Part 1
Part 2
On Board Diagnostic
P1229
Fuel Injector, Cylinder 3 - Below Limit
Function
The coil of the fuel injector is supplied directly with B+ (battery voltage) on one side and with ground via an output stage in the DME control
module on the other side.
This DTC is used to monitor the ground trigger.
Short circuit to ground and open circuit are detected when the output stage is blocked, short to B+ when the output stage is conducting.
Diagnosis conditions
- Engine running
- Battery voltage greater than 7 V