5 Volt Sensor Supply Circuit
Fault Code
Possible Cause
Action
P1698
5 V sensor supply malfunction
View and note 'sensor' data
Note Engine ECM sensors
requiring a power supply will not
be active
Disconnect Engine ECM and
proceed to pinpoint test 1:
Pinpoint Tests
Test
Result
Action
1
Check cable and terminal integrity:
- Engine ECM pin B18
- Engine ECM pin B34
OK
Proceed to test 2
Faulty
Rectify fault, proceed to test 5
2
Check cable for short circuit
- Engine ECM pin B18 to Engine ECM
pin B34
OK
Proceed to test 4
Faulty
Proceed to test 3
3
Disconnect the following sensors in
turn:
- MAP sensor
- Ambient pressure sensor
- Gear position sensor
And retest for short circuit:
- Engine ECM pin B18 to Engine ECM
pin B34
OK
Replace sensor last removed and
proceed to test 5
Faulty
Proceed to test 4
4
Check cable for short circuit:
- Engine ECM pin B18 to ground
- Engine ECM pin B34 to ground
- Engine ECM pin B18 to Engine ECM
pin A01
- Engine ECM pin B34 to Engine ECM
pin A01
- Engine ECM pin B18 to battery
positive
- Engine ECM pin B34 to battery
positive
OK
Proceed to test 5
Short circuit
Locate and rectify wiring fault, proceed
to test 5
5
Reconnect harness, clear fault code
and use service tool to check for
correct sensor outputs and 5 V sensor
supply Voltage level
OK
Action complete - quit test
Fault still present
Contact Triumph service
Circuit Diagram
Tiger Explorer XR Series
290 of 746
FUEL SYSTEM / ENGINE MANAGEMENT
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