Toyota Venza: Air Conditioning Control Panel Circuit
DESCRIPTION
This circuit consists of the air conditioning control assembly and the A/C amplifier. When the air conditioning control assembly is operated, signals are transmitted to the A/C amplifier through the LIN communication system.
If the LIN communication system malfunctions, the A/C amplifier does not operate even if the air conditioning control assembly is operated.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL ASSEMBLY - BODY GROUND) |
(a) Disconnect the air conditioning control assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
E3-5 (GND) - Body ground |
Always |
Below 1 Ω |
|
*1 |
Front view of wire harness connector (to Air Conditioning Control Assembly) |
| NG | .gif) |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
.gif)
|
2. |
CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL ASSEMBLY - BATTERY) |
|
(a) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
3. |
CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER - AIR CONDITIONING CONTROL ASSEMBLY) |
|
(a) Disconnect the A/C amplifier connector. |
|
|
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
4. |
INSPECT AIR CONDITIONING CONTROL ASSEMBLY |
(a) Replace the air conditioning control assembly (See page
.gif)
).
HINT:
Since the air conditioning control assembly cannot be inspected while it is removed from the vehicle, replace the air conditioning control assembly with a new or a known good one and check that the condition returns to normal.
(b) Operate the air conditioning control assembly to check that it functions properly.
|
Result |
Proceed to |
|---|---|
|
Air conditioning control assembly malfunctions |
A |
|
Air Conditioning control assembly functions properly |
B |
| A | |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| B | |
REPLACE AIR CONDITIONING CONTROL ASSEMBLY |
Ambient Temperature Sensor Circuit (B1412/12)
DESCRIPTION
The ambient temperature sensor is installed in front of the condenser. It detects
the ambient temperature to control air conditioning AUTO mode. This sensor is connected
to the A/C am ...
Air Conditioning Compressor Magnetic Clutch Circuit
DESCRIPTION
When the A/C amplifier is turned on, a magnetic clutch ON signal is sent from
the MGC terminal of the A/C amplifier. Then, the MGC relay turns on to operate the
magnetic clutch.
WIRI ...
Other materials about Toyota Venza:
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
Use the following procedures to troubleshoot the power back door system.
*: Use the Techstream.
PROCEDURE
1.
VEHICLE BROUGHT TO WORKSHOP
NEXT
...
Disassembly
DISASSEMBLY
CAUTION / NOTICE / HINT
NOTICE:
When using a vise, do not overtighten it.
PROCEDURE
1. REMOVE STEERING LOCK ACTUATOR ASSEMBLY (w/ Smart Key System)
(a) Secure the steering column assembly in a vise.
(b) Using a center punch, mark the center ...
Registering ID codes
The tire pressure warning valve and transmitter is equipped with a unique ID
code. When replacing a tire pressure warning valve and transmitter, it is necessary
to register the ID code of tire pressure warning valve and transmitter. Have the
ID code regi ...
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