Rear Magnetic Valve Circuit

HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: Rear Magnetic Valve Circuit
- Rear Magnetic Valve Circuit

DESCRIPTION

The rear cooling unit expansion valve is controlled by the air conditioning amplifier assembly.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM (REAR COOLING UNIT EXPANSION VALVE)

(a) Select the Active Test, use the Techstream to generate a control command, and then check that the rear cooling unit expansion valve operates.

OK:

Rear magnetic valve operates normally.

Air Conditioner





NG -- INSPECT FUSE (A/C IG)

OK -- REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Removal

2. INSPECT FUSE (A/C IG)

(a) Remove the A/C IG fuse from the cowl side junction block LH.

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

Standard Resistance:





NG -- REPLACE FUSE
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING WIRING HARNESS - BATTERY)

(a) Disconnect the air conditioning wiring harness sub-assembly connector.





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

Standard Voltage:





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

4. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING WIRING HARNESS - AIR CONDITIONING AMPLIFIER)





(a) Disconnect the air conditioning wiring harness sub-assembly connector.

(b) Disconnect the E36 amplifier 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 REAR COOLING UNIT EXPANSION VALVE (OPERATION)

(a) Replace the rear cooling unit expansion valve Disassembly.

HINT
Since the rear cooling unit expansion valve cannot be inspected while it is removed from the vehicle, replace the rear cooling unit expansion valve with a normal one and check that the condition returns to normal.

OK:

Same problem does not occur.

NG -- CHECK AIR CONDITIONING WIRING HARNESS SUB-ASSEMBLY (OPERATION)

OK -- REPLACE REAR COOLING UNIT EXPANSION VALVE Disassembly

6. CHECK AIR CONDITIONING WIRING HARNESS SUB-ASSEMBLY (OPERATION)

(a) Replace the air conditioning wiring harness sub-assembly with a normal one and check that the condition returns to normal.

OK:

Same problem does not occur.

NG -- REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Removal

OK -- REPLACE AIR CONDITIONING WIRING HARNESS SUB-ASSEMBLY