Heater Control Switch Circuit
HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: Heater Control Switch Circuit
Heater Control Switch Circuit
DESCRIPTION
The temperature control switch assembly LH and RH sends the temperature up and down signal to the air conditioning amplifier assembly through the multi-display*1 or the air conditioning control assembly*2.
HINT:
*1: w/ Multi-display
*2: w/o Multi-display
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
1. CHECK VEHICLE TYPE
(a) Check if the vehicle is equipped with the multi-display.
Result
B -- CHECK LIN COMMUNICATION SYSTEM
A -- Continue to next step.
2. CHECK CAN COMMUNICATION SYSTEM
(a) Check the CAN communication system.
OK:
CAN communication system has no problem.
NG -- GO TO CAN COMMUNICATION SYSTEM
OK -- Continue to next step.
3. CHECK OPERATION
(a) Check that the temperature control switches operate.
Result
B -- INSPECT TEMPERATURE CONTROL SWITCH ASSEMBLY RH
A -- Continue to next step.
4. INSPECT TEMPERATURE CONTROL SWITCH ASSEMBLY LH
(a) Remove the temperature control switch assembly LH Components.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPLACE TEMPERATURE CONTROL SWITCH ASSEMBLY LH
OK -- Continue to next step.
5. CHECK HARNESS AND CONNECTOR (TEMPERATURE CONTROL SWITCH LH - MULTI-DISPLAY)
(a) Disconnect the F16 switch connector.
(b) Disconnect the F31 display connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE MULTI-DISPLAY
6. INSPECT TEMPERATURE CONTROL SWITCH ASSEMBLY RH
(a) Remove the temperature control switch RH Components.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPLACE TEMPERATURE CONTROL SWITCH ASSEMBLY RH
OK -- Continue to next step.
7. CHECK HARNESS AND CONNECTOR (TEMPERATURE CONTROL SWITCH RH - MULTI-DISPLAY)
(a) Disconnect the F17 switch connector.
(b) Disconnect the F31 display connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE MULTI-DISPLAY
8. CHECK LIN COMMUNICATION SYSTEM
(a) Check the LIN communication system.
OK:
LIN communication system has no problem.
NG -- GO TO LIN COMMUNICATION SYSTEM
OK -- Continue to next step.
9. CHECK OPERATION
(a) Check that the temperature control switches operate.
Result
B -- INSPECT TEMPERATURE CONTROL SWITCH ASSEMBLY RH
A -- Continue to next step.
10. INSPECT TEMPERATURE CONTROL SWITCH ASSEMBLY LH
(a) Remove the temperature control switch assembly LH Components.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPLACE TEMPERATURE CONTROL SWITCH ASSEMBLY LH
OK -- Continue to next step.
11. CHECK HARNESS AND CONNECTOR (TEMPERATURE CONTROL SWITCH LH - AIR CONDITIONING CONTROL)
(a) Disconnect the F16 switch connector.
(b) Disconnect the F10 control connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE AIR CONDITIONING CONTROL ASSEMBLY
12. INSPECT TEMPERATURE CONTROL SWITCH ASSEMBLY RH
(a) Remove the temperature control switch assembly RH Components.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPLACE TEMPERATURE CONTROL SWITCH ASSEMBLY RH
OK -- Continue to next step.
13. CHECK HARNESS AND CONNECTOR (TEMPERATURE CONTROL SWITCH RH - AIR CONDITIONING CONTROL)
(a) Disconnect the F17 switch connector.
(b) Disconnect the F10 control connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE AIR CONDITIONING CONTROL ASSEMBLY