Oxygen Sensor; Pinpoint Tests - Triumph Thunderbird Service Manual

Fuel System/Engine Management
Oxygen Sensor
Fault Code Possible cause
Action
POBO Cleft) Oxygen sensor circuit fault.
View 8. note 'freeze frame' data if
P0150 (right>
Oxygen sensor left hand and right available.
hand
View 8. note 'sensor' data.
Ensure sensor connector is secure.
Disconnect ECM and proceed to
pinpoint test 1:
Pinpoint Tests
Test
Result Action
1 Check cable and terminal integrity: OK
Disconnect oxygen sensors and proceed to
test 2
- ECM pin A26
Faulty Rectify fault, proceed to test 5
- ECM pin A30
- ECM pin B20
2 Check cable for short circuit: OK
Proceed to test 3
- ECM pin A26 to earth Short circuit
Locate and rectify wiring fault, proceed to
- ECM pin A30 to earth
test 4
3 Check cable continuity: OK
Proceed to test 4
- ECM pin A26 to left hand oxygen sensor Open circuit Locate and rectify wiring fault, proceed to
pin 2
test 4
- ECM pin A30 to right hand oxygen
sensor pin 2
- ECM pin B20 to relevant oxygen sensor
pin 1
4 check cable for short circuit: OK
Renew relevant oxygen sensor, proceed to
- ECM pin B20 to ECM pin A26 (left hand
test 5
-
oxygen sensor)
Short circuit Locate and rectify wiring fault, proceed to
- ECM pin B20 to ECM pin A30 (right test 5
hand oxygen sensor)
5 Reconnect harness, clear fault code and run OK Action complete - quit test
engine.
Check adaptation status Fault still present Contact Triumph service
10.54
SelVice Manual - Thunderbird