Blower Motor Circuit (from 07/2011)

HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Hatchback): Blower Motor Circuit
- Blower Motor Circuit

DESCRIPTION

When the No. 2 heater control sub-assembly (blower switch) is set to position 1 or higher, the contact of the heater blower motor relay assembly (HTR relay) relay is closed, current flows to the blower motor, and the blower motor operates. The blower motor speed can be changed by exchanging the ground and the blower resistor circuit with the No. 2 heater control sub-assembly (blower switch).

WIRING DIAGRAM

INSPECTION PROCEDURE

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

PROCEDURE

1. INSPECT HEATER BLOWER MOTOR RELAY ASSEMBLY (HTR RELAY)

(a) Inspect the heater blower motor relay assembly (HTR relay) Testing and Inspection.

NG -- REPLACE HEATER BLOWER MOTOR RELAY ASSEMBLY (HTR RELAY)
OK -- Continue to next step.

2. INSPECT BLOWER MOTOR WITH FAN SUB-ASSEMBLY

(a) Inspect the blower motor with fan sub-assembly Testing and Inspection.

NG -- REPLACE BLOWER MOTOR WITH FAN SUB-ASSEMBLY Removal (from 07/2011)
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (HEATER BLOWER MOTOR RELAY ASSEMBLY (HTR RELAY) - BATTERY, IG1 NO. 1 RELAY AND BODY GROUND)

(a) Remove the heater blower motor relay assembly (HTR relay).

(b) 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 (HEATER BLOWER MOTOR RELAY ASSEMBLY (HTR RELAY) - AIR CONDITIONING AMPLIFIER ASSEMBLY)

(a) Remove the heater blower motor relay assembly (HTR relay).

(b) Disconnect the D130 air conditioning amplifier assembly connector.

(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.

5. CHECK HARNESS AND CONNECTOR (NO. 2 HEATER CONTROL SUB-ASSEMBLY - AIR CONDITIONING AMPLIFIER ASSEMBLY)

(a) Disconnect the D129 No. 2 heater control sub-assembly (blower switch) connector.

(b) Disconnect the D130 air conditioning amplifier assembly connector.

(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.

6. CHECK HARNESS AND CONNECTOR (BLOWER MOTOR WITH FAN SUB-ASSEMBLY - HEATER BLOWER MOTOR RELAY ASSEMBLY (HTR RELAY))

(a) Disconnect the D125 blower motor with fan sub-assembly connector.

(b) 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.

7. CHECK HARNESS AND CONNECTOR (BLOWER MOTOR WITH FAN SUB-ASSEMBLY - BLOWER RESISTOR)

(a) Disconnect the D125 blower motor with fan sub-assembly connector.

(b) Disconnect the D124 blower resistor connector.

(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.

8. INSPECT BLOWER RESISTOR

(a) Inspect the blower resistor Testing and Inspection.

NG -- REPLACE BLOWER RESISTOR Removal (from 07/2011)
OK -- Continue to next step.

9. INSPECT NO. 2 HEATER CONTROL SUB-ASSEMBLY (BLOWER SWITCH)

(a) Inspect the No. 2 heater control sub-assembly (blower switch) Testing and Inspection.

NG -- REPLACE NO. 2 HEATER CONTROL SUB-ASSEMBLY (BLOWER SWITCH) Removal (from 07/2011)
OK -- Continue to next step.

10. CHECK HARNESS AND CONNECTOR (NO. 2 HEATER CONTROL SUB-ASSEMBLY - BLOWER RESISTOR AND BODY GROUND)

(a) Disconnect the D129 No. 2 heater control sub-assembly (blower switch) connector.

(b) Disconnect the D124 blower resistor connector.

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

Standard Resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

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