P1690 - CAN Fault

P1690 - Can Fault - Fault - CM8; CR8; CS8; DR5; DS5; LG1; LGX; LJ2; LK2; LL1; PB1; PJ1; PJZ; PM1; PR1; PRB; PRC; PS1; PSB; PSC; PX1; PXB; PXC; PY1; PYB; PYC

Fault Code

Possible cause

Action

P1690

CAN Fault

View and note 'freeze-frame' data if available.

View and note 'sensor' data.

Make sure Instrument connector is secure.

Disconnect the engine ECM and proceed to pinpoint test 1:

Subheading - Pinpoint Test

Pinpoint Tests

P1690 - Can Fault - Pinpoint Test - LG1; LGX; LL1

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

Subheading - Circuit Diagram

Circuit Diagram

P1690 - Can Fault - Circuit Diagram - LG1; LGX; LL1

CAN Communication PPT (LG1 Instruments)
  1. Instruments

  2. Engine ECM Connector C

  3. Immobiliser/TPMS Control Module

  4. Diagnostic Connector

  5. ABS Control Module