P0201-FUEL INJECTOR 1 CIRCUIT/OPEN

For a complete wiring diagram Refer to Section 8W

When Monitored:
With battery voltage greater than 10 volts, ASD relay energized, and engine speed less than 3000 rpm.
Set Condition:
The PCM detects an open condition on the Fuel Injector 1 circuit.

Possible Causes

INTERMITTENT DTC

(K343) FUSED MAIN RELAY OUTPUT CIRCUIT OPEN OR HIGH RESISTANCE

(K11) INJECTOR 1 CONTROL CIRCUIT OPEN OR HIGH RESISTANCE

FUEL INJECTOR 1

POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

Diagnostic Test

1.DTC IS ACTIVE

NOTE: Diagnose and repair any system voltage or sensor reference voltage DTCs before continuing with this test.

WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in personal injury or death.

Is the status Active for this DTC?

Yes

Go to 2

Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

2.(K343) FUSED MAIN RELAY OUTPUT CIRCUIT OPEN OR HIGH RESISTANCE

NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.

Is the test light illuminated and bright?

Yes

Go to 3

Repair the (K343) Fused Main Relay Output circuit for an open circuit or high resistance.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).

3.(K11) INJECTOR 1 CONTROL CIRCUIT OPEN OR HIGH RESISTANCE

Is the resistance below 5.0 ohms?

Yes

Go to 4

Repair the (K11) Injector 1 Control circuit for an open circuit or high resistance.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).

4.FUEL INJECTOR 1

NOTE: The resistance of the circuit will vary according to the temperature of the injector coil. Use the table below to determine the resistance range of the injector.

Fuel Injector Coil Resistance Based on Engine Temperature
Temperature	Resistance
–20° C (–4° F)	10 ohms (+/– .6 ohms)
20° C (68° F)	12 ohms (+/– .6 ohms)
60° C (140° F)	14 ohms (+/– .6 ohms)
100° C (212° F)	16 ohms (+/– .6 ohms)

Is the resistance of the injector within the specified range?

Yes

Go to 5

Replace Fuel Injector 1 in accordance with the Service Information.
Perform the PCM Verification Test. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

5.POWERTRAIN CONTROL MODULE (PCM)

Were any problems found?

Yes

Repair as necessary.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).

Replace and program the Powertrain Control Module (PCM) in accordance with the Service Information.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).