS OF ECU | |
| 4. Wire harness or connector | - | |
| Temperature Control: No temperature control | 1. Heater control panel | INTEGRATION CONTROL AND PANEL |
| 2. Air mix control servomotor | AIR MIX CONTROL SERVO MOTOR | |
| 3. A/C amplifier assembly | TERMINALS OF ECU | |
| 4. Wire harness or connector | - | |
| No air inlet control | 1. Air inlet control servomotor | AIR INLET CONTROL SERVO MOTOR |
| 2. Heater control panel | INTEGRATION CONTROL AND PANEL | |
| 3. A/C amplifier assembly | TERMINALS OF ECU | |
| 4. Wire harness or connector | - | |
| No air outlet control | 1. Air outlet control servomotor | AIR OUTLET CONTROL SERVO MOTOR |
| 2. Heater control panel | INTEGRATION CONTROL AND PANEL | |
| 3. A/C amplifier assembly | TERMINALS OF ECU | |
| 4. Wire harness or connector | - | |
| Engine idle up does not occur, or is continuous | 1. w/ Motor compressor assembly | ELECTRIC INVERTER COMPRESSOR |
| 2. Heater control panel | INTEGRATION CONTROL AND PANEL | |
| 3. A/C amplifier assembly | TERMINALS OF ECU | |
| 4. Wire harness or connector | - | |
| Displayed set temperature value does not match with operation of temperature control switch | 1. A/C amplifier assembly | TERMINALS OF ECU |
| Brightness does not change when rheostat volume or light control switch is turned | 1. Wire harness or connector | - |
Rear Heater
REAR HEATER SYMPTOM REFERENCE
| Symptom | Suspected area | See |
|---|---|---|
| Entire A/C system does not operate | 1. Rear heater relay | HEATER RELAY (FOR REAR HEATER) |
| 2. Rear heater main switch | REAR BLOWER MAIN SWITCH | |
| 3. Rear heater blower switch | REAR BLOWER SWITCH | |
| 4. Wire harness or connector | - | |
| Air Flow Control: No blower operation | 1. Rear heater relay | HEATER RELAY (FOR REAR HEATER) |
| 2. Rear heater main switch | REAR BLOWER MAIN SWITCH | |
| 3. Rear heater blower resistor | REAR BLOWER RESISTOR | |
| 4. Rear heater blower switch | REAR BLOWER SWITCH | |
| 5. Rear heater blower motor sub-assembly | REAR BLOWER MOTOR | |
| 6. Rear heater blower fan sub-assembly | REAR HEATER ASSEMBLY | |
| 7. Wire harness or connector | - | |
| Air Flow Control: No blower control | 1. Rear heater relay | HEATER RELAY (FOR REAR HEATER) |
| 2. Rear heater main switch | REAR BLOWER MAIN SWITCH | |
| 3. Rear heater blower resistor | REAR BLOWER RESISTOR | |
| 4. Rear heater blower switch | REAR BLOWER SWITCH | |
| 5. Wire harness or connector | - | |
| Air Flow Control: Insufficient air out | 1. Rear heater relay | HEATER RELAY (FOR REAR HEATER) |
| 2. Rear heater main switch | REAR BLOWER MAIN SWITCH | |
| 3. Rear heater blower resistor | REAR BLOWER RESISTOR | |
| 4. Rear heater blower switch | REAR BLOWER SWITCH | |
| 5. Wire harness or connector | - | |
| Temperature Control: Warm air does not come out | 1. Engine coolant volume | COOLANT |
| 2. Rear heater blower resistor | REAR BLOWER RESISTOR | |
| 3. Rear heater blower switch | REAR BLOWER SWITCH | |
| 4. Rear heater unit sub-assembly | REAR HEATER ASSEMBLY | |
| 5. Wire harness or connector | - |