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C-003 Control Unit Hard- and Software 2 > < C-001 Control Unit Hard- and Software

Astra H

C-002 - Engine Running Signal Circuit

Test

Work Order Description

Nominal Value
T001

Diagnostic Trouble Codes

Is the following Diagnostic Trouble Code stored?

C1525

Engine Running Signal (D+) Intermittent
Diagnostic Tester Diagnostic Trouble Code Current Value:
Yes: No:
T002

Check: Wiring Harness
  • Check all wiring and all connectors of this functional group for corrosion and damage.

Note:

Most intermittent problems are caused by faulty electrical connectors, faulty ground connections, broken wiring, temperature problems or radio interference. While performing the troubleshooting move the related connectors, wiring harness and components respectively switch on all electric consumers by turns, because this can cause an electromagnetic interference in a circuit.
Yes: No:
T003

Check: Short to Voltage of Signal Circuit
  • Ignition OFF
  • Disconnect wiring harness connector from:
    X125 Underhood Electronic Module
    and
    X12 Body front & electrohydraulic power steering
  • Ignition ON
  • Measure voltage between the following terminals:
    X12 Body front & electrohydraulic power steering
    Wiring harness connector (male side) terminal 5
    &
    Ground

less than 0.3 V
Voltage Measurement Current Value: V
Yes: No:
T004

Check: Short to Ground of Signal Circuit
  • Ignition OFF
  • Measure resistance between the following terminals:
    X12 Body front & electrohydraulic power steering
    Wiring harness connector (male side) terminal 5
    &
    Ground

greater than 500 kOhm
Resistance Measurement Current Value: kOhm
Yes: No:
T005

Check: Interruption of Signal Circuit
  • Measure resistance between the following terminals:
    X12 Body front & electrohydraulic power steering
    Wiring harness connector (male side) terminal 5
    &
    X125 Underhood Electronic Module
    Wiring harness connector (wiring harness side) terminal 26 (XE2)

less than 5 Ohm
Resistance Measurement Current Value: Ohm
Yes: No:
T006

Check: Vehicle Configuration

Is the following information correct for the actual vehicle?

Vehicle with REC (Rear Electronic Module)
Yes: No:
T007

Check: Interruption of Signal Circuit
  • Measure resistance between the following terminals:
    X12 Body front & electrohydraulic power steering
    Wiring harness connector (male side) terminal 5
    &
    X125 Underhood Electronic Module
    Wiring harness connector (wiring harness side) terminal 8 (XE2)

less than 5 Ohm
Resistance Measurement Current Value: Ohm
Yes: No:
T008

Check: Interruption of Signal Circuit
  • Measure resistance between the following terminals:
    X125 Underhood Electronic Module
    Wiring harness connector (wiring harness side) terminal 5 (XE3)
    &
    X125 Underhood Electronic Module
    Wiring harness connector (wiring harness side) terminal 40 (XE3)

less than 5 Ohm
Resistance Measurement Current Value: Ohm
Yes: No:
T009

Check: Vehicle Configuration

Is the following information correct for the actual vehicle?

Vehicle with REC (Rear Electronic Module)
Yes: No:
T010

Check: Short to Ground of Signal Circuit
  • Measure resistance between the following terminals:
    X125 Underhood Electronic Module
    Wiring harness connector (wiring harness side) terminal 40 (XE3)
    &
    Ground

greater than 500 kOhm
Resistance Measurement Current Value: kOhm
Yes: No:
T011

Check: Vehicle Configuration

Is the following information correct for the actual vehicle?

Vehicle with REC (Rear Electronic Module)
Yes: No:
T012

Check: Vehicle Configuration

Is the following information correct for the actual vehicle?

Vehicle without REC (Rear Electronic Module)
Yes: No:
T013

Check: Short to Voltage of Signal Circuit
  • Measure voltage between the following terminals:
  • X125 Underhood Electronic Module
    Wiring harness connector (male side) terminal 40 (XE3)
    &
    Ground

less than 0.3 V
Voltage Measurement Current Value: V
Yes: No:


Result

Cause Of Fault
E001 Result: Defective Component
  • Defective component:
    A75 Assembly - Electrical Power Steering
    or
    X125 Underhood Electronic Module

Important:

Reset the concerned control unit with the diagnostic tester before replacing it. In order to do that, call up the "RESET" function from the PROGRAMMING menu of the current system on the diagnostic tester.

Note:

The replacement of the components must be done in the listed order.

The system must be checked for proper operation after every replacement.
E002 Result: Interruption
  • Circuit interruption between:
    X125 Underhood Electronic Module
    Wiring harness connector (wiring harness side) terminal 26 (XE2)
    &
    X12 Body front & electrohydraulic power steering
    Wiring harness connector (male side) terminal 5
E003 Result: Interruption
  • Circuit interruption between:
    X125 Underhood Electronic Module
    Wiring harness connector (wiring harness side) terminal 40 (XE3)
    &
    X125 Underhood Electronic Module
    Wiring harness connector (wiring harness side) terminal 5 (XE3)
E004 Result: Interruption
  • Circuit interruption between:
    X125 Underhood Electronic Module
    Wiring harness connector (wiring harness side) terminal 8 (XC2)
    &
    X12 Body front & electrohydraulic power steering
    Wiring harness connector (male side) terminal 5
E005 Result: Short to Ground
  • Short circuit to ground between:
    X125 Underhood Electronic Module
    Wiring harness connector (wiring harness side) terminal 26 (XE2)
    &
    X12 Body front & electrohydraulic power steering
    Wiring harness connector (male side) terminal 5
E006 Result: Short to Ground
  • Short circuit to ground between:
    X125 Underhood Electronic Module
    Wiring harness connector (wiring harness side) terminal 8 (XE2)
    &
    X12 Body front & electrohydraulic power steering
    Wiring harness connector (male side) terminal 5
E007 Result: Short to Ground
  • Short circuit to ground between:
    X125 Underhood Electronic Module
    Wiring harness connector (wiring harness side) terminal 40 (XE3)
    &
    X125 Underhood Electronic Module
    Wiring harness connector (wiring harness side) terminal 5 (XE3)
E008 Result: Short to Voltage
  • Short circuit to voltage between:
    X125 Underhood Electronic Module
    Wiring harness connector (wiring harness side) terminal 26 (XE2)
    &
    X12 Body front & electrohydraulic power steering
    Wiring harness connector (male side) terminal 5
E009 Result: Short to Voltage
  • Short circuit to voltage between:
    X125 Underhood Electronic Module
    Wiring harness connector (wiring harness side) terminal 5 (XE3)
    &
    X125 Underhood Electronic Module
    Wiring harness connector (wiring harness side) terminal 40 (XE3)
    &
    X125 Underhood Electronic Module
    Wiring harness connector (wiring harness side) terminal 8 (XE2)
    &
    X12 Body front & electrohydraulic power steering
    Wiring harness connector (wiring harness side) terminal 5
E010 Checking Procedure Validity
  • The selected Checking Procedure is not valid for this vehicle configuration.





C-003 Control Unit Hard- and Software 2 > < C-001 Control Unit Hard- and Software