Page 345 of 4500
Fig. 110: Checking Harness And Connector (Cool Air Bypass Servomotor - Air Conditioning
Amplifier)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: REPLACE AIR CONDITIONING AMPLIFIER (SEE REPLACEMENT
)
CIRCUIT DESCRIPTION
The air inlet servomotor is controlled by the A/C amplifier and moves the air inlet servomotor to the desired
position.
Fig. 111: DTC Detection Item Trouble Area Chart
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
WIRING DIAGRAM
Page 346 of 4500
Fig. 112: Air Inlet Damper Control Servomotor Circuit
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
1.PERFORM ACTUATOR CHECK
a. Remove the glove box to see and check the air inlet servomotor operation.
b. Set the actuator check mode (SEE ACTUATOR CHECK
).
c. Press the DEF switch to set the STEP operation.
d. Press the DEF switch in order and check the operation of the air inlet servomotor.
Page 347 of 4500
Fig. 113: Checking Actuator
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
DISPLAY CODE - RECIRCULATION DAMPER POSITION
OK:
Recirculation damper changes in accordance with each display code.
Display codeRecirculation damper position
0FRESH
1FRESH
2RECIRCULATION / FRESH
3RECIRCULATION
4FRESH
5FRESH
6FRESH
7FRESH
8FRESH
9FRESH
Page 348 of 4500
Result:
ACTUATOR TEST RESULT
B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
C: REPLACE AIR CONDITIONING AMPLIFIER (SEE REPLACEMENT )
A: Go to next step
2.INSPECT AIR INLET SERVOMOTOR
a. Remove the air inlet servomotor.
b. Connect the positive (+) lead from the battery to terminal 5 and negative (-) lead to terminal 4, then
check that the lever turns to the "FRESH" position smoothly.
c. Connect the positive (+) lead from the battery to terminal 4 and negative (-) lead to terminal 5, then
check that the lever turns to the "RECIRCULATION" position smoothly.
NGA
OK (Checking from the PROBLEM SYMPTOMS TABLE)B
OK (Checking from the DTC)C
Page 349 of 4500
Fig. 114: Inspecting Air Inlet Servomotor
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPLACE AIR INLET SERVOMOTOR
OK: Go to next step
3.CHECK HARNESS AND CONNECTOR (AIR INLET SERVOMOTOR - AIR CONDITIONING
AMPLIFIER) (SEE ELECTRONIC CIRCUIT INSPECTION PROCEDURE
)
a. Measure the resistance according to the value (s) in the table below.
Standard:
AIR INLET SERVOMOTOR - AIR CONDITIONING AMPLIFIER RESISTANCE
Tester connectionConditionSpecified condition
A36-17 (AIR) - A41-4 (REC)AlwaysBelow 1 ohms
A36-16 (AIF) - A41-5 (FRS)AlwaysBelow 1 ohms
A36-17 (AIR) - Body groundAlways10 kohms or higher
A36-16 (AIF) - Body groundAlways10 kohms or higher
Page 350 of 4500
Fig. 115: Checking Harness And Connector (Air Inlet Servomotor - Air Conditioning Amplifier)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Page 351 of 4500
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: REPLACE AIR CONDITIONING AMPLIFIER (SEE REPLACEMENT )
CIRCUIT DESCRIPTION
In this circuit, the compressor assembly receives a signal on refrigerant compression required by the air
conditioning amplifier. Based on the signal, the compressor assembly changes the degree of refrigerant
compression.
Fig. 116: DTC Detection Item Trouble Area Chart
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
WIRING DIAGRAM
Fig. 117: Compressor Solenoid Circuit
Page 352 of 4500
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
1.INSPECT AIR CONDITIONING AMPLIFIER (SOL+ - SOL-)
a. Remove the A/C amplifier with connectors still connected.
b. Turn the ignition switch to the ON position.
c. Measure the voltage according to the value (s) in the table below.
Standard:
AIR CONDITIONING AMPLIFIER (SOL+ - SOL-) VOLTAGE
HINT:
As the temperature increases, the voltage decreases.
Result:
AIR CONDITIONING AMPLIFIER (SOL+ - SOL-) TEST RESULT
Tester connectionConditionSpecified condition
A11-6 (SOL+) - A11-7 (SOL-)Start the engine Auto switch: ONBelow 1.0 V
ANG
BOK (Checking from the PROBLEM SYMPTOMS TABLE)
COK (Checking from the DTC)