P0203

Tests 1 - 3:

Tests 4 - 7:

SYMPTOM
P0203-INJECTOR # 3 CONTROL CIRCUIT

TEST NOTE
All symptoms listed above are diagnosed using the same tests. The title for the tests will be P0201-INJECTOR # 1 CONTROL CIRCUIT.

WHEN MONITORED
With battery voltage greater than 10.4 volts, the auto shutdown relay energized, injector pulse width less than 10 ms, and engine speed less than 3000 rpm.

SET CONDITION
This trouble code takes 0.64 to 10.0 seconds to set when no inductive kick is sensed 0.18 ms after injector turn OFF, and with no other injectors ON.

POSSIBLE CAUSES
- Wiring harness inspection
- ASD relay output circuit
- Fuel injector
- Fuel injector driver circuit open
- Fuel injector driver circuit shorted to ground
- Powertrain control module