Система Управления Двигателем 5L-E. Dtc 18 (5) Spill Control Circuit Malfunction

DTC 18 (5) Spill Control Circuit Malfunction

DESCRIPTION

The ECM operates the spill control valve to control the fuel injection volume. The spill control valve is mounted on the injection pump. The spill control valve's solenoid valve opens and closes the injection pressure release port. During fuel injection, the spill control valve is on (closed). The ECM determines the basic fuel injection amount based on the engine speed and accelerator pedal position. Then the ECM uses several other correctional factors to determine the final fuel injection amount. After fuel injection has begun, the ECM ensures the final fuel injection amount by performing the following: 1) by counting the number of NE signals, and 2) by turning the spill control valve from on (closed) to off (open) (injection pressure release port is open).

.Система Управления Двигателем 5L-E.Система Ecd.
Dtc
18 (5) Spill Control Circuit Malfunction

DTC No.	DTC Detection Condition	Trouble Area
18 (5)	Open or short in the spill control valve circuit at 500 rpm or more.	Open or short in spill control valve circuit Spill control valve ECM

WIRING DIAGRAM

INSPECTION PROCEDURE

1.INSPECT SPILL CONTROL VALVE

Inspect the spill control valve (See page Нажмите здесь).

REPLACE INJECTION PUMP ASSEMBLY (Нажмите здесь)

OK

2.CHECK ECM (SPV+ VOLTAGE)

Disconnect the spill control valve connector.

Turn the ignition switch to ON.

Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
Switch Condition
Specified Condition
C101-12 (SPV+) - C101-14 (E1)
Ignition switch ON
11 to 14 V
Text in Illustration
*a
Component with harness connected
(ECM)

Text in Illustration
*a	Component with harness connected (ECM)

Reconnect the spill control valve connector.

REPLACE ECM (Нажмите здесь)

OK

3.CHECK ECM (SPV- VOLTAGE)

Turn the ignition switch to ON.

Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
Switch Condition
Specified Condition
C101-25 (SPV-) - C101-14 (E1)
Ignition switch ON
11 to 14 V

While idling, check the waveform with an oscilloscope connected between the specified terminals of the ECM connector.
OK:
Tester Connection
Condition
Specified Condition
C101-25 (SPV-) - C101-14 (E1)
Idling
Correct waveform is as shown
Text in Illustration
*a
Component with harness connected
(ECM)
*b
SPV- signal waveform

Text in Illustration
*a	Component with harness connected (ECM)
*b	SPV- signal waveform

Перейдите к шагу 4

CHECK FOR INTERMITTENT PROBLEMS (Нажмите здесь)

4.CHECK HARNESS AND CONNECTOR (ECM - SPILL CONTROL VALVE)

Disconnect the spill control valve 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
C106-2 - C101-12 (SPV+)
Always
Below 1 Ω
C106-1 - C101-25 (SPV-)
Always
Below 1 Ω
Standard Resistance (Check for Short):
Tester Connection
Condition
Specified Condition
C106-2 or C101-12 (SPV+) - Body ground
Always
10 kΩ or higher
C106-1 or C101-25 (SPV-) - Body ground
Always
10 kΩ or higher

Reconnect the spill control valve connector.

Reconnect the ECM connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE ECM (Нажмите здесь)

Tester Connection	Switch Condition	Specified Condition
C101-12 (SPV+) - C101-14 (E1)	Ignition switch ON	11 to 14 V

Tester Connection	Condition	Specified Condition
C101-25 (SPV-) - C101-14 (E1)	Idling	Correct waveform is as shown

Tester Connection	Condition	Specified Condition
C106-2 or C101-12 (SPV+) - Body ground	Always	10 kΩ or higher
C106-1 or C101-25 (SPV-) - Body ground	Always	10 kΩ or higher