Recirculation Damper Servo Motor Circuit

HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: Recirculation Damper Servo Motor Circuit
- Recirculation Damper Servo Motor Circuit

DESCRIPTION

The recirculation damper servo motor and No. 1 heater control (air inlet control switch) are powered through the HTR-IG fuse. Operating No. 1 heater control (air inlet control switch) drives the recirculation damper servo motor to switch between "FRESH" and "RECIRCULATION".

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1. INSPECT RECIRCULATION DAMPER SERVO MOTOR

(a) Remove the recirculation damper servo motor.

(b) Disconnect the connector from the recirculation damper servo motor.





(c) Connect a positive (+) lead from the battery to terminal 5 and a negative (-) lead from the battery to terminal 2, then check that the arm turns to the "FRESH" side smoothly.

OK:

Lever turns to "FRESH" side smoothly.

(d) Connect a positive (+) lead from the battery to terminal 5 and a negative (-) lead from the battery to terminal 1, then check that the arm turns to the "RECIRCULATION" side smoothly.

OK:

Lever turns to "RECIRCULATION" side smoothly.

Text in Illustration





NG -- REPLACE RECIRCULATION DAMPER SERVO MOTOR Removal
OK -- Continue to next step.

2. INSPECT NO. 1 HEATER CONTROL (AIR INLET CONTROL SWITCH)

(a) Remove the No. 1 heater control (air inlet control switch).

(b) Disconnect the connector from the No. 1 heater control (air inlet control switch).





(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





(d) Check that the indicator light comes on.

(1) Turn the heater control base (air inlet control switch) to LOCK.

(2) Connect a positive (+) lead from the battery to terminal 2 and a negative (-) lead from the battery to terminal 4, and check that the indicator light comes on.

OK:

The indicator light comes on.

(e) Check that the illumination comes on.

(1) Connect a positive (+) lead from the battery to terminal 7 and negative (-) lead from the battery to terminal 6, and check that the illumination comes on.

OK:

The illumination comes on.

Text in Illustration





NG -- REPLACE NO. 1 HEATER CONTROL (AIR INLET CONTROL SWITCH) Disassembly
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (RECIRCULATION DAMPER SERVO MOTOR - BATTERY)

(a) Measure the voltage according to the value(s) in the table below.





Standard Voltage:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (NO. 1 HEATER CONTROL (AIR INLET CONTROL SWITCH) - BATTERY)

(a) Measure the voltage according to the value(s) in the table below.





Standard Voltage:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

5. CHECK HARNESS AND CONNECTOR (NO. 1 HEATER CONTROL(AIR INLET CONTROL SWITCH) - BODY GROUND)

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

6. CHECK HARNESS AND CONNECTOR (NO. 1 HEATER CONTROL - RECIRCULATION DAMPER SERVO MOTOR)

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

7. CHECK HARNESS AND CONNECTOR (NO. 1 HEATER CONTROL - A/C AMPLIFIER)

(a) Disconnect the connector from the A/C amplifier.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





*1: for 2AZ-FE

*2: for 2ZR-FE

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures