P0201, P0202, P0203, P0204

DTC Code	DTC Name
P0201	Injector Circuit / Open - (Cylinder 1)
P0202	Injector Circuit / Open - (Cylinder 2)
P0203	Injector Circuit / Open - (Cylinder 3)
P0204	Injector Circuit / Open - (Cylinder 4)

DESCRIPTION

The D-4S system has two injection systems. One is the in-cylinder direct injection system that directly injects pressurized fuel into the combustion chamber. The other is the intake port injection system. The ECM determines the percentage of in-cylinder direct injection to the intake port injection systems in accordance with the engine speed and load.

DTC No.	DTC Detection Condition	Trouble Area
P0201	Received diagnostic information (open circuit detected / GND short / +B short or overheating) from the fuel injector IC continuously 10 times or more (No. 1 cylinder). (1 trip detection logic)	Open or short in fuel injector (for port injection) circuit (No. 1 cylinder) INJ fuse Fuel injector assembly (for port injection) (No. 1 cylinder) ECM
P0202	Received diagnostic information (open circuit detected / GND short / +B short or overheating) from the fuel injector IC continuously 10 times or more (No. 2 cylinder). (1 trip detection logic)	Open or short in fuel injector (for port injection) circuit (No. 2 cylinder) INJ fuse Fuel injector assembly (for port injection) (No. 2 cylinder) ECM
P0203	Received diagnostic information (open circuit detected / GND short / +B short or overheating) from the fuel injector IC continuously 10 times or more (No. 3 cylinder). (1 trip detection logic)	Open or short in fuel injector (for port injection) circuit (No. 3 cylinder) INJ fuse Fuel injector assembly (for port injection) (No. 3 cylinder) ECM
P0204	Received diagnostic information (open circuit detected / GND short / +B short or overheating) from the fuel injector IC continuously 10 times or more (No. 4 cylinder). (1 trip detection logic)	Open or short in fuel injector (for port injection) circuit (No. 4 cylinder) INJ fuse Fuel injector assembly (for port injection) (No. 4 cylinder) ECM

MONITOR DESCRIPTION

The ECM monitors the injection control of the port injector. If a malfunction is detected in the port injector circuit, the ECM cancels the injection control for the corresponding cylinder and turns on the MIL.

CONFIRMATION DRIVING PATTERN

Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Clear DTCs (even if no DTCs are stored, perform the clear DTC operation) Click here.
Turn the ignition switch off and wait for at least 30 seconds.
Turn the ignition switch to ON and turn the GTS on.
Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher.
With the vehicle stationary, depress the accelerator pedal and maintain an engine speed of between 2500 and 3000 rpm for 40 seconds or more [A].
Drive the vehicle at 10 km/h (6.25 mph) or more for 1 minute or more [B].

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.
Enter the following menus: Powertrain / Engine / Trouble Codes.
Read pending DTCs.
Tech Tips
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
Enter the following menus: Powertrain / Engine / Utility / All Readiness.
Input the DTC: P0201, P0202, P0203 or P0204.

Check the DTC judgment result.

GTS Display	Description
NORMAL	DTC judgment completed System normal
ABNORMAL	DTC judgment completed System abnormal
INCOMPLETE	DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions
N/A	Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

Tech Tips

If the judgment result shows NORMAL, the system is normal.
If the judgment result shows ABNORMAL, the system has a malfunction.

If the test result is INCOMPLETE or N/A and no DTC is output, perform a universal trip and check for permanent DTCs Click here.
Tech Tips
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

Tech Tips

If DTC P0201 is output, check the No. 1 fuel injector assembly (for port injection) (No. 1 cylinder) circuit.
If DTC P0202 is output, check the No. 2 fuel injector assembly (for port injection) (No. 2 cylinder) circuit.
If DTC P0203 is output, check the No. 3 fuel injector assembly (for port injection) (No. 3 cylinder) circuit.
If DTC P0204 is output, check the No. 4 fuel injector assembly (for port injection) (No. 4 cylinder) circuit.
Read freeze frame data using the GTS. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE

CHECK ANY OTHER DTCS OUTPUT

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine / Trouble Codes.

Read the DTCs.

Result

Result	Proceed to
P0201, P0202, P0203 and P0204 are output	A
P0201, P0202, P0203 or P0204 is output	B
P0201, P0202, P0203 or P0204 and other DTCs are output	C

B

INSPECT RELAY (EFI MAIN1) Click here

C

GO TO DTC CHART Click here

A

CHECK FUEL INJECTOR ASSEMBLY (POWER SOURCE VOLTAGE)

Text in Illustration
*a	Front view of wire harness connector (to Fuel Injector Assembly)
*b	No. 1 cylinder
*c	No. 2 cylinder
*d	No. 3 cylinder
*e	No. 4 cylinder

Disconnect the fuel injector assembly (for port injection) connector.

Turn the ignition switch to ON.

Measure the voltage according to the value(s) in the table below.

Standard Voltage

Tester Connection	Condition	Specified Condition
C8-1 - Body ground	Ignition switch ON	11 to 14 V
C30-1 - Body ground	Ignition switch ON	11 to 14 V
C9-1 - Body ground	Ignition switch ON	11 to 14 V
C31-1 - Body ground	Ignition switch ON	11 to 14 V

NG

INSPECT RELAY (EFI MAIN1) Click here

OK

CHECK HARNESS AND CONNECTOR (ECM - FUEL INJECTOR ASSEMBLY (FOR PORT INJECTION))

Disconnect the ECM connector.
Disconnect the fuel injector assembly (for port injection) connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance (Check for open)

Tester Connection	Condition	Specified Condition
A36-12 (#10) - C8-2	Always	Below 1 Ω
A36-22 (#20) - C30-2	Always	Below 1 Ω
A36-32 (#30) - C9-2	Always	Below 1 Ω
A36-13 (#40) - C31-2	Always	Below 1 Ω

Standard Resistance (Check for short)

Tester Connection	Condition	Specified Condition
A36-12 (#10) or C8-2 - Body ground	Always	10 kΩ or higher
A36-22 (#20) or C30-2 - Body ground	Always	10 kΩ or higher
A36-32 (#30) or C9-2 - Body ground	Always	10 kΩ or higher
A36-13 (#40) or C31-2 - Body ground	Always	10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

INSPECT FUEL INJECTOR ASSEMBLY (FOR PORT INJECTION)
1. Inspect the fuel injector assembly (for port injection) Click here.
OK
REPLACE ECM Click here

NG
REPLACE FUEL INJECTOR ASSEMBLY (FOR PORT INJECTION) Click here
INSPECT RELAY (EFI MAIN1)
1. Inspect the EFI MAIN1 relay Click here.
NG
REPLACE RELAY (EFI MAIN1)

OK

CHECK HARNESS AND CONNECTOR (EFI MAIN1 RELAY - FUEL INJECTOR ASSEMBLY)

Disconnect the fuel injector assembly (for port injection) connector.
Remove the EFI MAIN1 relay from the engine room relay block assembly.