Injector (FI)

DIAGNOSTIC CODES:
P01201/P0201, P01202/P0202, P01203/P0203,
P01204/P0204, P01205/P0205, P01206/P0206

Fig. 2 Injector - Sectional View:

Fig. 1:

Two double sampled tests are used to check injector operation.

The first test operates while the engine is running, the second operates during stall or power-down. When sufficient events have occurred to register a fault with the engine running a hardware fault is present. When sufficient events have occurred to register a fault with the engine stalled or during power-down,an injector ground short or open circuit fault is present. There is no injector default strategy.

The strategy will report to the Diagnostic Status Manager (DSM) when an injector fault is present and the DSM will then decide whether to store a fault code and illuminate the MIL Lamp.

Problems with the injectors may be detected using two tests; the first cannot distinguish between open circuit and short to battery or ground faults, the second isolates the short to battery condition. Resistance - 15.9±0.35 ohms at 20 °C. At idle, pulse width is approximately 2.4 ms.

Injector Circuit
Injector Circuit - Cylinder 1, P0201
Injector Circuit - Cylinder 2, P0202
Injector Circuit - Cylinder 3, P0203
Injector Circuit - Cylinder 4, P0204
Injector Circuit - Cylinder 5, P0205
Injector Circuit - Cylinder 6, P0206

Possible causes:
- Injector harness problem
- Injector coil fault
- ECM fault - injector drive circuit problem

Injector Circuit Open Circuit or Short Circuit
Cylinder 1, P01201
Cylinder 2, P01202
Cylinder 3, P01203
Cylinder 4, P01204
Cylinder 5, P01205
Cylinder 6, P01206

Possible causes:
- Injector harness problem - injector N
- Injector coil fault - injector N
- ECM fault - injector drive circuit problem