Vectra H CAN problem

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Vectra H CAN problem

Postby Droidkiller » Fri Jul 21, 2017 7:42 am

Hi all!

I have U2103 C and U2105 DTC,Opel Vectra C 2003 Z16XE on all ECUs connected to high speed CAN bus.
Signals seems to be good,tried to change CIM module,the gateway between low and high peed bus,but still have DTC :roll:
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Re: Vectra H CAN problem

Postby liviu2004 » Fri Jul 21, 2017 5:44 pm

I will check home, but I think Opel says if no functional complain, ignore trouble code.
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Re: Vectra H CAN problem

Postby STC » Fri Jul 21, 2017 7:12 pm

Adding to above post.

Is there a functional fault with the car ?
Can you communicate with and read plausible data from every control module in the car ?
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Re: Vectra H CAN problem

Postby liviu2004 » Fri Jul 21, 2017 9:20 pm

Field Remedy: 1441
Subject: CAN BUS - Stored TC
Vectra-C 2002...2003
Remedy:
Due to the CAN-Bus self diagnosis function different diagnostic trouble codes (DTC) can be stored in the ECU although no ECU malfunction can be observed. The below listed DTC's require a special handling, deviating from the working description in the checking procedure.
Two different categories are to distinguish:
1) DTC present, no malfunction shown in Pos. 1.
2) DTC not present, no malfunction shown in Pos. 2.
In general all DTC's with the status "history" have to be ignored, if no plausible ECU malfunction can be referred to the DTC, or no customer complaint is reported.

U2105-U2149 all Contr. CAN-Bus no Communication with XXX units (Name of Control Module)
No malfunction DTC is not present All vehicles.
ignore.
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Re: Vectra H CAN problem

Postby Droidkiller » Sun Jul 23, 2017 7:48 am

First of all,thanks guys for trying help!

Car runs normally,but the ESP fault lamp on the dashboard indicates the problem.

After deleting all DTC,and scan system again:

ABS/TCS/ESP-ECB430EV:

U2103:High speed CAN bus no communication intermittent
U2142:Yaw rate sensor no communication intermittent

EHPS(Electrohidraulic Power steering:

U2139:Invalid signal from CIM(Steering column module) present


SRS:

U2139:invalid signal from CIM present
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Re: Vectra H CAN problem

Postby STC » Mon Jul 24, 2017 11:05 pm

EHPS(Electrohidraulic Power steering:
U2139:Invalid signal from CIM(Steering column module) present

SRS:
U2139:invalid signal from CIM present


Here you have 2 different control units (EHPS & SRS) that they are getting an "Invalid" signal from CIM. I would interpret that as the CAN is good however the messages on the network are corrupt, a software issue rather than Hardware.

The CIM is the "CAN Gateway" in that car !

You could remove everything off the High Speed Network and leave just

1. CIM & EHPS,
then CIM & SRS
next CIM, SRS & EHPS

If any of the removed units carry the Terminating resistors then you will have to emulate those into the loom to stop the bounce and the rounded edges.
Last edited by STC on Fri Jul 28, 2017 1:06 am, edited 1 time in total.
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Re: Vectra H CAN problem

Postby Droidkiller » Tue Jul 25, 2017 6:03 am

Thanks for a good tip,I'll try next time when the the car is here again.
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Re: Vectra H CAN problem

Postby Mark Dalton » Thu Aug 10, 2017 12:54 am

Steering angle sensor is incorperated in to the CIM Module on these cars, the invalid data could be incorrect steering angle data. You should be able to look at the steering angle via ABS/ESP data.
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