Possible Causes
| Possible Causes |
|---|
| CAN B BUS (+) AND (-) CIRCUIT OPEN |
| CAN B BUS (+) CIRCUIT SHORTED TO VOLTAGE |
| CAN B BUS (-) CIRCUIT SHORTED TO VOLTAGE |
| CAN B BUS (+) CIRCUIT SHORTED TO GROUND |
| CAN B BUS (-) CIRCUIT SHORTED TO GROUND |
| CAN B BUS (+) CIRCUIT SHORTED TO CAN B BUS (-) CIRCUIT |
| ANY CAN B BUS MODULE |
Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .