CAN data bus, immobilizer, testing IMM electrical system

AD80.35-D-6003-04B

CAN data bus, immobilizer, testing IMM electrical system





Scope of test

Tester/test connection

Operation/

Requirement

Specified value

 Possible cause/

Remedy

1.0

CAN dataline

(High/Low)  

to each other

5

A53



6

Ignition: OFF

Sockets of WSP and MSA control units disconnected

>20 kΩ

 Cable

1.1

(High/Low) -//-

5

5

A53



A20.1



6

41

Ignition: OFF

Sockets of WSP and MSA control units disconnected

<5 Ω

 Cables

1.2

(Low)   -





A53

6

Ignition: OFF

Sockets of WSP and MSA control units disconnected

>20 kΩ

 Cable

1.3

(High)   -





A53

5

Ignition: OFF

Sockets of WSP and MSA control units disconnected

>20 kΩ

 Cable

1.4

(Low)   +





A53

6

Sockets of WSP and MSA control units disconnected

Ignition: ON

<1 V

 Cable

1.5

(High)   +





A53

5

Sockets of WSP and MSA control units disconnected

Ignition: ON

<1 V

 Cable

 Further possibilities:

MSA or WSP control unit

(read MSA fault memory with HHT)