Test H: The Climate Control Assembly Does Not Respond To The Diagnostic Tool

PINPOINT TEST H: THE CLIMATE CONTROL ASSEMBLY DOES NOT RESPOND TO THE DIAGNOSTIC TOOL

H1-H2:

H2-H3:

Normal Operation
The climate control assembly communicates with the diagnostic tool through the standard corporate protocol (SCP) communications network, circuits 914 (TN/OG) and 915 (PK/LB). Check the SCP circuits between the climate control assembly C228b and the data link connector (DLC) C251. The total resistance values must not be more than 5 ohms. If the resistance is more than 5 ohms, there is an open circuit in the SCP network, damage to the DLC C251, or damage to the climate control assembly C228b.

Possible Causes
- SCP data plus circuit 914 (TN/OG) open
- SCP data minus circuit 915 (PK/LB) open
- climate control assembly C228b
- climate control assembly