Toyota Venza manuals

Toyota Venza: Compressor Solenoid Circuit (B1451/51)

DESCRIPTION

In this circuit, the A/C compressor receives a refrigerant compression demand signal from the A/C amplifier.

Based on this signal, the A/C compressor changes the amount of compressor output.

DTC No.

DTC Detection Condition

Trouble Area

B1451/51

Open or short in A/C compressor solenoid circuit

  • A/C compressor (solenoid valve)
  • Harness or connector between A/C amplifier and A/C compressor (solenoid valve)
  • A/C amplifier

WIRING DIAGRAM


PROCEDURE

1.

INSPECT A/C COMPRESSOR (SOLENOID VALVE)

(a) Disconnect the A/C compressor (solenoid valve) connector.


(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

B29-2 (SOL+) - B29-1 (SOL-)

20°C (68°F)

10 to 11 Ω

Result

Proceed to

OK

A

NG (for 2GR-FE)

B

NG (for 1AR-FE)

C

Text in Illustration

*1

Component without harness connected

(A/C Compressor (Solenoid Valve))


B

REPLACE A/C COMPRESSOR (SOLENOID VALVE)


C

REPLACE A/C COMPRESSOR (SOLENOID VALVE)


A

2.

CHECK HARNESS AND CONNECTOR (A/C COMPRESSOR (SOLENOID VALVE) - BODY GROUND)

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

B29-1 (SOL-) - Body ground

Always

Below 1 Ω

Text in Illustration

*1

Front view of wire harness connector

(to A/C Compressor (Solenoid Valve))



NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

3.

CHECK HARNESS AND CONNECTOR (A/C COMPRESSOR (SOLENOID VALVE) - A/C AMPLIFIER)

(a) Disconnect the A/C amplifier connector.


(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

D47-2 (SOL+) - B29-2 (SOL+)

Always

Below 1 Ω

D47-2 (SOL+) - Body ground

Always

10 kΩ or higher

Result:

Result

Proceed to

NG

A

OK (When troubleshooting according to Problem Symptoms Table)

B

OK (When troubleshooting according to the DTC)

C

Text in Illustration

*1

Front view of wire harness connector

(to A/C Amplifier)

*2

Front view of wire harness connector

(to A/C Compressor (Solenoid Valve))



A

REPAIR OR REPLACE HARNESS OR CONNECTOR


B

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE


C

REPLACE A/C AMPLIFIER

Driver Side Solar Sensor Short Circuit (B14A2)
DESCRIPTION The solar sensor is installed on the upper side of the instrument panel. It detects sunlight to control air conditioning AUTO mode. The output voltage from the solar sensor varies i ...

BUS IC Communication Malfunction (B1497/97)
DESCRIPTION The air conditioning harness connects the A/C amplifier and each servo. The A/C amplifier supplies power and sends operation instructions to each servo through the air conditioning ha ...

Other materials about Toyota Venza:

Canceling the power back door system (vehicles with power back door)
Turn the main switch to disable the power back door system. 1. Inoperative 2. Operative The back door cannot be operated even with the wireless remote control or power back door switch. A buzzer will sound twice if the power back door switch is pressed ...

Dtc Check / Clear
DTC CHECK / CLEAR 1. CHECK DTC (a) Connect the Techstream to the DLC3. (b) Turn the ignition switch to ON. (c) Turn the Techstream on. (d) Read the DTCs by following the directions on the Techstream screen. HINT: Refer to the Techstream operator's m ...

Brake fluid
 - Checking fluid level The brake fluid level should be between the “MAX” and “MIN” lines on the tank. Make sure to check the fluid type and prepare the necessary items.  - Adding fluid  - Brake fluid can absorb moisture from the ...

© 2016-2023 Copyright www.tovenza.com

0.1381