CAN data bus, testing electrical system of fuel injection system (HFM-SFI)

AD07.51-P-6000-41B

CAN data bus, testing electrical system of fuel injection system (HFM-SFI)





Scope of test

Measuring instrument/

Test connection

Operation/Requirement

Specified value

 Possible cause/Remedy

1.0



CAN data bus

L 

N3/4



 H

Ignition: OFF

as of HHT diagnosis identifier 49 (04/95)

Disconnect coupling A from test cable and test with ohmmeter directly at coupling A of engine wiring harness.

GF07.51-P-0001-02E

115–125 Ω

 1.1

 Data bus

1.1

CAN module in control module:

N4/3 or N54

Resistance

 N54 as of HHT diagnosis identifier 49 (04/95) with stage 2 drive authorization system and CAN databus.

L 

N4/3

N54



 H

Remove N4/3 or N54 and test directly at control module.

115–125 Ω

 Control module N4/3 or N54