U1518

87

Engine ECM CAN 1 Circuit Fault

Make sure the diagnostic tool is using the latest software version.

Update all ECM software.

Clear fault code and retest.

If fault is still present proceed to pinpoint test 1:

U1530

87

U1540

87

U1550

87

U1570

87

Test

Result

Action

1

Check cable and terminal integrity:

- Engine ECM pin C24

- Engine ECM pin C25

- Instrument pin 3

- Instrument pin 2

- ABS module pin 2

- ABS module pin 11

- Diagnostic connector pin 6

- Diagnostic connector pin 14

- Immobiliser module pin 1

- Immobiliser module pin 6

OK

Disconnect instruments and proceed to test 2

Faulty

Rectify fault, proceed to test 5

2

Check cable for short circuit:

- Engine ECM pin C24 to ground

- Engine ECM pin C25 to ground

OK

Proceed to test 3

Short circuit

Locate and rectify wiring fault, proceed to test 5

3

Check cable continuity:

- Engine ECM pin C24 to Instrument pin 3

- Engine ECM pin C25 to Instrument pin 2

- Engine ECM pin C24 to ABS control module pin 11

- Engine ECM pin C25 to ABS control module pin 2

- Engine ECM pin C24 to Diagnostic connector pin 14

- Engine ECM pin C25 to Diagnostic connector pin 6

- Engine ECM pin C24 to Immobiliser module pin 1

- Engine ECM pin C25 to Immobiliser module pin 6

OK

Proceed to test 4

Open circuit

Locate and rectify wiring fault, proceed to test 5

4

Check cable for short circuit:

- Engine ECM pin C24 to Engine ECM pin C25

OK

Proceed to test 5

Short circuit

Locate and rectify wiring fault, proceed to test 5

5

Reconnect harness, clear fault code and run engine.

OK

Action complete - quit test

Fault still present

Contact Triumph service