DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK VEHICLE TYPE
CHECK CAN COMMUNICATION SYSTEM
CHECK OPERATION
INSPECT TEMPERATURE CONTROL SWITCH ASSEMBLY LH
CHECK HARNESS AND CONNECTOR (TEMPERATURE CONTROL SWITCH ASSEMBLY LH - MULTI-DISPLAY ASSEMBLY)
INSPECT TEMPERATURE CONTROL SWITCH ASSEMBLY RH
CHECK HARNESS AND CONNECTOR (TEMPERATURE CONTROL SWITCH ASSEMBLY RH - MULTI-DISPLAY ASSEMBLY)
CHECK MULTI-DISPLAY ASSEMBLY
CHECK LIN COMMUNICATION SYSTEM
CHECK OPERATION
INSPECT TEMPERATURE CONTROL SWITCH ASSEMBLY LH
CHECK HARNESS AND CONNECTOR (TEMPERATURE CONTROL SWITCH ASSEMBLY LH - AIR CONDITIONING CONTROL ASSEMBLY)
INSPECT TEMPERATURE CONTROL SWITCH ASSEMBLY RH
CHECK HARNESS AND CONNECTOR (TEMPERATURE CONTROL SWITCH ASSEMBLY RH - AIR CONDITIONING CONTROL ASSEMBLY)
CHECK AIR CONDITIONING CONTROL ASSEMBLY
AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System) - 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 assembly*1 or the air conditioning control assembly*2.
*1: w/ Navigation System
*2: w/o Navigation System
WIRING DIAGRAM
INSPECTION PROCEDURE
Check if the vehicle is equipped with the navigation system.
Result| Result | Proceed to |
| w/ Navigation System | A |
| w/o Navigation System | B |
| 2.CHECK CAN COMMUNICATION SYSTEM |
Check the CAN communication system.
- OK:
- CAN communication system has no problem.
Result| Result | Proceed to |
| OK | A |
| NG (for LHD) | B |
| NG (for RHD) | C |
| | GO TO CAN COMMUNICATION SYSTEM ()
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| | GO TO CAN COMMUNICATION SYSTEM ()
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Check that the temperature control switches operate.
Result| Result | Proceed to |
| Temperature control switch LH does not operate | A |
| Temperature control switch RH does not operate | B |
| Temperature control switch LH and RH do not operate | C |
| 4.INSPECT TEMPERATURE CONTROL SWITCH ASSEMBLY LH |
Remove the temperature control switch assembly LH ().
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Switch Condition | Specified Condition |
| 3 (UP) - 4 (SE) | UP switch pressed | Below 1 Ω |
| UP switch not pressed | 10 kΩ or higher |
| 5 (DOWN) - 4 (SE) | DOWN switch pressed | Below 1 Ω |
| DOWN switch not pressed | 10 kΩ or higher |
Text in Illustration| *1 | Component without harness connected
(Temperature Control Switch Assembly LH) |
| | REPLACE TEMPERATURE CONTROL SWITCH ASSEMBLY LH ()
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| 5.CHECK HARNESS AND CONNECTOR (TEMPERATURE CONTROL SWITCH ASSEMBLY LH - MULTI-DISPLAY ASSEMBLY) |
Disconnect the F16 temperature control switch assembly LH connector.
Disconnect the F90 multi-display assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| F16-3 (UP) - F90-2 (TEC+) | Always | Below 1 Ω |
| F16-5 (DOWN) - F90-7 (TEC-) | Always | Below 1 Ω |
| F16-4 (SE) - F90-6 (AGND) | Always | Below 1 Ω |
| F16-3 (UP) - Body ground | Always | 10 kΩ or higher |
| F16-5 (DOWN) - Body ground | Always | 10 kΩ or higher |
| F16-4 (SE) - Body ground | Always | 10 kΩ or higher |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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| OK | |
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| REPLACE MULTI-DISPLAY ASSEMBLY ()
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| 6.INSPECT TEMPERATURE CONTROL SWITCH ASSEMBLY RH |
Remove the temperature control switch assembly RH ().
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Switch Condition | Specified Condition |
| 5 (UP) - 4 (SE) | UP switch pressed | Below 1 Ω |
| UP switch not pressed | 10 kΩ or higher |
| 3 (DOWN) - 4 (SE) | DOWN switch pressed | Below 1 Ω |
| DOWN switch not pressed | 10 kΩ or higher |
Text in Illustration| *1 | Component without harness connected
(Temperature Control Switch Assembly RH) |
| | REPLACE TEMPERATURE CONTROL SWITCH ASSEMBLY RH ()
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| 7.CHECK HARNESS AND CONNECTOR (TEMPERATURE CONTROL SWITCH ASSEMBLY RH - MULTI-DISPLAY ASSEMBLY) |
Disconnect the F17 temperature control switch assembly RH connector.
Disconnect the F90 multi-display assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| F17-5 (UP) - F90-3 (TES+) | Always | Below 1 Ω |
| F17-3 (DOWN) - F90-8 (TES-) | Always | Below 1 Ω |
| F17-4 (SE) - F90-9 (BGND) | Always | Below 1 Ω |
| F17-5 (UP) - Body ground | Always | 10 kΩ or higher |
| F17-3 (DOWN) - Body ground | Always | 10 kΩ or higher |
| F17-4 (SE) - Body ground | Always | 10 kΩ or higher |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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| OK | |
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| REPLACE MULTI-DISPLAY ASSEMBLY ()
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| 8.CHECK MULTI-DISPLAY ASSEMBLY |
Replace the multi-display assembly with a new or normally functioning one ().
Check that the temperature control with temperature control switch LH and RH.
- OK:
- Temperature control with temperature control switch LH and RH.
| | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE ()
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| OK | |
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| END (MULTI-DISPLAY ASSEMBLY IS DEFECTIVE) |
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| 9.CHECK LIN COMMUNICATION SYSTEM |
Check the LIN communication system.
- OK:
- LIN communication system has no problem.
| | GO TO LIN COMMUNICATION SYSTEM ()
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Check that the temperature control switches operate.
Result| Result | Proceed to |
| Temperature control switch LH does not operate | A |
| Temperature control switch RH does not operate | B |
| Temperature control switch LH and RH do not operate | C |
| 11.INSPECT TEMPERATURE CONTROL SWITCH ASSEMBLY LH |
Remove the temperature control switch assembly LH ().
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Switch Condition | Specified Condition |
| 3 (UP) - 4 (SE) | UP switch pressed | Below 1 Ω |
| UP switch not pressed | 10 kΩ or higher |
| 5 (DOWN) - 4 (SE) | DOWN switch pressed | Below 1 Ω |
| DOWN switch not pressed | 10 kΩ or higher |
Text in Illustration| *1 | Component without harness connected
(Temperature Control Switch Assembly LH) |
| | REPLACE TEMPERATURE CONTROL SWITCH ASSEMBLY LH ()
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| 12.CHECK HARNESS AND CONNECTOR (TEMPERATURE CONTROL SWITCH ASSEMBLY LH - AIR CONDITIONING CONTROL ASSEMBLY) |
Disconnect the F16 temperature control switch assembly LH connector.
Disconnect the F10 air conditioning control assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| F16-3 (UP) - F10-12 (DTP+) | Always | Below 1 Ω |
| F16-5 (DOWN) - F10-11 (DTP-) | Always | Below 1 Ω |
| F16-4 (SE) - F10-9 (S5) | Always | Below 1 Ω |
| F16-3 (UP) - Body ground | Always | 10 kΩ or higher |
| F16-5 (DOWN) - Body ground | Always | 10 kΩ or higher |
| F16-4 (SE) - Body ground | Always | 10 kΩ or higher |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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| OK | |
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| REPLACE AIR CONDITIONING CONTROL ASSEMBLY ()
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| 13.INSPECT TEMPERATURE CONTROL SWITCH ASSEMBLY RH |
Remove the temperature control switch assembly RH ().
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Switch Condition | Specified Condition |
| 5 (UP) - 4 (SE) | UP switch pressed | Below 1 Ω |
| UP switch not pressed | 10 kΩ or higher |
| 3 (DOWN) - 4 (SE) | DOWN switch pressed | Below 1 Ω |
| DOWN switch not pressed | 10 kΩ or higher |
Text in Illustration| *1 | Component without harness connected
(Temperature Control Switch Assembly RH) |
| | REPLACE TEMPERATURE CONTROL SWITCH ASSEMBLY RH ()
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| 14.CHECK HARNESS AND CONNECTOR (TEMPERATURE CONTROL SWITCH ASSEMBLY RH - AIR CONDITIONING CONTROL ASSEMBLY) |
Disconnect the F17 temperature control switch assembly RH connector.
Disconnect the F10 air conditioning control assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| F17-5 (UP) - F10-10 (PTP+) | Always | Below 1 Ω |
| F17-3 (DOWN) - F10-3 (PTP-) | Always | Below 1 Ω |
| F17-4 (SE) - F10-2 (SG) | Always | Below 1 Ω |
| F17-5 (UP) - Body ground | Always | 10 kΩ or higher |
| F17-3 (DOWN) - Body ground | Always | 10 kΩ or higher |
| F17-4 (SE) - Body ground | Always | 10 kΩ or higher |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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| OK | |
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| REPLACE AIR CONDITIONING CONTROL ASSEMBLY ()
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| 15.CHECK AIR CONDITIONING CONTROL ASSEMBLY |
Replace the air conditioning control assembly with a new or normally functioning one ().
Check that the temperature control with temperature control switch LH and RH.
- OK:
- Temperature control with temperature control switch LH and RH.
| | REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY ()
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| OK | |
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| END (AIR CONDITIONING CONTROL ASSEMBLY IS DEFECTIVE) |
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