Recirculation Damper Servo Motor Circuit

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

DESCRIPTION

The air inlet control servo motor and No. 1 heater control (air inlet control switch, MODE switch) are powered through the HTR-IG fuse. Operating the No. 1 heater control (air inlet control switch) drives the air inlet control 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 procedures.

PROCEDURE

1. INSPECT DAMPER SERVO SUB-ASSEMBLY (AIR INLET CONTROL SERVO MOTOR)

(a) Inspect the damper servo sub-assembly (air inlet control servo motor) Testing and Inspection.

NG -- REPLACE DAMPER SERVO SUB-ASSEMBLY (AIR INLET CONTROL SERVO MOTOR) Removal
OK -- Continue to next step.

2. INSPECT NO. 1 HEATER CONTROL SUB-ASSEMBLY

(a) Inspect the No. 1 heater control sub-assembly Testing and Inspection.

NG -- REPLACE NO. 1 HEATER CONTROL SUB-ASSEMBLY Disassembly
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (DAMPER SERVO SUB-ASSEMBLY (AIR INLET CONTROL SERVO MOTOR) - IG1 NO. 1 RELAY)

(a) Disconnect the D84 damper servo sub-assembly (air inlet control servo motor) connector.





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

Standard Voltage:





Text in Illustration





(c) Reconnect the damper servo sub-assembly (air inlet control servo motor) connector.

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

4. CHECK HARNESS AND CONNECTOR (NO. 1 HEATER CONTROL SUB-ASSEMBLY - IG1 NO. 1 RELAY)

(a) Disconnect the D7 No. 1 heater control sub-assembly connector.





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

Standard Voltage:





Text in Illustration





(c) Reconnect the No. 1 heater control sub-assembly connector.

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

5. CHECK HARNESS AND CONNECTOR (NO. 1 HEATER CONTROL SUB-ASSEMBLY - BODY GROUND)

(a) Disconnect the D7 No. 1 heater control sub-assembly connector.





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

Standard Resistance:





Text in Illustration





(c) Reconnect the No. 1 heater control sub-assembly connector.

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

6. CHECK HARNESS AND CONNECTOR (NO. 1 HEATER CONTROL SUB-ASSEMBLY - DAMPER SERVO SUB-ASSEMBLY (AIR INLET CONTROL SERVO MOTOR)
)

(a) Disconnect the D7 No. 1 heater control sub-assembly connector.

(b) Disconnect the D84 damper servo sub-assembly (air inlet control servo motor) connector.

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

Standard Resistance:





(d) Reconnect the damper servo sub-assembly (air inlet control servo motor) connector.

(e) Reconnect the No. 1 heater control sub-assembly connector.

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

7. CHECK HARNESS AND CONNECTOR (NO. 1 HEATER CONTROL SUB-ASSEMBLY - AIR CONDITIONING AMPLIFIER ASSEMBLY)

(a) Disconnect the D7 No. 1 heater control sub-assembly connector.

(b) Disconnect the D16 air conditioning amplifier assembly connector.

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

Standard Resistance:





(d) Reconnect the air conditioning amplifier assembly connector.

(e) Reconnect the No. 1 heater control sub-assembly connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

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