Fault Code | Possible cause | Action |
P1107 | Ambient pressure sensor circuit short circuit to ground | View & note 'freeze frame' data if available. View & note 'sensor' data. Ensure sensor connector is secure. Disconnect ECM and proceed to pinpoint test 1: |
P1108 | Ambient pressure sensor circuit, short circuit to supply or open circuit | Disconnect ambient pressure sensor and proceed to pinpoint test 4: |
Pinpoint Tests
Test | Result | Action |
1. Check cable and terminal integrity: ECM pin A27 ECM pin 820 ECM pin 801 | OK | Disconnect ambient pressure sensor and proceed to test 2 |
Faulty | Rectify fault, proceed to test 5 | |
2. Check cable for short circuit: ECM pin A27 to ECM 820 ECM pin A27 to ground | OK | Proceed to test 3 |
Short circuit | Locate and rectify wiring fault, proceed to test 5 | |
3. Check cable for continuity: ECM pin A27 to sensor pin 1 ECM pin 820 to sensor pin 2 ECM pin 801 to sensor pin 3 | OK | Renew ambient pressure sensor and proceed to test 5 |
Open circuit | Locate and rectify wiring fault, proceed to test 5 | |
4. Check cable for short circuit: ECM pin A27 to ECM pin 801 | OK | Renew ambient pressure sensor and 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 |