P1841

DTC P1841
CAN bus monitoring.
Possible causes by suggested order of priority:
^ Petrol Only - Connector(s) EAT C193,C637.
^ Diesel Only - Connector(s) EAT C193,C158.
^ Petrol Only - Open circuit C193/16 (W) to C637/36 (W).
^ Diesel Only - Open circuit C193/16 (W) to C158/35 (W).
^ Petrol Only - Open circuit C193/44 (Y) to C637/37 (Y).
^ Diesel Only - Open circuit C193/44 (Y) to C158/32 (Y).
^ Faulty transmission ECU.
^ Faulty engine management ECM.

Petrol Only - Connector(s) EAT C193,C637.
CONNECTOR
^ Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.

Diesel Only - Connector(s) EAT C193,C158.
CONNECTOR
^ Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.

Petrol Only - Open circuit C193/16 (W) to C637/36 (W).
OPEN_CIRCUIT
^ Check resistance > 1M Ohm

Diesel Only - Open circuit C193/16 (W) to C158/35 (W).
OPEN_CIRCUIT
^ Check resistance > 1M Ohm

Petrol Only - Open circuit C193/44 (Y) to C637/37 (Y).
OPEN_CIRCUIT
^ Check resistance > 1M Ohm

Diesel Only - Open circuit C193/44 (Y) to C158/32 (Y).
OPEN_CIRCUIT
^ Check resistance > 1M Ohm

Faulty Transmission ECU.
CHECK THE FOLLOWING:
^ Ensure that the open circuit checks have been carried out.
^ Check transmission ECU by substitution with a known good unit.
POSSIBLE FAULTS
^ Faulty transmission ECU.

Faulty Engine Management ECM.
CHECK THE FOLLOWING:
^ Ensure that the open circuit checks have been carried out.
^ If TestBook available, carry out diagnostic checks on ECM.
^ Check ECM by substituting a known good unit.
POSSIBLE FAULTS
^ Faulty ECM.