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HOMESERVICE MANUALSTOYOTA2011LANDCRUISER V8-5.7L (3UR-FE)REPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGTESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICSHEATER CONTROL SWITCH CIRCUIT
2011 Toyota Landcruiser V8-5.7L (3UR-FE)
Heater Control Switch Circuit
2011 Toyota Landcruiser V8-5.7L (3UR-FE)SECTION 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 display and navigation module display*1 or the air conditioning control assembly*2.
* *1: w/ Navigation System
* *2: w/o Navigation System
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
1. CHECK VEHICLE TYPE
(a) Check if the vehicle is equipped with the navigation system.
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 Service Precautions
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:
Text in Illustration
NG -- REPLACE TEMPERATURE CONTROL SWITCH ASSEMBLY LH Components
OK -- Continue to next step.
5. CHECK HARNESS AND CONNECTOR (TEMPERATURE CONTROL SWITCH ASSEMBLY LH - DISPLAY AND NAVIGATION MODULE DISPLAY)
(a) Disconnect the F16 temperature control switch assembly LH connector.
(b) Disconnect the F46 display and navigation module 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 DISPLAY AND NAVIGATION MODULE DISPLAY Removal
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:
Text in Illustration
NG -- REPLACE TEMPERATURE CONTROL SWITCH ASSEMBLY RH Components
OK -- Continue to next step.
7. CHECK HARNESS AND CONNECTOR (TEMPERATURE CONTROL SWITCH ASSEMBLY RH - DISPLAY AND NAVIGATION MODULE DISPLAY)
(a) Disconnect the F17 temperature control switch assembly RH connector.
(b) Disconnect the F46 display and navigation module 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 DISPLAY AND NAVIGATION MODULE DISPLAY Removal
8. CHECK LIN COMMUNICATION SYSTEM
(a) Check the LIN communication system.
OK:
LIN communication system has no problem.
NG -- GO TO LIN COMMUNICATION SYSTEM Initial Inspection and Diagnostic Overview
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:
Text in Illustration
NG -- REPLACE TEMPERATURE CONTROL SWITCH ASSEMBLY LH Components
OK -- Continue to next step.
11. CHECK HARNESS AND CONNECTOR (TEMPERATURE CONTROL SWITCH ASSEMBLY LH - AIR CONDITIONING CONTROL ASSEMBLY)
(a) Disconnect the F16 temperature control switch assembly LH connector.
(b) Disconnect the F10 air conditioning control 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 -- REPLACE AIR CONDITIONING CONTROL ASSEMBLY Removal
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:
Text in Illustration
NG -- REPLACE TEMPERATURE CONTROL SWITCH ASSEMBLY RH Components
OK -- Continue to next step.
13. CHECK HARNESS AND CONNECTOR (TEMPERATURE CONTROL SWITCH ASSEMBLY RH - AIR CONDITIONING CONTROL ASSEMBLY)
(a) Disconnect the F17 temperature control switch assembly RH connector.
(b) Disconnect the F10 air conditioning control 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 -- REPLACE AIR CONDITIONING CONTROL ASSEMBLY Removal
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.