Toyota 4Runner: Air Conditioning Control Panel does not Operate
DESCRIPTION
When a switch of the air conditioning control assembly is operated, the air conditioning control assembly uses LIN communication to communicate with the air conditioning amplifier. If a switch of the air conditioning control assembly does not operate properly, a problem with the LIN communication between the air conditioning control assembly and air conditioning amplifier may be causing the malfunction.
WIRING DIAGRAM
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - AIR CONDITIONING CONTROL) |
(a) Disconnect the F42 air conditioning amplifier assembly connector.
(b) Disconnect the F29 air conditioning control assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
F42-37 (LIN1) - F29-10 (LIN1) |
Always |
Below 1 Ω |
|
F42-37 (LIN1) or F29-10 (LIN1) - Body ground |
Always |
10 kΩ or higher |
|
Result |
Proceed to |
|---|---|
|
OK (for Automatic Air Conditioning System) |
A |
|
OK (for Manual Air Conditioning System) |
B |
|
NG |
C |
| A | .gif) |
Go to AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System) |
| B | |
Go to AIR CONDITIONING SYSTEM |
| C | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Sliding Roof ECU Communication Stop (B1273)
DESCRIPTION
This DTC is stored when LIN communication between the sliding roof ECU (sliding
roof drive gear sub-assembly) and main body ECU (multiplex network body ECU) stops
for 10 seconds or mo ...
Other materials about Toyota 4Runner:
Steering Angle Sensor Unusual Bank Angle Detected (C1440)
DESCRIPTION
If the skid control ECU determines that the vehicle is being driven at a steep
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disabled.
It is not a malfunction if the system and sensor circuits are normal ...
Winter driving tips
Carry out the necessary preparations and inspections before driving the
vehicle in winter. Always drive the vehicle in a manner appropriate to the
prevailing weather conditions.
Pre-winter preparations
• Use fluids that are appropriate to the prevaili ...
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