Diagnostic Trouble Code (DTC) Information ECM-B102486

Condition 

Central electronic module (CEM) has the overall function for monitoring the signals from Start control module (SCU).

Engine control module (ECM) receives the start signal partly from a directly connected cable from Start control module (SCU), as well as from Central electronic module (CEM) via CAN-communication.

Engine control module (ECM) checks so that the signal from Central electronic module (CEM) is reliable.

The diagnostic trouble code (DTC) is stored if the control module detects that:

• The quality of the signal coming via CAN is too low.

The control module's test for the diagnostic trouble code (DTC) starts in the event of:

• Start of engine.

Substitute Value 

• The signal on the direct-connected cable to Engine control module (ECM) is used.

Possible Source 

• Open-circuit in the communication cable.
• Short-circuit to ground in the communication cable.
• Short-circuit to supply voltage in the communication cable.
• Contact resistance or oxidation in the terminals.
• Open-circuit in terminals.
• Short-circuit in connections.

Fault symptom[s] 

• Autostart; No Functionality