Fault Code | Possible cause | Action |
P1631 P1632 | Fall detection switch low input voltage Fall detection switch high input voltage or open circuit | View & note 'freeze frame' data if available. View & note 'sensor' data Ensure switch connector is secure. Disconnect ECM and proceed to pinpoint test 1: |
Pinpoint Tests
Test | Result | Action |
1. Check cable and terminal integrity: ECM pin B21 | OK | Disconnect sensor and proceed to test 2 |
Faulty | Rectify fault, proceed to test 6 | |
2. Check cable for short circuit: ECM pin B21 to ground | OK | Proceed to test 3 |
Short circuit | Locate and rectify wiring fault, proceed to test 6 | |
3. Check cable continuity: ECM pin B01 to sensor pin 4 ECM pin B21 to sensor pin 5 ECM pin B20 to sensor pin 6 | OK | Proceed to test 4 |
Open circuit | Locate and rectify wiring fault, proceed to test 6 | |
4. Check cable for short circuit: ECM pin B21 to ECM pin B 1 ECM pin B21 to ECM pin B20 | OK | Connect ECM and proceed to test 5 |
Short circuit | Locate and rectify wiring fault, proceed to test 6 | |
5. Check voltage (with ignition 'ON') between: Sensor pin 4 and sensor pin 6 | 5V | Renew fall detection switch and proceed to test 6 |
Less than 4.8V | Locate and rectify wiring fault, proceed to test 6 | |
6. Reconnect harness, clear fault code | OK | Action complete, quit test |
Fault still present | Contact Triumph service |