B and FRESH

HVAC DTC Troubleshooting: B and FRESH

DTC indicator B and FRESH:

A Problem in the Auxiliary Electric Water Pump Connection

1. Do the Self-Diagnostic Function with the climate control unit Initial Inspection and Diagnostic Overview.

2. Check the DTCs.

Is DTC B and FRESH indicated?

YES -

Go to step 3.

NO -

Intermittent failure. Check for loose wires or poor connections on the auxiliary electric water pump circuit.�

3. Turn the ignition switch to LOCK (0).

4. Disconnect the auxiliary electric water pump 2P connector.

5. Disconnect climate control unit connector B (16P).

6. Check for continuity between climate control unit connector B (16P) terminal No. 4 and auxiliary electric water pump 2P connector terminal No. 1.





Is there continuity?

YES -

Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit Climate Control Unit Removal/Installation.�

NO -

Repair an open in the wire between the climate control unit and the auxiliary electric water pump.�