Heater Control Switch Circuit (from 07/2011)
HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Hatchback): Heater Control Switch Circuit
- Heater Control Switch Circuit
DESCRIPTION
The No. 3 heater control sub-assembly (A/C switch*1, A/C LED*1, MAX HOT switch*2) is powered through the A/C fuse. The No. 3 heater control sub-assembly (A/C switch*1, A/C LED*1, MAX HOT switch*2) transmits operational signals of each switch to the air conditioning amplifier assembly.
* *1: w/ Cooler
* *2: w/ PTC Heater
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedures.
PROCEDURE
1. INSPECT NO. 3 HEATER CONTROL SUB-ASSEMBLY (A/C SWITCH, A/C LED, MAX HOT SWITCH)
(a) Inspect the No. 3 heater control sub-assembly (A/C switch*1, A/C LED*1, MAX HOT switch*2) Testing and Inspection.
*1: w/ Cooler
*2: w/ PTC Heater
NG -- REPLACE NO. 3 HEATER CONTROL SUB-ASSEMBLY (A/C SWITCH, A/C LED, MAX HOT SWITCH) Removal (from 07/2011)
OK -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (NO. 3 HEATER CONTROL SUB-ASSEMBLY - IG1 NO. 1 RELAY)
(a) Disconnect the D127 No. 3 heater control sub-assembly (A/C switch*1, A/C LED*1, MAX HOT switch*2) connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
*1: w/ Cooler
*2: w/ PTC Heater
Text in Illustration
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (NO. 3 HEATER CONTROL SUB-ASSEMBLY - AIR CONDITIONING AMPLIFIER ASSEMBLY)
(a) Disconnect the D127 No. 3 heater control sub-assembly (A/C switch*1, A/C LED*1, MAX HOT switch*2) 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:
*1: w/ Cooler
*2: w/ PTC Heater
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures