Toyota Corolla Cross: Cooling is Poor
DESCRIPTION
If the cooling effect of the air conditioning system is weak, the following factors may be the cause.
|
Symptom | Factor |
|---|---|
|
|
PROCEDURE
| 1. |
CHECK FOR DTC |
(a) Check for DTCs.
Body Electrical > Main Body > Trouble Codes|
Result | Proceed to |
|---|---|
|
B1244 is not output | A |
|
B1244 is output | B |
| B |
.gif) | GO TO DTC B124400 w/ AFS: Click here w/o AFS: Click here
|
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|
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| 2. |
CHECK ECO MODE SETTING |
(a) Check if the ECO mode indicator is off.
OK:
The ECO mode indicator is off.
| NG | | GO TO STEP 4 |
|
| 3. |
CHECK ECO MODE CONTROL OPERATION |
(a) Operate the ECO switch assembly (air conditioning control assembly) and check that the ECO mode indicator turns off and the blower speed reduction is canceled.
HINT:
- When ECO mode control is operating, the air conditioning amplifier assembly controls the air conditioning system to enhance fuel efficiency. Therefore, explain to the customer that, when ECO mode control is operating, the blower speed will be reduced.
Control
Outline
Blower Control
When the air conditioning system is in AUTO mode, the blower speed will be reduced to a certain speed. Additionally, if warm-up control is operating, the blower speed will be further reduced.
Air Inlet Control
If the ambient temperature is a certain value or more, the air inlet mode will be changed to recirculation mode.
- In some situations, ECO mode control may not operate even though it is enabled.
|
Result | Proceed to |
|---|---|
|
ECO mode indicator turns off and blower speed reduction is canceled |
A |
| ECO mode indicator turns off, but the blower speed reduction is not canceled |
B |
| ECO mode indicator does not turn off |
C |
| B |
| REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY |
| C |
| REPLACE AIR CONDITIONING CONTROL ASSEMBLY |
|
| 4. |
PERFORM REFRIGERANT SHORTAGE CHECK |
(a) Perform the Utility according to the display on the GTS.
Body Electrical > Air Conditioner > Utility|
Tester Display |
|---|
| Refrigerant Gas Volume Check |
(b) Check that the following conditions are met and perform the refrigerant shortage check according to the display on the GTS.
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 GTS.
|
Result | Proceed to |
|---|---|
|
OK (for Dual Type) | A |
|
OK (for Single Type) |
B |
| NG |
C |
| B |
| GO TO STEP 6 |
| C |
| REPAIR REFRIGERANT LEAK |
|
| 5. |
PERFORM ACTIVE TEST USING GTS |
(a) Perform the Active Test according to the display on the GTS.
Body Electrical > Air Conditioner > Active Test|
Tester Display | Measurement Item |
Control Range | Diagnostic Note |
|---|---|---|---|
|
Front Left Air Mix Damper Control Servo Motor |
No. 1 air conditioning radiator damper servo sub-assembly pulse |
Min.: 128 Max.: 384 |
Operate with ignition switch ON. |
|
Front Right Air Mix Damper Control Servo Motor |
No. 1 air conditioning radiator damper servo sub-assembly pulse |
Min.: 128 Max.: 384 |
Operate with ignition switch ON. |
|
Active Test Display |
|---|
|
Front Left Air Mix Damper Control Servo Motor |
|
Data List Display |
|---|
|
Front Left Air Mix Damper Control Servo Motor Actual Pulse |
|
Active Test Display |
|---|
|
Front Right Air Mix Damper Control Servo Motor |
|
Data List Display |
|---|
|
Front Right Air Mix Damper Control Servo Motor Actual Pulse |
OK:
The No. 1 air conditioning radiator damper servo motor operates.
| OK | | INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET |
| NG | | GO TO DTC TROUBLESHOOTING PROCEDURE FOR MALFUNCTIONING DAMPER SERVO MOTOR |
| 6. |
PERFORM ACTIVE TEST USING GTS |
(a) Perform the Active Test according to the display on the GTS.
Body Electrical > Air Conditioner > Active Test|
Tester Display | Measurement Item |
Control Range | Diagnostic Note |
|---|---|---|---|
|
Front Air Mix Damper Control Servo Motor |
No. 1 air conditioning radiator damper servo sub-assembly pulse |
Min.: 128 Max.: 384 |
Operate with ignition switch ON. |
|
Active Test Display |
|---|
|
Front Air Mix Damper Control Servo Motor |
|
Data List Display |
|---|
|
Front Air Mix Damper Control Servo Motor Actual Pulse |
OK:
The No. 1 air conditioning radiator damper servo motor operates.
| OK | | INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET |
| NG | | GO TO DTC TROUBLESHOOTING PROCEDURE FOR MALFUNCTIONING DAMPER SERVO MOTOR |
READ NEXT:
Operation not Accepted Even If Air Conditioning Switch is Operated
DESCRIPTION If the air conditioning system cannot be operated using the air conditioning control assembly, the following factors may be the cause.
Symptom Factor
Air conditioning syste
Front Window Fogging
DESCRIPTION If the windshield frequently fogs up even though the air conditioning system is operating, the following factors may be the cause.
Symptom Factor
Windshield frequently fogs
Blower Motor does not Operate
DESCRIPTION If air does not flow from the front registers after the blower switch on the air conditioning control assembly is operated, the following factors may be the cause.
Symptom Factor
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DESCRIPTION
Using the current from the TCM, the shift solenoid valve SLU controls the lock-up
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How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
Use the following procedure to troubleshoot the telematics system.
*: Use the GTS.
PROCEDURE
1.
VEHICLE BROUGHT TO WORKSHOP
NEXT
2.
C
