Seat Blower Control Circuit

AIR CONDITIONING: AIR CONDITIONING SYSTEM: Seat Blower Control Circuit

Seat Blower Control Circuit

DESCRIPTION

The seat blower changes airflow volume according to a signal from the A/C amplifier.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSE (S-HTR)

(a) Remove the S-HTR fuse from the instrument panel J/B.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:

NG -- REPLACE FUSE (S-HTR)
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - SEAT CLIMATE CONTROL BLOWER)

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

(b) Disconnect the connector from the seat climate control blower.
(c) 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.

3. CHECK HARNESS AND CONNECTOR (SEAT CUSHION CLIMATE BLOWER - SEAT BACK CLIMATE BLOWER)

(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.

4. CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL BLOWER - BATTERY)

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

Result:

C -- GO TO PUSH BUTTON START SYSTEM
B -- GO TO STARTING SYSTEM
A -- Continue to next step.

5. CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL BLOWER - 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. INSPECT AIR CONDITIONING AMPLIFIER

(a) Remove the A/C amplifier with connectors still connected.
(b) Turn the ignition switch on (IG).

OK:
Waveform appears as shown in the illustration.

HINT: Waveform varies with the blower level.

NG -- REPLACE AIR CONDITIONING AMPLIFIER
OK -- REPLACE SEAT CLIMATE CONTROL BLOWER