Checking communication, continued
Check the cable between Combustion Preheater Module (CPM) #6 and Central Electronic Module (CEM) #18A for a loose connection as described in Loose connections (terminals) and short-circuit to ground, Short-circuit to ground, permanent faults .
HINT: All communication between the additional heater and the central electronic module (CEM) is via this cable.
Also check the connectors.
Remedy as necessary.
Other information:
- To access the control module / connect the breakout box, see Connecting the breakout box .
- For information about additional heater module signals, see Signal specification .
- For information about central electronic module signals, see Signal specification .
- Continue
Refer to Verification