DTC B1451: Compressor Solenoid Circuit: Procedure

WARNING: This page is about a different car, the 2011 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.

CHECK HARNESS AND CONNECTOR (COMPRESSOR ASSEMBLY WITH PULLEY - BODY GROUND)

Disconnect the connector from the compressor assembly with pulley (compressor solenoid).

Fig 1: Identifying B7/B94 Connector SOL- Terminal
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard Resistance

Tester Connection	Condition	Specified Condition
B7-1 (SOL-) - Body ground*1	Always	Below 1 Ω
B94-1 (SOL-) - Body ground*2	Always	Below 1 Ω

*1: for TMC Made
*2: except TMC Made

TEXT IN ILLUSTRATION

*A	for TMC Made
*B	except TMC Made
*a	Front view of wire harness connector (to Compressor Assembly with Pulley (Compressor Solenoid))

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

INSPECT COMPRESSOR ASSEMBLY WITH PULLEY (COMPRESSOR SOLENOID)

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

Fig 2: Identifying B7/B94 Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard Resistance

Tester Connection	Condition	Specified Condition
B7-2 (SOL+) - B7-1 (SOL-)*1	20°C (68°F)	10 to 11 Ω
B94-2 (SOL+) - B94-1 (SOL-)*2	20°C (68°F)	10 to 11 Ω

*1: for TMC Made
*2: except TMC Made

TEXT IN ILLUSTRATION

*A	for TMC Made
*B	except TMC Made
*a	Component without harness connected (Compressor Assembly with Pulley (Compressor Solenoid))

Result

Result	Proceed to
OK	A
NG (for 2AZ-FE)	B
NG (for 2ZR-FE)	C

C → See step 7

B → See step 6

A: Go to next step

CHECK HARNESS AND CONNECTOR (COMPRESSOR ASSEMBLY WITH PULLEY - A/C AMPLIFIER)

Disconnect the connector from the A/C amplifier.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
E111-13 (SOL+) - B7-2 (SOL+)*1	Always	Below 1 Ω
E111-13 (SOL+) - B94-2 (SOL+)*2	Always	Below 1 Ω
E62-7 (SOL+) - B94-2 (SOL+)*2	Always	Below 1 Ω
B7-2 (SOL+) - Body ground*1	Always	10 kΩ or higher
B94-2 (SOL+) - Body ground*2	Always	10 kΩ or higher

*1: for TMC Made
*2: except TMC Made

Result

Result	Proceed to
NG	A
OK (When troubleshooting according to Problem Symptoms Table)	B
OK (When troubleshooting according to the DTC)	C

C → See step 5

B → See step 4

A → REPAIR OR REPLACE HARNESS OR CONNECTOR

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE
REPLACE AIR CONDITIONING AMPLIFIER. Refer to REMOVAL
REPLACE COMPRESSOR ASSEMBLY WITH PULLEY (for 2AZ-FE). Refer to REMOVAL
REPLACE COMPRESSOR ASSEMBLY WITH PULLEY (for 2ZR-FE). Refer to REMOVAL