Toyota CH-R Service Manual: Problem Symptoms Table
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.
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
All functions of the air conditioning system do not operate |
IG power source circuit |
|
|
Back-up power source circuit |
|
|
|
LIN communication circuit |
|
|
|
Air conditioning amplifier assembly |
|
|
|
Air flow Control: No blower operation |
Blower motor circuit |
|
|
LIN communication circuit |
|
|
|
Air conditioning amplifier assembly |
|
|
|
Air flow control: No blower control |
Blower motor circuit |
|
|
LIN communication circuit |
|
|
|
Air conditioning amplifier assembly |
|
|
|
Air flow control: Insufficient air flow |
Blower motor circuit |
|
|
Air conditioning amplifier assembly |
|
|
|
Temperature control: No cool air comes out |
Refrigerant volume |
- |
|
Refrigerant pressure |
|
|
|
Air conditioner pressure sensor circuit |
|
|
|
LIN communication circuit |
|
|
|
Air mix damper control servo motor circuit (for driver side air mix) |
|
|
|
Air mix damper control servo motor circuit (for front passenger side air mix) |
|
|
|
Evaporator temperature sensor circuit |
|
|
|
Room temperature sensor circuit |
|
|
|
Ambient temperature sensor circuit |
|
|
|
Cooler expansion valve |
|
|
|
No. 1 air conditioning radiator damper servo sub-assembly (driver side air mix) |
|
|
|
No. 1 air conditioning radiator damper servo sub-assembly (front passenger side air mix) |
|
|
|
Air conditioning harness assembly |
|
|
|
Compressor with pulley assembly |
|
|
|
Air conditioning amplifier assembly |
|
|
|
ECM |
|
|
|
Temperature control: No warm air comes out |
LIN communication circuit |
|
|
Air mix damper control servo motor circuit (for driver side air mix) |
|
|
|
Air mix damper control servo motor circuit (for front passenger side air mix) |
|
|
|
Evaporator temperature sensor circuit |
|
|
|
Room temperature sensor circuit |
|
|
|
Ambient temperature sensor circuit |
|
|
|
No. 1 air conditioning radiator damper servo sub-assembly (driver side air mix) |
|
|
|
No. 1 air conditioning radiator damper servo sub-assembly (front passenger side air mix) |
|
|
|
Air conditioning harness assembly |
|
|
|
Air conditioning amplifier assembly |
|
|
|
ECM |
|
|
|
Temperature control: Output air is warmer or cooler than the set temperature or response is slow |
Refrigerant volume |
- |
|
Refrigerant pressure |
|
|
|
Solar sensor circuit |
|
|
|
Room temperature sensor circuit |
|
|
|
Ambient temperature sensor circuit |
|
|
|
LIN communication circuit |
|
|
|
Air mix damper control servo motor circuit (for driver side air mix) |
|
|
|
Air mix damper control servo motor circuit (for front passenger side air mix) |
|
|
|
Air inlet damper control servo motor circuit |
|
|
|
Heater radiator unit sub-assembly |
|
|
|
Cooler expansion valve |
|
|
|
No. 1 air conditioning radiator damper servo sub-assembly (driver side air mix) |
|
|
|
No. 1 air conditioning radiator damper servo sub-assembly (front passenger side air mix) |
|
|
|
No. 1 blower damper servo sub-assembly (fresh/recirculation) |
|
|
|
Air conditioning harness assembly |
|
|
|
Air conditioning amplifier assembly |
|
|
|
ECM |
|
|
|
Temperature control: No temperature control (only MAX COLD or MAX HOT) |
LIN communication circuit |
|
|
Air mix damper control servo motor circuit (for driver side air mix) |
|
|
|
Air mix damper control servo motor circuit (for front passenger side air mix) |
|
|
|
Room temperature sensor circuit |
|
|
|
Ambient temperature sensor circuit |
|
|
|
Evaporator temperature sensor circuit |
|
|
|
Solar sensor circuit |
|
|
|
No. 1 air conditioning radiator damper servo sub-assembly (driver side air mix) |
|
|
|
No. 1 air conditioning radiator damper servo sub-assembly (front passenger side air mix) |
|
|
|
Air conditioning harness assembly |
|
|
|
Air conditioning amplifier assembly |
|
|
|
Temperature control: Output air temperature is different between left and right registers (the set temperature is the same for both) |
Refrigerant volume |
- |
|
Refrigerant pressure |
|
|
|
Air mix damper control servo motor circuit (for driver side air mix) |
|
|
|
Air mix damper control servo motor circuit (for front passenger side air mix) |
|
|
|
Automatic light control sensor |
|
|
|
No. 1 air conditioning radiator damper servo sub-assembly (driver side air mix) |
|
|
|
No. 1 air conditioning radiator damper servo sub-assembly (front passenger side air mix) |
|
|
|
Air conditioning harness assembly |
|
|
|
Air conditioning amplifier assembly |
|
|
|
No air inlet control |
LIN communication circuit |
|
|
Air inlet damper control servo motor circuit |
|
|
|
No. 1 blower damper servo sub-assembly (fresh/recirculation) |
|
|
|
Air conditioning harness assembly |
|
|
|
Air conditioning amplifier assembly |
|
|
|
Quick heater assembly does not operate |
PTC heater circuit |
|
|
Air conditioning amplifier assembly |
|
|
|
Diagnostic trouble codes (DTCs) are not recorded. Set mode is cleared when the ignition switch is turned off |
Back-up power source circuit |
|
|
Air conditioning amplifier assembly |
|
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Initialization
INITIALIZATION
INITIALIZATION SERVO MOTOR
(a) Turn the ignition switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON.
(d) Press the A/C OFF switch.
(e) Turn the ...
Terminals Of Ecu
TERMINALS OF ECU
AIR CONDITIONING AMPLIFIER ASSEMBLY
HINT:
Check from the rear of the connector while it is connected to the air conditioning
amplifier assembly.
Terminal No.
(Sy ...
Other materials:
Toyota CH-R Service Manual > Smart Key System(for Entry Function): Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
Smart Key System (for Entry Function)
DTC No.
Detection Item
Link
B27A1
Open in Driver Side Electrical Antenna Circuit
B27A2
Open in Front Passenger Side Electrical A ...
Toyota CH-R Service Manual > Can Communication System: Check Bus 3 Line for Short to +B
DESCRIPTION
There may be a short circuit between one of the CAN bus lines and +B when no
resistance exists between terminal 6 (CA3H) of the central gateway ECU (network
gateway ECU) and terminal 16 (BAT) of the DLC3, or terminal 21 (CA3L) of the central
gateway ECU (network gateway ECU) and t ...
Toyota C-HR (AX20) 2023-2026 Owner's Manual
Toyota CH-R Owners Manual
- For safety and security
- Instrument cluster
- Operation of each component
- Driving
- Interior features
- Maintenance and care
- When trouble arises
- Vehicle specifications
- For owners
Toyota CH-R Service Manual
- Introduction
- Maintenance
- Audio / Video
- Cellular Communication
- Navigation / Multi Info Display
- Park Assist / Monitoring
- Brake (front)
- Brake (rear)
- Brake Control / Dynamic Control Systems
- Brake System (other)
- Parking Brake
- Axle And Differential
- Drive Shaft / Propeller Shaft
- K114 Cvt
- 3zr-fae Battery / Charging
- Networking
- Power Distribution
- Power Assist Systems
- Steering Column
- Steering Gear / Linkage
- Alignment / Handling Diagnosis
- Front Suspension
- Rear Suspension
- Tire / Wheel
- Tire Pressure Monitoring
- Door / Hatch
- Exterior Panels / Trim
- Horn
- Lighting (ext)
- Mirror (ext)
- Window / Glass
- Wiper / Washer
- Door Lock
- Heating / Air Conditioning
- Interior Panels / Trim
- Lighting (int)
- Meter / Gauge / Display
- Mirror (int)
- Power Outlets (int)
- Pre-collision
- Seat
- Seat Belt
- Supplemental Restraint Systems
- Theft Deterrent / Keyless Entry
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