•
Fault Code
Possible cause
Action
P1631
Fall detection switch low input voltage
View & note 'freeze frame' data if available. .
P1632
Fall
detection
switch
high
input
voltage or open circuit
1
Test
Result
Action
Check cable and terminal integrity:
OK
Disconnect sensor and proceed to test 2
- ECM pin B21
Faulty
Rectify fault, proceed to test 6
OK
Proceed to test 3
- ECM pin B21 to ground - ECM pin B21 to ECM pin A6
Short circuit
Locate and rectify wiring fault, proceed to test
Check cable continuity:
OK
Proceed to test 4
- ECM pin B1 to sensor pin 4 - ECM pin B21 to sensor pin 5 - ECM pin B20 to sensor pin 6
Open circuit
Locate and rectify wiring fault, proceed to test
2 Check cable for short circuit:
3
View & note sensor' data Ensure switch connector is secure. Disconnect ECM and proceed to pinpoint test1:
4 Check cable for short circuit: - Sensor pin 4 to sensor pin 5 - Sensor pin 4 to sensor pin 6 5 Check voltage (with ignition on): - Sensor pin 4 6 Reconnect harness, clear fault code.
6
6 OK
Proceed to test 5
Short circuit
Locate and rectify wiring fault, proceed to test 6
5V
Renew fall detection switch and proceed to test 6
Less than 4.8V
Locate and rectify wiring fault, proceed to test 6
OK
Action complete, quit test
Fault still present
Contact Triumph service
Circuit Diagram
Fall Detection Switch
ECM
10.84
B20
KB
b
B21
KU
5
Bl
K
4
Service Manual - Tiger
uM^