Random/Multiple Cylinder Misfire
Detected
View and note diagnostic software
freeze frame data if available Make
sure relevant injector and coil
connectors are secure. Disconnect
Engine ECM and proceed to pinpoint
test 1
Cylinder 1 Misfire Detected
Cylinder 2 Misfire Detected
Cylinder 3 Misfire Detected
Check cables and terminal integrity for
the relevant fault code, P0300 will
require all terminals/cables listed to be
checked:
P0301
- Engine ECM pin C23
- Subharness engine inline pin 1
- Engine ECM pin B7
- Subharness engine inline pin 2
- Engine ECM pin B33
P0302
- Engine ECM pin C6
- Subharness engine inline pin 3
- Engine ECM pin B8
- Subharness engine inline pin 4
- Engine ECM pin B22
P0303
- Engine ECM pin C7
- Subharness engine inline pin 5
- Engine ECM pin B5
- Subharness engine inline pin 6
- Engine ECM pin B11
All
- EMS relay pin 5
Rectify fault, proceed to
test 9