| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000ZPCX |
| Model Year Start: 2017 | Model: Sienna | Prod Date Range: [08/2016 - ] |
| Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: PROBLEM SYMPTOMS TABLE; 2017 - 2020 MY Sienna [08/2016 - ] | ||
PROBLEM SYMPTOMS TABLE
HINT:
- Use the table below to help determine the cause of 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 as necessary.
- Inspect the fuses and relays related to this system before inspecting the suspected areas below.
Front Air Conditioning System
|
Symptom |
Suspected Area |
See page |
|---|---|---|
|
All functions of the A/C system do not operate |
IG power source circuit |
|
|
Back-up power source circuit |
|
|
|
Air conditioning control panel circuit |
|
|
|
Air conditioning amplifier |
|
|
|
Quick heater assembly does not operate |
PTC heater circuit |
|
|
Air conditioning amplifier |
|
|
|
Air flow control: No blower operation |
Blower motor circuit |
|
|
Air conditioning control panel circuit |
|
|
|
Air conditioning amplifier |
|
|
|
Air flow control: No blower control |
Blower motor circuit |
|
|
Air conditioning control panel circuit |
|
|
|
Air conditioning amplifier |
|
|
|
Air flow control: Insufficient air flow |
Blower motor circuit |
|
|
Air conditioning amplifier |
|
|
|
Temperature control: No cool air comes out |
Refrigerant volume |
- |
|
Refrigerant pressure |
|
|
|
Pressure sensor circuit |
|
|
|
Air conditioning compressor magnetic clutch circuit |
|
|
|
Compressor lock sensor circuit |
|
|
|
Compressor solenoid circuit |
|
|
|
Air mix damper control servo motor circuit (for Driver side) |
|
|
|
Air mix damper control servo motor circuit (for Passenger side) |
|
|
|
Evaporator temperature sensor circuit |
|
|
|
Room temperature sensor circuit |
|
|
|
Ambient temperature sensor circuit |
|
|
|
Air conditioning control panel circuit |
|
|
|
Expansion valve |
|
|
|
Air conditioning amplifier |
|
|
|
ECM |
|
|
|
Temperature control: No warm air comes out |
Air mix damper control servo motor circuit (for Driver side) |
|
|
Air mix damper control servo motor circuit (for Passenger side) |
|
|
|
Evaporator temperature sensor circuit |
|
|
|
Room temperature sensor circuit |
|
|
|
Ambient temperature sensor circuit |
|
|
|
Air conditioning control panel circuit |
|
|
|
Air conditioning amplifier |
|
|
|
ECM |
|
|
|
Temperature control: Output air is warmer or cooler than the set temperature or response is slow |
Refrigerant volume |
- |
|
Refrigerant pressure |
|
|
|
Air conditioning compressor magnetic clutch circuit |
|
|
|
Compressor lock sensor circuit |
|
|
|
Compressor solenoid circuit |
|
|
|
Driver side solar sensor short circuit |
|
|
|
Front passenger side solar sensor short circuit |
|
|
|
Room temperature sensor circuit |
|
|
|
Ambient temperature sensor circuit |
|
|
|
Air mix damper control servo motor circuit (for Driver side) |
|
|
|
Air mix damper control servo motor circuit (for Passenger side) |
|
|
|
Air inlet damper control servo motor circuit |
|
|
|
Air conditioning control panel circuit |
|
|
|
Radiator unit sub-assembly |
|
|
|
Expansion valve |
|
|
|
Air conditioning amplifier |
|
|
|
ECM |
|
|
|
Temperature control: No temperature control (only Max. cool or Max. warm) |
Air mix damper control servo motor circuit (for Driver side) |
|
|
Air mix damper control servo motor circuit (for Passenger side) |
|
|
|
Room temperature sensor circuit |
|
|
|
Ambient temperature sensor circuit |
|
|
|
Evaporator temperature sensor circuit |
|
|
|
Driver side solar sensor short circuit |
|
|
|
Front passenger side solar sensor short circuit |
|
|
|
Air conditioning control panel circuit |
|
|
|
Air conditioning amplifier |
|
|
|
No air inlet control |
Air inlet damper control servo motor circuit |
|
|
Air conditioning control panel circuit |
|
|
|
Air conditioning amplifier |
|
|
|
No air flow mode control |
Air outlet damper control servo motor circuit |
|
|
Air conditioning control panel circuit |
|
|
|
Air conditioning amplifier |
|
|
|
Engine does not start for heater |
Air conditioning compressor magnetic clutch circuit |
|
|
Compressor lock sensor circuit |
|
|
|
Compressor solenoid circuit |
|
|
|
Air conditioning amplifier |
|
|
|
Blinking of A/C indicator |
Compressor solenoid circuit |
|
|
Air conditioning amplifier |
|
|
|
Diagnostic trouble codes (DTCs) are not recorded. Set mode is cleared when ignition switch is off. |
Back-up power source circuit |
|
|
Air conditioning amplifier |
|
![2016 - 2020 MY Sienna [12/2015 - ]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: IG Power Source Circuit](/t3Portal/stylegraphics/info.gif)
Rear Air Conditioning System
|
Symptom |
Suspected Area |
See page |
|---|---|---|
|
All functions of the A/C system do not operate |
Air conditioning amplifier |
|
|
B14B3 |
|
|
|
No. 2 air conditioning control panel assembly |
|
|
|
Air Flow Control: No blower operation |
Rear blower motor circuit |
|
|
No. 2 air conditioning control panel assembly |
|
|
|
Air conditioning amplifier |
|
|
|
Air Flow Control: No blower control |
Rear blower motor circuit |
|
|
No. 2 air conditioning control panel assembly |
|
|
|
Air conditioning amplifier |
|
|
|
Air Flow Control: Insufficient air out |
Rear blower motor circuit |
|
|
No. 2 air conditioning control panel assembly |
|
|
|
Air conditioning amplifier |
|
|
|
Temperature Control: Cool air does not come out |
Volume of refrigerant |
|
|
Drive belt tension |
- |
|
|
Refrigerant pressure |
|
|
|
Air conditioning compressor magnetic clutch circuit |
|
|
|
Pressure sensor circuit |
|
|
|
Ambient temperature sensor circuit |
|
|
|
Rear evaporator temperature sensor circuit |
|
|
|
No. 2 air conditioning control panel assembly |
|
|
|
Air conditioning amplifier |
|
|
|
Temperature Control: Warm air does not come out |
Rear air mix damper control servo motor circuit |
|
|
Ambient temperature sensor circuit |
|
|
|
Rear room temperature sensor circuit |
|
|
|
Rear evaporator temperature sensor circuit |
|
|
|
No. 2 air conditioning control panel assembly |
|
|
|
Air conditioning amplifier |
|
|
|
Heater radiator |
|
|
|
Temperature Control: Output air is warmer or cooler than the set temperature or response is slow |
Rear room temperature sensor circuit |
|
|
Ambient temperature sensor circuit |
|
|
|
Rear air mix damper control servo motor circuit |
|
|
|
Air conditioning amplifier |
|
|
|
Temperature Control: No temperature control (only Max. cool or Max. hot) |
Rear air mix damper control servo motor circuit |
|
|
No. 2 air conditioning control panel assembly |
|
|
|
Air conditioning amplifier |
|
|
|
No air outlet control |
Rear air outlet damper control servo motor circuit |
|
|
No. 2 air conditioning control panel assembly |
|
|
|
Air conditioning amplifier |
|
|
|