Система Управления Двигателем 1Ad-Ftv. Dtc P0200 Injector Circuit / Open

The EDU drives the injectors at high speeds. The EDU delivers high-speed drive signals under high-pressure fuel conditions using the DC/DC converter, which provides a high-voltage and quick-charging system.
Soon after the EDU receives an injection command (#) 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.

COROLLA, AURIS. ZZE150 ZRE151,152 NDE150.Система Управления Двигателем 1Ad-Ftv.Система Ecd.
Dtc
P0200 Injector Circuit / Open

DTC No.	DTC Detection Condition	Trouble Area
P0200	Open or short in EDU or injector circuit After engine is started, there is no INJF signal from EDU to ECM, despite ECM sending # signals to EDU (1-trip detection logic)	Open or short in EDU circuit Injector EDU ECM

УКАЗАНИЕ:

DTC P0200 is detected when starting the engine and letting it idle for 30 seconds.

MONITOR DESCRIPTION

P0200 (Open or short in EDU or injector circuit):
The ECM continuously monitors both injection command (#) signals and injection confirmation (INJF) signals. This DTC will be set if the ECM determines that the number of # signals and INJF signals are inconsistent.
The 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. When the injector 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.
P0200 refers to a malfunction in the EDU or injector circuit.
If this DTC is set, 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.

MONITOR STRATEGY

Required sensors	INJF signal from EDU
Frequency of operation	Continuous
Duration	10 seconds
MIL operation	1 driving cycle

TYPICAL ENABLING CONDITIONS

Item	Specification
Item	Minimum	Maximum
Engine speed	500 rpm	-
Battery voltage	11 V	-
Ignition switch	on (IG)	on (IG)

TYPICAL MALFUNCTION THRESHOLDS

Threshold

The injection missing counter* for all the cylinders, or for one individual cylinder, reaches a specified number (taking approximately 1 second after starting the engine)
*: Increments when no INJF signal is received from the EDU despite the ECM sending # signals

WIRING DIAGRAM

INSPECTION PROCEDURE

ПРИМЕЧАНИЕ:

After replacing the ECM, the new ECM needs registration (See page Нажмите здесь) and initialization (See page Нажмите здесь).
After replacing an injector, the ECM needs registration (See page Нажмите здесь).

УКАЗАНИЕ:

Read freeze frame data using the intelligent tester. 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, and other data from the time the malfunction occurred.

1.INSPECT INJECTOR ASSEMBLY

Disconnect the injector connectors.

Measure the resistance according to the value(s) in the table below.
Standard resistance:
Tester Connection
Condition
Specified Condition
1 - 2
20°C (68°F)
0.85 to 1.05 Ω

Reconnect the injector connectors.

REPLACE INJECTOR ASSEMBLY (Нажмите здесь)

OK

2.CHECK HARNESS AND CONNECTOR (INJECTOR - EDU)

Disconnect the injector connectors.

Disconnect the EDU connector.

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

Standard resistance (Check for open):

Tester Connection	Condition	Specified Condition
B9-1 - B48-4 (INJ1)	Always	Below 1 Ω
B11-1 - B48-2 (INJ2)	Always	Below 1 Ω
B10-1 - B48-1 (INJ3)	Always	Below 1 Ω
B12-1 - B48-3 (INJ4)	Always	Below 1 Ω
B9-2 - B48-5 (COM1)	Always	Below 1 Ω
B10-2 - B48-6 (COM2)	Always	Below 1 Ω
B11-2 - B48-6 (COM2)	Always	Below 1 Ω
B12-2 - B48-5 (COM1)	Always	Below 1 Ω

Standard resistance (Check for short):

Tester Connection	Condition	Specified Condition
B9-1 or B48-4 (INJ1) - Body ground	Always	10 kΩ or higher
B11-1 or B48-2 (INJ2) - Body ground	Always	10 kΩ or higher
B10-1 or B48-1 (INJ3) - Body ground	Always	10 kΩ or higher
B12-1 or B48-3 (INJ4) - Body ground	Always	10 kΩ or higher
B9-2 or B48-5 (COM1) - Body ground	Always	10 kΩ or higher
B10-2 or B48-6 (COM2) - Body ground	Always	10 kΩ or higher
B11-2 or B48-6 (COM2) - Body ground	Always	10 kΩ or higher
B12-2 or B48-5 (COM1) - Body ground	Always	10 kΩ or higher

Reconnect the injector connectors.

Reconnect the EDU connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR (INJECTOR - EDU)

OK

3.CHECK HARNESS AND CONNECTOR (EDU - ECM)

Disconnect the EDU connector.

Disconnect the ECM connector.

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

Standard resistance (Check for open):

Tester Connection	Condition	Specified Condition
B49-6 (#10) - B31-50 (#1)	Always	Below 1 Ω
B49-3 (#20) - B31-49 (#2)	Always	Below 1 Ω
B49-2 (#30) - B31-48 (#3)	Always	Below 1 Ω
B49-5 (#40) - B31-47 (#4)	Always	Below 1 Ω
B49-7 (INJF) - B31-51 (INJF)	Always	Below 1 Ω

Standard resistance (Check for short):

Tester Connection	Condition	Specified Condition
B49-6 (#10) or B31-50 (#1) - Body ground	Always	10 kΩ or higher
B49-3 (#20) or B31-49 (#2) - Body ground	Always	10 kΩ or higher
B49-2 (#30) or B31-48 (#3) - Body ground	Always	10 kΩ or higher
B49-5 (#40) or B31-47 (#4) - Body ground	Always	10 kΩ or higher
B49-7 (INJF) or B31-51 (INJF) - Body ground	Always	10 kΩ or higher

Reconnect the EDU connector.

Reconnect the ECM connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR (EDU - ECM)

OK

4.CHECK TERMINAL VOLTAGE EDU POWER SOURCE

Disconnect the EDU connectors.

Turn the ignition switch on (IG).

Measure the voltage according to the value(s) in the table below.
Standard voltage:
Tester Connection
Switch Condition
Specified Condition
B48-8 (+B) - B49-1 (GND)
Ignition switch on (IG)
11 to 14 V

Reconnect the EDU connectors.

Перейдите к шагу 7

OK

5.REPLACE EDU

Replace the EDU (See page Нажмите здесь).

NEXT

6.CHECK WHETHER DTC OUTPUT RECURS

Connect the intelligent tester to the DLC3.

Turn the ignition switch on (IG) and turn the tester on.

Clear the DTCs (See page Нажмите здесь).

Start the engine and drive the vehicle for approximately 15 minutes.

Enter the following menus: Powertrain / Engine and ECT / DTC.

Read the DTCs.

Result:

Result
Proceed to
DTC P0200 is output
A
DTC is not output
B

SYSTEM IS OK

REPLACE ECM (Нажмите здесь)

7.CHECK HARNESS AND CONNECTOR (EDU - BODY GROUND)

Disconnect the EDU connector.

Measure the resistance according to the value(s) in the table below.
Standard resistance:
Tester Connection
Condition
Specified Condition
B49-1 (GND) - Body ground
Always
Below 1 Ω

Reconnect the EDU connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR (EDU - BODY GROUND)

OK

8.CHECK FUSE (EDU FUSE)

Remove the EDU fuse from the engine room relay block.

Measure the resistance according to the value(s) in the table below.
Standard resistance:
Tester Connection
Condition
Specified Condition
EDU fuse
Always
Below 1 Ω

Reinstall the EDU fuse.

REPLACE FUSE (EDU FUSE)

OK

9.INSPECT INTEGRATION RELAY (EDU RELAY)

Remove the integration relay from the engine room relay block.

Disconnect the integration relay connector.

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

Standard resistance:

Tester Connection	Condition	Specified Condition
1E-1 - 1B-8	Battery voltage is not applied between terminals 1B-6 and 1B-7	10 kΩ or higher
1E-1 - 1B-8	Battery voltage is applied between terminals 1B-6 and 1B-7	Below 1 Ω

Reconnect the integration relay connector.

Reinstall the integration relay.

REPLACE INTEGRATION RELAY

OK

10.INSPECT ECM (IREL VOLTAGE)

Disconnect the ECM connector.

Turn the ignition switch on (IG).

Measure the voltage according to the value(s) in the table below.
Standard voltage:
Tester Connection
Switch Condition
Specified Condition
A50-44 (IREL) - Body ground
Ignition switch on (IG)
11 to 14 V

Reconnect the ECM connector.

Перейдите к шагу 12

OK

11.CHECK HARNESS AND CONNECTOR (EDU - EDU RELAY)

Disconnect the EDU connector.

Remove the integration relay from the engine room relay block.

Disconnect the integration relay connector.

Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for open):
Tester Connection
Condition
Specified Condition
B48-8 (+B) - 1B-8
Always
Below 1 Ω
Standard resistance (Check for short):
Tester Connection
Condition
Specified Condition
B48-8 (+B) or 1B-8 - Body ground
Always
10 kΩ or higher

Reconnect the EDU connector.

Reconnect the integration relay connector.

Reinstall the integration relay.

REPAIR OR REPLACE HARNESS OR CONNECTOR (EDU - EDU RELAY)

REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - EDU RELAY)

12.CHECK FUSE (EFI NO. 1 FUSE)

Remove the EFI No. 1 fuse from the engine room relay block.

Measure the resistance according to the value(s) in the table below.
Standard resistance:
Tester Connection
Condition
Specified Condition
EFI No. 1 fuse
Always
Below 1 Ω

Reinstall the EFI No. 1 fuse.

REPLACE FUSE (EFI NO. 1 FUSE)

OK

13.CHECK HARNESS AND CONNECTOR (ECM - EDU RELAY)

Disconnect the ECM connector.

Remove the integration relay from the engine room relay block.

Disconnect the integration relay connector.

Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for open):
Tester Connection
Condition
Specified Condition
1B-7 - A50-44 (IREL)
Always
Below 1 Ω
Standard resistance (Check for short):
Tester Connection
Condition
Specified Condition
1B-7 or A50-44 (IREL) - Body ground
Always
10 kΩ or higher

Reconnect the ECM connector.

Reconnect the integration relay connector.

Reinstall the integration relay.

REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - EDU RELAY)

REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - EDU RELAY)

Tester Connection	Switch Condition	Specified Condition
B48-8 (+B) - B49-1 (GND)	Ignition switch on (IG)	11 to 14 V

Result	Proceed to
DTC P0200 is output	A
DTC is not output	B

Dtc P0200 Injector Circuit / Open. Corolla Auris

DTC P0200 Injector Circuit / Open

DESCRIPTION

MONITOR DESCRIPTION

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

WIRING DIAGRAM

INSPECTION PROCEDURE