B1451/51

DESCRIPTION

In this circuit, the compressor receives a refrigerant compression demand signal from the air conditioning amplifier.
Based on this signal, the compressor changes the amount of compressor output.

DTC No.	DTC Detection Condition	Trouble Area
B1451/51	Open or short in solenoid of the externally changeable compressor circuit	A/C compressor Harness and connector between A/C amplifier and solenoid of externally changeable compressor A/C amplifier

WIRING DIAGRAM

INSPECTION PROCEDURE

1. INSPECT A/C COMPRESSOR

1. Disconnect the A/C compressor connector.

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

   Standard resistance:

   Tester Connection	Condition	Specified Condition
   E8-3 (SOL+) - E8-6 (SOL-)	20°C (68°F)	10 to 11 Ω

NG	REPLACE A/C COMPRESSOR

OK

2. CHECK WIRE HARNESS (A/C COMPRESSOR - BODY GROUND)

1. Disconnect the A/C compressor connector.

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

   Standard resistance:

   Tester Connection	Condition	Specified Condition
   E8-6 (SOL-) - Body ground	Always	Below 1 Ω

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3. CHECK WIRE HARNESS (A/C COMPRESSOR - A/C AMPLIFIER)

1. Disconnect the A/C compressor connector.

2. Disconnect the A/C amplifier connector.

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

   Standard resistance:

   Tester Connection	Condition	Specified Condition
   J58-5 (SOL+) - E8-3 (SOL+)	Always	Below 1 Ω
   J58-5 (SOL+) - Body ground	Always	10 kΩ or higher

   Result:

   Result	Proceed to
   NG	A
   OK (When troubleshooting according to the PROBLEM SYMPTOMS TABLE)	B
   OK (When troubleshooting according to the DTC)	C

B	PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
C	REPLACE AIR CONDITIONING AMPLIFIER

A
REPAIR OR REPLACE HARNESS OR CONNECTOR