DTC Troubleshooting: B2988 (C-B1), B2988 (C-B2), B2988 (61)
DTC B2988 or DTC screen C-B1: An Open in the A/C Compressor Variable Capacity Control Solenoid Circuit
DTC B2988 or DTC screen C-B2: A Short in the A/C Compressor Variable Capacity Control Solenoid Circuit
DTC B2988 or DTC indicator 61: A Problem in the A/C Compressor Variable Capacity Control Solenoid Circuit
DTC Description
DTC
B2988 A problem in the A/C compressor variable capacity control solenoid circuit
  

1.
Problem verification:

Problem verification
?1.
Clear the DTCs with the HDS.


?2.
Turn the vehicle to the OFF (LOCK) mode and then the ON mode.

?3.
Do the Self-Diagnostic Function with the HDS or the climate control unit.

?4.
Wait for at least 1 minute.

?5.
Check for DTCs.
DTC Description
DTC
B2988 A problem in the A/C compressor variable capacity control solenoid circuit
  

Is DTC B2988 or Error on the DTC screen C-B1 (climate control panel without display) or C-B2 (climate control panel without display) or 61 (climate control panel with display) indicated?

     
YES
     
     
     
Go to step 2.
     
NO
     
     
     
Intermittent failure. Check for loose wires or poor connections on the A/C compressor variable capacity control solenoid circuit.?
2.
Open wire check (SOL OUT line):

Open wire check (SOL OUT line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connectors.
Climate control unit connector A (32P)
A/C compressor clutch 3P connector

?3.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
Climate control unit connector A (32P): disconnected
A/C compressor clutch 3P connector: disconnected
Test point 1
Climate control unit connector A (32P) No. 30
Test point 2
A/C compressor clutch 3P connector No. 2


Is there continuity?

     
YES
     
     
     
The SOL OUT wire is not open. Go to step 3.
     
NO
     
     
     
Repair an open in the SOL OUT wire.?
3.
Open wire check (SOL IN line):

Open wire check (SOL IN line)
?1.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
Climate control unit connector A (32P): disconnected
A/C compressor clutch 3P connector: disconnected
Test point 1
Climate control unit connector A (32P) No. 14
Test point 2
A/C compressor clutch 3P connector No. 3


Is there continuity?

     
YES
     
     
     
The SOL IN wire is not open. Go to step 4.
     
NO
     
     
     
Repair an open in the SOL IN wire.?
4.
Shorted wire check (SOL OUT line):

Shorted wire check (SOL OUT line)
?1.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
Climate control unit connector A (32P): disconnected
A/C compressor clutch 3P connector: disconnected
Test point 1
Climate control unit connector A (32P) No. 30
Test point 2
Body ground

Is there continuity?

     
YES
     
     
     
Repair a short to ground in the SOL OUT wire.?
     
NO
     
     
     
The SOL OUT wire is OK. Go to step 5.
5.
Shorted wire check (SOL IN line):

Shorted wire check (SOL IN line)
?1.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
Climate control unit connector A (32P): disconnected
A/C compressor clutch 3P connector: disconnected
Test point 1
Climate control unit connector A (32P) No. 14
Test point 2
Body ground

Is there continuity?

     
YES
     
     
     
Repair a short to ground in the SOL IN wire.?
     
NO
     
     
     
The SOL IN wire is OK. Go to step 6.
6.
A/C compressor variable capacity control solenoid check:

A/C compressor variable capacity control solenoid check
?1.
Test the A/C compressor variable capacity control solenoid.

Is the variable capacity control solenoid OK?

     
YES
     
     
     
     
NO