Cooling Box Control Switch Circuit

HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: Cooling Box Control Switch Circuit
- Cooling Box Control Switch Circuit

DESCRIPTION

The cooler control switch sub-assembly is the activation switch for the cool box. If the cool box does not activate when the cooler control switch is pushed, there may be a malfunction in the circuit shown below.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSE (PANEL, A/C IG, ECU-B1)

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

(b) Remove the ECU-B1 fuse from the engine room relay block.

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

Standard Resistance:





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

2. CHECK HARNESS AND CONNECTOR (NO. 1 COOLER WIRING HARNESS - BATTERY)

(a) Disconnect the No. 1 cooler 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.

3. CHECK HARNESS AND CONNECTOR (NO. 1 COOLER WIRING HARNESS - BODY GROUND)

(a) Disconnect the No. 1 cooler wiring harness sub-assembly connector.





(b) 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 NO. 1 COOLER WIRING HARNESS SUB-ASSEMBLY (OPERATION)

(a) Replace the No. 1 cooler wiring harness sub-assembly with a normal one and check that the condition returns to normal.

OK:

Same problem does not occur.

NG -- INSPECT COOLER CONTROL SWITCH SUB-ASSEMBLY

OK -- REPLACE NO. 1 COOLER WIRING HARNESS SUB-ASSEMBLY

5. INSPECT COOLER CONTROL SWITCH SUB-ASSEMBLY

(a) Remove the cooler control switch sub-assembly Disassembly.





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

Standard Resistance:





(c) Apply battery voltage to the cooler control switch connector and check that the cooler control switch illuminates.

OK:





NG -- REPLACE COOLER CONTROL SWITCH SUB-ASSEMBLY Disassembly

OK -- REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (for Cool Box) Disassembly