P1229
DTC Detection Drive Pattern	DTC Detection Condition	Trouble Area
Idling for 60 seconds	The actual fuel pressure exceeds the target fuel pressure by 40 MPa or more for 10 seconds (1 trip detection logic).	Short in fuel supply pump (suction control valve) circuit Fuel supply pump (suction control valve) Fuel pressure sensor (common rail (for Bank 1)) ECM

Related Data List
DTC No.	Data List
P1229	Fuel Press Target Common Rail Pressure Injection Pressure Correction Target Pump SCV Current

HINT:

For more information on the fuel supply pump (suction control valve) and common rail system, refer to the System Description ().

When DTC P1229 is stored, check the internal fuel pressure of the common rail by entering the following menus: Powertrain / Engine / Data List / Fuel Press, Target Common Rail Pressure.
Under a stable condition such as idling or running the engine at 2500 rpm without load, Fuel Press is within +/-5 MPa of Target Common Rail Pressure.

When there is an operating problem with the fuel supply pump (when Fuel Press is more than Target Common Rail Pressure due to a problem with the closing of the suction valve), the values of Injection Pressure Correction and Target Pump SCV Current decrease.

MONITOR DESCRIPTION

P1229 (Fuel over-feed):

The ECM stores this DTC if the actual fuel pressure inside the common rail remains higher than the target fuel pressure, despite the ECM closing the suction control valve. This DTC indicates that the suction control valve may be stuck open, or there may be a short in its circuit.

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

WIRING DIAGRAM

Dtc P1229 Fuel Pump System. 1VD-FTV ENGINE CONTROL. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

INSPECTION PROCEDURE

NOTICE:

After replacing the ECM, the new ECM needs registration () and initialization ().

After replacing the fuel supply pump, the ECM needs initialization ().

HINT:

Read freeze frame data using the intelligent tester. 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.

1.INSPECT FUEL SUPPLY PUMP (SUCTION CONTROL VALVE)

Disconnect the suction control valve connector and then check if the engine starts.

OK:
Engine does not start.

Go to step 6

OK

2.READ VALUE USING INTELLIGENT TESTER (TARGET PUMP SCV CURRENT)

Connect the intelligent tester to the DLC3.

Start the engine.

Turn the tester on.

Enter the following menus: Powertrain / Engine / Data List / Target Pump SCV Current.

Read the value.

OK:
Engine Speed Target Pump SCV Current
Idling 923 to 1123 mA
2500 rpm (No engine load) 1013 to 1212 mA

Go to step 4

OK

3.READ VALUE USING INTELLIGENT TESTER (FUEL PRESS)

Connect the intelligent tester to the DLC3.

Start the engine and turn the tester on.

Enter the following menus: Powertrain / Engine / Data List / Fuel Press.

Check that the internal fuel pressure of the common rail is within the specification below.

OK:
Fuel Press is within +/-5 MPa of Target Common Rail Pressure when engine is idling and running at 2500 rpm without load.

Go to step 5

Go to step 4

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

Dtc P1229 Fuel Pump System. 1VD-FTV ENGINE CONTROL. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Disconnect the suction control valve connector.

Disconnect the ECM connector.

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

Standard Resistance (Check for open):
for LHD
Tester Connection Condition Specified Condition
z64-2 (PCV) - C45-105 (PCV-) Always Below 1 Ω
z64-1 (+B) - C45-106 (PCV+) Always Below 1 Ω
for RHD
Tester Connection Condition Specified Condition
z64-2 (PCV) - C46-105 (PCV-) Always Below 1 Ω
z64-1 (+B) - C46-106 (PCV+) Always Below 1 Ω

for LHD
Tester Connection	Condition	Specified Condition
z64-2 (PCV) - C45-105 (PCV-)	Always	Below 1 Ω
z64-1 (+B) - C45-106 (PCV+)	Always	Below 1 Ω

for RHD
Tester Connection	Condition	Specified Condition
z64-2 (PCV) - C46-105 (PCV-)	Always	Below 1 Ω
z64-1 (+B) - C46-106 (PCV+)	Always	Below 1 Ω

Standard Resistance (Check for short):
for LHD
Tester Connection Condition Specified Condition
z64-2 (PCV) or C45-105 (PCV-) - Body ground Always 10 kΩ or higher
z64-1 (+B) or C45-106 (PCV+) - Body ground Always 10 kΩ or higher
for RHD
Tester Connection Condition Specified Condition
z64-2 (PCV) or C46-105 (PCV-) - Body ground Always 10 kΩ or higher
z64-1 (+B) or C46-106 (PCV+) - Body ground Always 10 kΩ or higher

for LHD
Tester Connection	Condition	Specified Condition
z64-2 (PCV) or C45-105 (PCV-) - Body ground	Always	10 kΩ or higher
z64-1 (+B) or C45-106 (PCV+) - Body ground	Always	10 kΩ or higher

for RHD
Tester Connection	Condition	Specified Condition
z64-2 (PCV) or C46-105 (PCV-) - Body ground	Always	10 kΩ or higher
z64-1 (+B) or C46-106 (PCV+) - Body ground	Always	10 kΩ or higher

Go to step 11

OK

5.CHECK WHETHER DTC OUTPUT RECURS

Clear DTCs ().

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON and turn the tester on.

Start the engine.

Idle the engine for 60 seconds.

Enter the following menus: Powertrain / Engine / DTC.

Read the DTCs.

Result
Result	Proceed to
P1229 is output	A
No DTC is output	B

END

A

6.REPLACE FUEL SUPPLY PUMP

Replace the fuel supply pump ().

NEXT

7.READ VALUE USING INTELLIGENT TESTER (FUEL PRESS)

Connect the intelligent tester to the DLC3.

Start the engine and turn the tester on.

Enter the following menus: Powertrain / Engine / Data List / Fuel Press.

Check that the internal fuel pressure of the common rail is within the specification below.

OK:
Fuel Press is within +/-5 MPa of Target Common Rail Pressure when engine is idling and running at 2500 rpm without load.

Go to step 10

OK

8.CHECK WHETHER DTC OUTPUT RECURS

Clear the DTCs ().

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON and turn the tester on.

Start the engine.

Idle the engine for 60 seconds.

Enter the following menus: Powertrain / Engine / DTC.

Read the DTCs.

Result
Result	Proceed to
P1229 is output	A
No DTC is output	B

END

A

9.REPLACE ECM

Replace the ECM ().

Go to step 12

10.REPLACE COMMON RAIL (for Bank 1) (FUEL PRESSURE SENSOR)

Replace common rail (for Bank 1) ().

Go to step 12

11.REPAIR OR REPLACE HARNESS OR CONNECTOR

NEXT

12.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

Connect the intelligent tester to the DLC3.

Clear the DTCs ().

Turn the ignition switch off.

Start the engine.

Idle the engine for 60 seconds.

Confirm that the DTC is not output again.

HINT:

Perform the following procedure using the tester to determine whether or not the DTC judgment has been carried out.

Enter the following menus: Powertrain / Engine / Utility / All Readiness.

Input DTC P1229.

Check that STATUS is NORMAL. If STATUS is INCOMPLETE or UNKNOWN, increase idling time.

END

1VD-FTV ENGINE CONTROL

Land Cruiser URJ200 URJ202 GRJ200 VDJ200

ECD SYSTEM w/o DPF

Engine Speed	Target Pump SCV Current
Idling	923 to 1123 mA
2500 rpm (No engine load)	1013 to 1212 mA