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:
Diagnosis System
DIAGNOSIS SYSTEM
1. DESCRIPTION
(a) Smart key system (for start function) data and the Diagnostic Trouble Codes
(DTCs) can be read through the Data Link Connector 3 (DLC3) of the vehicle. When
the function seems to be malfunctioning, use the Techstream t ...
Transponder Chip Malfunction (B2793-B2795)
DESCRIPTION
DTC B2793 is stored when a malfunction is found in the key during key
code registration or a key code is not registered normally. Replace the
key if key code registration cannot be performed normally and this DTC is
output.
...
0.0074