ECD SYSTEM(w/o DPF), Diagnostic DTC:P062D, P062E

DTC Code	DTC Name
P062D	Fuel Injector Driver Circuit Performance Bank1
P062E	Fuel Injector Driver Circuit Performance Bank2

DESCRIPTION

The EDU delivers drive signals to fuel injectors using the DC/DC converter, which provides a high-voltage and quick-charging system.

Soon after the EDU receives a fuel injection command (#1 to #8) signal from the ECM, the EDU responds to the command with an injector injection confirmation (INJF) signal when the current is applied to the injector assembly.

P062D
DTC Detection Drive Pattern	DTC Detection Condition	Trouble Area
Idling for 10 seconds	Open or short in the No. 1 injector driver (EDU) or injector assembly circuit (1 trip detection logic).	Open or short in No. 1 injector driver (EDU) circuit Injector assembly No. 1 EDU ECM

P062E
DTC Detection Drive Pattern	DTC Detection Condition	Trouble Area
Idling for 10 seconds	Open or short in the No. 2 injector driver (EDU) or injector assembly circuit (1 trip detection logic).	Open or short in No. 2 injector driver (EDU) circuit Injector assembly No. 2 EDU ECM

MONITOR DESCRIPTION

P062D, P062E (Open or short in EDU or injector assembly circuit):
The ECM continuously monitors both injection command (#1 to #8) signals and injection confirmation (INJF) signals. This DTC will be stored if the ECM determines that the number of #1 to #8 signals and INJF signals are inconsistent.

The fuel injectors are grounded over a Field Effect Transistor (FET) and a serial resistor. This resistor creates a voltage drop, which is monitored by the EDU (injector drive circuit) in relation to the current drawn by the injector assembly. When the injector assembly current becomes too high, the voltage drop over the resistor exceeds a specified level and no INJF signal for that cylinder is sent to the ECM.

After the engine is started, when there is no injection confirmation (INJF) signal from the No. 1 or No. 2 EDU to the ECM even though the ECM sends injection command (#1 to #8) signals to the No. 1 or No. 2 EDU, DTC P062D or DTC P062E is stored.

If this DTC is stored, the ECM enters fail-safe mode and limits engine power or stops the engine. The fail-safe mode continues until the ignition switch is turned off.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

Note

After replacing the ECM, the new ECM needs registration (See page ) and initialization Click here.
After replacing a fuel injector, the ECM needs registration Click here.

Tech Tips

Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.

PROCEDURE

CHECK TERMINAL VOLTAGE EDU POWER SOURCE

Disconnect the No. 1 injector driver (EDU) connectors.
Disconnect the No. 2 injector driver (EDU) connectors.

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

Standard Voltage

No. 1
Tester Connection	Switch Condition	Specified Condition
C74-8 (+B) - C73-1 (GND)	Ignition switch ON	11 to 14 V

No. 2
Tester Connection	Switch Condition	Specified Condition
C76-8 (+B) - C75-1 (GND)	Ignition switch ON	11 to 14 V

GO TO INJECTOR CIRCUIT Click here

CHECK HARNESS AND CONNECTOR (INJECTOR ASSEMBLY - EDU)

Disconnect the injector assembly connectors.
Disconnect the No. 1 EDU connector.

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

Standard Resistance

No. 1
Tester Connection	Condition	Specified Condition
C5-2 - C74-4 (INJ1)	Always	Below 1 Ω
C14-2 - C74-3 (INJ4)	Always	Below 1 Ω
C69-2 - C74-2 (INJ6)	Always	Below 1 Ω
C68-2 - C74-1 (INJ7)	Always	Below 1 Ω
C5-1 - C74-5 (COM1)	Always	Below 1 Ω
C14-1 - C74-5 (COM1)	Always	Below 1 Ω
C69-1 - C74-6 (COM2)	Always	Below 1 Ω
C68-1 - C74-6 (COM2)	Always	Below 1 Ω
C5-2 or C74-4 (INJ1) - Body ground	Always	10 kΩ or higher
C14-2 or C74-3 (INJ4) - Body ground	Always	10 kΩ or higher
C69-2 or C74-2 (INJ6) - Body ground	Always	10 kΩ or higher
C68-2 or C74-1 (INJ7) - Body ground	Always	10 kΩ or higher
C5-1 or C74-5 (COM1) - Body ground	Always	10 kΩ or higher
C14-1 or C74-5 (COM1) - Body ground	Always	10 kΩ or higher
C69-1 or C74-6 (COM2) - Body ground	Always	10 kΩ or higher
C68-1 or C74-6 (COM2) - Body ground	Always	10 kΩ or higher

Disconnect the injector assembly connectors.
Disconnect the No. 2 EDU connector.

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

Standard Resistance

No. 2
Tester Connection	Condition	Specified Condition
C70-2 - C76-4 (INJ2)	Always	Below 1 Ω
C9-2 - C76-3 (INJ5)	Always	Below 1 Ω
C67-2 - C76-1 (INJ3)	Always	Below 1 Ω
C54-2 - C76-2 (INJ8)	Always	Below 1 Ω
C70-1 - C76-5 (COM4)	Always	Below 1 Ω
C9-1 - C76-5 (COM4)	Always	Below 1 Ω
C67-1 - C76-6 (COM5)	Always	Below 1 Ω
C54-1 - C76-6 (COM5)	Always	Below 1 Ω
C70-2 or C76-4 (INJ2) - Body ground	Always	10 kΩ or higher
C9-2 or C76-3 (INJ5) - Body ground	Always	10 kΩ or higher
C67-2 or C76-1 (INJ3) - Body ground	Always	10 kΩ or higher
C54-2 or C76-2 (INJ8) - Body ground	Always	10 kΩ or higher
C70-1 or C76-5 (COM4) - Body ground	Always	10 kΩ or higher
C9-1 or C76-5 (COM4) - Body ground	Always	10 kΩ or higher
C67-1 or C76-6 (COM5) - Body ground	Always	10 kΩ or higher
C54-1 or C76-6 (COM5) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

CHECK HARNESS AND CONNECTOR (EDU - ECM)

Disconnect the No. 1 EDU connector.
Disconnect the ECM connector.

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

Standard Resistance

No. 1 (for LHD)
Tester Connection	Condition	Specified Condition
C73-6 (#10) - C45-40 (#1)	Always	Below 1 Ω
C73-5 (#40) - C45-37 (#4)	Always	Below 1 Ω
C73-3 (#60) - C45-35 (#6)	Always	Below 1 Ω
C73-2 (#70) - C45-34 (#7)	Always	Below 1 Ω
C73-7 (INJF) - C45-60 (INJ1)	Always	Below 1 Ω
C73-6 (#10) or C45-40 (#1) - Body ground	Always	10 kΩ or higher
C73-5 (#40) or C45-37 (#4) - Body ground	Always	10 kΩ or higher
C73-3 (#60) or C45-35 (#6) - Body ground	Always	10 kΩ or higher
C73-2 (#70) or C45-34 (#7) - Body ground	Always	10 kΩ or higher
C73-7 (INJF) or C45-60 (INJ1) - Body ground	Always	10 kΩ or higher

No. 1 (for RHD)
Tester Connection	Condition	Specified Condition
C73-6 (#10) - C46-40 (#1)	Always	Below 1 Ω
C73-5 (#40) - C46-37 (#4)	Always	Below 1 Ω
C73-3 (#60) - C46-35 (#6)	Always	Below 1 Ω
C73-2 (#70) - C46-34 (#7)	Always	Below 1 Ω
C73-7 (INJF) - C46-60 (INJ1)	Always	Below 1 Ω
C73-6 (#10) or C46-40 (#1) - Body ground	Always	10 kΩ or higher
C73-5 (#40) or C46-37 (#4) - Body ground	Always	10 kΩ or higher
C73-3 (#60) or C46-35 (#6) - Body ground	Always	10 kΩ or higher
C73-2 (#70) or C46-34 (#7) - Body ground	Always	10 kΩ or higher
C73-7 (INJF) or C46-60 (INJ1) - Body ground	Always	10 kΩ or higher

Disconnect the No. 2 EDU connector.
Disconnect the ECM connector.

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

Standard Resistance

No. 2 (for LHD)
Tester Connection	Condition	Specified Condition
C75-6 (#20) - C45-39 (#2)	Always	Below 1 Ω
C75-2 (#30) - C45-38 (#3)	Always	Below 1 Ω
C75-5 (#50) - C45-36 (#5)	Always	Below 1 Ω
C75-3 (#80) - C45-33 (#8)	Always	Below 1 Ω
C75-7 (INF2) - C45-61 (INJ2)	Always	Below 1 Ω
C75-6 (#20) or C45-39 (#2) - Body ground	Always	10 kΩ or higher
C75-2 (#30) or C45-38 (#3) - Body ground	Always	10 kΩ or higher
C75-5 (#50) or C45-36 (#5) - Body ground	Always	10 kΩ or higher
C75-3 (#80) or C45-33 (#8) - Body ground	Always	10 kΩ or higher
C75-7 (INF2) or C45-61 (INJ2) - Body ground	Always	10 kΩ or higher

No. 2 (for RHD)
Tester Connection	Condition	Specified Condition
C75-6 (#20) - C46-39 (#2)	Always	Below 1 Ω
C75-2 (#30) - C46-38 (#3)	Always	Below 1 Ω
C75-5 (#50) - C46-36 (#5)	Always	Below 1 Ω
C75-3 (#80) - C46-33 (#8)	Always	Below 1 Ω
C75-7 (INF2) - C46-61 (INJ2)	Always	Below 1 Ω
C75-6 (#20) or C46-39 (#2) - Body ground	Always	10 kΩ or higher
C75-2 (#30) or C46-38 (#3) - Body ground	Always	10 kΩ or higher
C75-5 (#50) or C46-36 (#5) - Body ground	Always	10 kΩ or higher
C75-3 (#80) or C46-33 (#8) - Body ground	Always	10 kΩ or higher
C75-7 (INF2) or C46-60 (INJ2) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

INSPECT INJECTOR ASSEMBLY (RESISTANCE)
1. Inspect the injector assembly Click here.
NG
REPLACE INJECTOR ASSEMBLY Click here

OK

INSPECT INJECTOR DRIVER (No. 1 and No. 2)

Interchange the No. 1 and No. 2 EDU connectors.
Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Clear the DTCs Click here.

Note

Before clearing the DTCs, write them down.
Start the engine.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

Read the DTCs.

Result
Result	Proceed to
DTCs do not change	A
DTCs change (change in malfunctioning cylinder or EDU code)	B

REPLACE INJECTOR DRIVER (No. 1 or No. 2) Click here

REPLACE ECM
1. Replace the ECM Click here.
NEXT
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here
GO TO INJECTOR CIRCUIT
1. Go to the injector circuit Click here.
NEXT
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here
REPLACE INJECTOR DRIVER (No. 1 or No. 2)
1. Replace the injector driver (No. 1 or No. 2) Click here.
NEXT
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here
REPLACE INJECTOR ASSEMBLY
1. Replace the injector assembly Click here.
NEXT
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here
REPAIR OR REPLACE HARNESS OR CONNECTOR

NEXT
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED
1. Connect the GTS to the DLC3.
2. Clear the DTCs Click here.
3. Turn the ignition switch off.
4. Start the engine and idle it for 10 seconds.
5. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
6. Confirm that the DTC is not output again.
NEXT
END