DESCRIPTION If the
temperature of the air that blows from the left and right front
registers differs, even though the same temperature is set for both
sides, the following factors may be the cause. |
Symptom | Factor | |
Temperature of outlet air is cooler on left or right side
- (when same temperature set for both sides)
|
- Cooler compressor assembly (compressor solenoid) malfunction
- Refrigerant volume (low)
- Mechanical locking of damper and damper link
- Automatic light control sensor malfunction
- Harness or connector
| | Temperature of outlet air is warmer on left or right side
- (when same temperature set for both sides)
|
- Mechanical locking of damper and damper link
- Blockage in heater radiator unit sub-assembly
- Harness or connector
| WIRING DIAGRAM
 CAUTION / NOTICE / HINT
NOTICE:
PROCEDURE |
1. | CHECK WHEN MALFUNCTION OCCURS |
| Result |
Proceed to | | When using cooling function |
A | | When using heater function |
B |
| B |
 | GO TO STEP 6 |
|
A |
 | |
| 2. |
PERFORM REFRIGERANT SHORTAGE CHECK | (a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG). (c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Air Conditioner / Utility / Refrigerant Gas Volume Check. Body Electrical > Air Conditioner > Utility
|
Tester Display | | Refrigerant Gas Volume Check |
(e)
Check that the following conditions are met and perform the refrigerant
shortage check according to the display on the Techstream. Measurement Condition: |
Item | Condition | |
A/C switch | On | |
Ambient temperature* |
0 to 49°C (32 to 120°F) | |
Blower speed | HI |
*: If the ambient temperature is not within the range shown, do not perform this check. |
Result | Amount of Refrigerant | |
Refrigerant correct | Correct | |
Refrigerant shortage |
Insufficient | OK: "Refrigerant correct" is displayed on the Techstream.
| NG |
| CHARGE SYSTEM WITH REFRIGERANT |
|
OK | |
| |
| 3. |
PERFORM ACTIVE TEST USING TECHSTREAM | (a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG). (c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Air Conditioner / Active Test.
(e) Perform the Active Test according to the display on the Techstream. Body Electrical > Air Conditioner > Active Test
|
Tester Display | Measurement Item |
Control Range | Diagnostic Note | |
Air Mix Servo Targ Pulse(D) |
No. 1 air conditioning radiator damper servo sub-assembly (driver side air mix) pulse |
Min.: 128 Max.: 383 |
Operates between 165 and 257 pulses | |
Air Mix Servo Targ Pulse(P) |
No. 1 air conditioning radiator damper servo sub-assembly (front passenger side air mix) pulse |
Min.: 128 Max.: 383 |
Operates between 255 and 347 pulses | Body Electrical > Air Conditioner > Active Test
|
Tester Display | | Air Mix Servo Targ Pulse(D) | Body Electrical > Air Conditioner > Active Test
|
Tester Display | | Air Mix Servo Targ Pulse(P) |
OK: Each damper servo motor operates.
| NG |
| GO TO DTC TROUBLESHOOTING PROCEDURE FOR MALFUNCTIONING DAMPER SERVO MOTOR |
|
OK | |
| |
| 4. |
CHECK HARNESS AND CONNECTOR (AUTOMATIC LIGHT CONTROL SENSOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)) |
(a) Disconnect the G23 automatic light control sensor connector. (b) Disconnect the G33 main body ECU (multiplex network body ECU) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
G23-1 (CLTB) - G33-23 (CLTB) |
Always | Below 1 Ω | |
G23-2 (CLTE) - G33-25 (CLTE) |
Always | Below 1 Ω | |
G23-4 (CLTS) - G33-24 (CLTS) |
Always | Below 1 Ω | |
G23-1 (CLTB) or G33-23 (CLTB) - Other terminals and body ground |
Always | 10 kΩ or higher | |
G23-2 (CLTE) or G33-25 (CLTE) - Other terminals and body ground |
Always | 10 kΩ or higher | |
G23-4 (CLTS) or G33-24 (CLTS) - Other terminals and body ground |
Always | 10 kΩ or higher |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
OK | |
| |
| 5. |
INSPECT AUTOMATIC LIGHT CONTROL SENSOR |
(a) Remove the automatic light control sensor. Click here
 (b) Inspect the automatic light control sensor.
Click here
| OK |
| INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET |
| NG |
| REPLACE AUTOMATIC LIGHT CONTROL SENSOR |
| 6. |
BLEED AIR FROM COOLING SYSTEM | (a) Bleed air from cooling system.
Click here
|
NEXT | |
| |
| 7. |
CHECK OPERATION (AIR CONDITIONING SYSTEM) |
(a)
Set the same temperature for the left and right sides and check that
the air that blows from the left and right front registers is the same
temperature. OK: The air from the left and right front registers is the same temperature.
| OK |
| END (MALFUNCTION DUE TO AIR IN COOLING SYSTEM) |
|
NG | |
| |
| 8. |
PERFORM ACTIVE TEST USING TECHSTREAM | (a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG). (c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Air Conditioner / Active Test.
(e) Perform the Active Test according to the display on the Techstream. Body Electrical > Air Conditioner > Active Test
|
Tester Display | Measurement Item |
Control Range | Diagnostic Note | |
Air Mix Servo Targ Pulse(D) |
No. 1 air conditioning radiator damper servo sub-assembly (driver side air mix) pulse |
Min.: 128 Max.: 383 |
Operates between 165 and 257 pulses | |
Air Mix Servo Targ Pulse(P) |
No. 1 air conditioning radiator damper servo sub-assembly (front passenger side air mix) pulse |
Min.: 128 Max.: 383 |
Operates between 255 and 347 pulses | Body Electrical > Air Conditioner > Active Test
|
Tester Display | | Air Mix Servo Targ Pulse(D) | Body Electrical > Air Conditioner > Active Test
|
Tester Display | | Air Mix Servo Targ Pulse(P) |
OK: Each damper servo motor operates.
| OK |
| REPLACE HEATER RADIATOR UNIT SUB-ASSEMBLY |
| NG |
| GO TO DTC TROUBLESHOOTING PROCEDURE FOR MALFUNCTIONING DAMPER SERVO MOTOR | | 
