P1204

DTC P1204
Injector circuit open circuit or ground short, cylinder 4 (Driving Cycle A)

Possible causes by suggested order of priority:
- Connectors C634, C157, C525.
- Circuit integrity C634/30 (YN) - C525/1 (YN).
- Circuit integrity C525/2 (NO) - C157/3 (NO).
- Supply from C157/3
- Injector
- ECM.

Connectors C634, C157, C525.
- Check for connector not correctly latched, backed out pins, damaged pins, corroded pins

Circuit integrity C634/30 (YN) - C525/1 (YN).
- Check for open circuit, short circuit to ground, supply or other circuit, damaged or unlatched connector, intermediate connectors or headers

Circuit integrity C525/2 (NO) - C157/3 (NO).
- Check for open circuit, short circuit to ground, supply or other circuit, damaged or unlatched connector, intermediate connectors or headers

Supply from C157/3
- Check voltage 10.0 to 14.0 volts

Injector
- Injector resistance.
PASS VALUES: 10 to 20 Ohms.

ECM.
- No detail available for this fault