B1432

AIR CONDITIONING: AIR CONDITIONING SYSTEM: B1432/32: Air Inlet Damper Position Sensor Circuit

DTC B1432/32 - Air Inlet Damper Position Sensor Circuit

DESCRIPTION

This sensor detects the position of the recirculation damper servo and sends appropriate signals to the A/C amplifier. The position sensor is built into the recirculation damper servo.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM (AIR INLET DAMPER POSITION SENSOR)
(a) Check the Data List for proper functioning of the air inlet damper position sensor.

Air Conditioner

OK:
The display is as specified in the normal condition.

Result

C -- REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY
B -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
A -- Continue to next step.
2. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY (TP1 -SG-3 VOLTAGE)

(a) Remove the A/C amplifier but do not disconnect the connectors.
(b) Turn the ignition switch ON.
(c) Measure the voltage of the connectors.
Standard voltage:

HINT: As the temperature increases, the voltage decreases.

Result

C -- REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY
B -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
A -- Continue to next step.
3. INSPECT RECIRCULATION DAMPER SERVO SUB-ASSEMBLY

(a) Remove the damper servo.
(b) Measure the resistance of the damper servo.
Standard resistance:

HINT:
- B1442 for operation procedures for the recirculation damper servo.
- As the recirculation damper servo moves from recirculation to fresh, the resistance decreases gradually without interruption.

NG -- REPLACE RECIRCULATION DAMPER SERVO SUB-ASSEMBLY
OK -- Continue to next step.
4. CHECK WIRE HARNESS (RECIRCULATION DAMPER SERVO - A/C AMPLIFIER)

(a) Disconnect the A16 servo connector.
(b) Disconnect the A8 and A9 amplifier connectors.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY