Toyota Camry (XV70): Compressor Solenoid Circuit (B1451)
DESCRIPTION
In this circuit, the compressor assembly with pulley (compressor solenoid)*1 or cooler compressor assembly (compressor solenoid)*2 receives refrigerant compression demand signals from the air conditioning amplifier assembly.
Based on this signal, the compressor assembly with pulley (compressor solenoid)*1 or cooler compressor assembly (compressor solenoid)*2 changes the amount of compressor output.
|
DTC No. | Detection Item |
DTC Detection Condition | Trouble Area |
Memory |
|---|---|---|---|---|
| B1451 |
Compressor Solenoid Circuit |
Open or short in compressor solenoid circuit |
| - |
- *1: for A25A-FKS
- *2: for 2GR-FKS
WIRING DIAGRAM
for A25A-FKS
for 2GR-FKS
PROCEDURE
| 1. |
CONFIRM MODEL |
|
Result | Proceed to |
|---|---|
|
for A25A-FKS | A |
|
for 2GR-FKS | B |
| B |
.gif) | GO TO STEP 4 |
|
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| 2. |
INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY |
|
*a | Front view of wire harness connector (to Compressor Assembly with Pulley (Compressor Solenoid)) |
(a) Disconnect the C98 compressor assembly with pulley (compressor solenoid) connector.
(b) Connect an oscilloscope to terminal C98-2 (SOL+) and body ground and check the waveform.
OK:
Waveform is similar to that shown in the illustration.
|
Item | Content |
|---|---|
|
Tool Setting | 5 V/DIV., 500 ?s./DIV. |
|
Condition |
|
| OK | | REPLACE COMPRESSOR ASSEMBLY WITH PULLEY (COMPRESSOR SOLENOID)
|
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|
| 3. |
CHECK HARNESS AND CONNECTOR (COMPRESSOR ASSEMBLY WITH PULLEY (COMPRESSOR SOLENOID) - AIR CONDITIONING AMPLIFIER ASSEMBLY) |
(a) Disconnect the K54 air conditioning amplifier assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
C98-2 (SOL+) - K54-3 (SOL+) |
Always | Below 1 ? |
|
C98-2 (SOL+) or K54-3 (SOL+) - Other terminals and body ground |
Always | 10 k? or higher |
| OK | | REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
| 4. |
INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY |
|
*a | Front view of wire harness connector (to Cooler Compressor Assembly (Compressor Solenoid)) |
(a) Disconnect the C62 cooler compressor assembly (compressor solenoid) connector.
(b) Connect an oscilloscope to terminal C62-2 (SOL+) and body ground and check the waveform.
OK:
Waveform is similar to that shown in the illustration.
|
Item | Content |
|---|---|
|
Tool Setting | 5 V/DIV., 500 ?s./DIV. |
|
Condition |
|
| OK | | REPLACE COOLER COMPRESSOR ASSEMBLY (COMPRESSOR SOLENOID)
|
|
| 5. |
CHECK HARNESS AND CONNECTOR (COOLER COMPRESSOR ASSEMBLY (COMPRESSOR SOLENOID) - AIR CONDITIONING AMPLIFIER ASSEMBLY) |
(a) Disconnect the K54 air conditioning amplifier assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
C62-2 (SOL+) - K54-3 (SOL+) |
Always | Below 1 ? |
|
C62-2 (SOL+) or K54-3 (SOL+) - Other terminals and body ground |
Always | 10 k? or higher |
| OK | | REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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PROCEDURE
1.
CHECK C
Installation
INSTALLATION PROCEDURE 1. INSTALL NO. 1 VACUUM HOSE CONNECTOR (for A25A-FKS)
(a) Align the No. 1 vacuum hose connector with the vacuum pump assembly, and push them together until the No. 1 vacuum hose connector makes a "click" sound.
NOTICE:
Check that there is no foreign matter on the conne
