P0101
DTC Detection Drive Pattern	DTC Detection Condition	Trouble Area
After the engine is completely warmed up, perform the following procedure 3 times: from a vehicle speed of 60 km/h (37 mph), accelerate the vehicle to 80 km/h (50 mph), quickly release the accelerator pedal and do not depress it for 7 seconds or more. After performing the above procedure, immediately stop the vehicle and confirm that "Exhaust Temperature B1S2" and "Exhaust Temperature B2S2" display 300°C (572°F) or higher using the GTS.	After the engine is completely warmed up, while the accelerator pedal is released for 7 seconds or more and the vehicle is decelerating, the intake air volume is higher or lower than the threshold* (EGR valve fully closed and throttle valve is fully open). (2 trip detection logic)	Mass air flow meter Intake air temperature sensor (turbo) Manifold absolute pressure sensor No. 1 or No. 2 EGR valve assembly ECM Open or short in mass air flow meter circuit

*: There is a threshold for a low airflow rate malfunction and high airflow rate malfunction. The threshold is different depending on the values of "Engine Speed", "MAP" and "Intake Air Temp (Turbo)".

HINT:

Low airflow rate malfunction: For example, when the vehicle is decelerating, if "MAF" is 25 gm/sec or less, a low airflow malfunction is confirmed to be present (when "Engine Speed" is 1600 rpm, "MAP" is 110 kPa and "Intake Air Temp (Turbo)" is 35°C).

High airflow rate malfunction: For example, when the vehicle is decelerating, if "MAF" is 47 gm/sec or more, a high airflow malfunction is confirmed to be present (when "Engine Speed" is 1600 rpm, "MAP" is 110 kPa and "Intake Air Temp (Turbo)" is 35°C).

Related Data List
DTC No.	Data List
P0101	MAF MAP Engine Speed Intake Air Temp (Turbo) Target EGR Valve Pos Target EGR Valve Pos #2 Actual EGR Valve Pos Actual EGR Valve Pos #2 Exhaust Temperature B1S2 Exhaust Temperature B2S2

HINT:

If DTC P0101 is stored, either of the following symptoms may appear:

As the ECU mistakenly determines that there is less air than the actual intake air amount, EGR is decreased to match the target EGR.

Combustion noise worsens

As the ECU mistakenly determines that there is more air than the actual intake air amount, EGR is increased to match the target EGR:

Misfire

White smoke

Black smoke

INSPECTION PROCEDURE

NOTICE:

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

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

After replacing an injector assembly, the ECM needs registration ().

HINT:

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.

1.CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0101)

Connect the GTS to the DLC3.

Turn the engine switch on (IG) and turn the GTS on.

Enter the following menus: Engine and ECT / Trouble Codes.

Read the DTCs.

Result
Result	Proceed to
P0101 and other DTCs are output	A
P0101 is output	B

HINT:

If codes other than P0101 are output, perform troubleshooting for those DTCs first.

GO TO DTC CHART ()

B

2.CHECK FREEZE FRAME DATA (MASS AIR FLOW RATE AND ENGINE SPEED)

Connect the GTS to the DLC3.

Turn the engine switch on (IG).

Turn the GTS on.

Enter the following menus: Engine and ECT / Trouble Codes.

Check the freeze frame data.

Result
Result	Proceed to
Engine speed 1250 rpm or less MAF 356.0 gm/sec or more	A
Engine speed 1250 rpm or more MAF 1.00 gm/sec or less	A
Except above	B

Go to step 8

A

3.READ VALUE USING GTS (MASS AIR FLOW RATE AND ENGINE SPEED)

Connect the GTS to the DLC3.

Start the engine and turn the GTS on.

Enter the following menus: Engine and ECT / Data List / MAF and Engine speed.

Read the value.

Standard:
Engine speed MAF
0 rpm 0.5 gm/sec or less
550 to 650 rpm 100 gm/sec or less
3000 rpm 1 gm/sec or more

Go to step 13

OK

4.REPLACE MASS AIR FLOW METER

Replace the mass air flow meter ().

HINT:

If foreign matter is stuck inside the mass air flow meter, the output characteristics of the mass air flow meter may change, resulting in a malfunction.

NEXT

5.CHECK DTC OUTPUT

Connect the GTS to the DLC3.

Clear the DTCs ().

Turn the engine switch off for 30 seconds or more.

Start the engine.

After the engine is completely warmed up, perform the following procedure 3 times with the A/C off: from a vehicle speed of 60 km/h (37 mph), accelerate the vehicle to 80 km/h (50 mph), quickly release the accelerator pedal and do not depress it for 7 seconds or more.

Stop the vehicle immediately after completing the above procedure.

Connect the GTS to the DLC3.

Enter the following menus: Engine and ECT / Data List / Exhaust Temperature B1S2 and Exhaust Temperature B2S2.

HINT:

"Exhaust Temperature B1S2" and "Exhaust Temperature B2S2" must be 300°C or more.

If "Exhaust Temperature B1S2" and "Exhaust Temperature B2S2" are less than 300°C (572°F), perform the DTC detection drive pattern again, increasing the vehicle speed so that the exhaust gas temperature increases.

Enter the following menus: Engine and ECT / Trouble Codes.

Read the pending DTCs.

HINT:

If no pending DTCs are output, proceed to the next step to check "All Readiness".

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

Enter the following menus: Engine and ECT / Utility / All Readiness.

Input DTC P0101.

Check the DTC judgment result.

Result
GTS Display	Result	Proceed to
Pending DTC	P0101 is output	B
All Readiness	NORMAL	A
All Readiness	ABNORMAL	B

HINT:

If STATUS is INCOMPLETE or N/A, perform the following procedure again 3 times with the A/C off: from a vehicle speed of 60 km/h (37 mph), accelerate the vehicle to 80 km/h (50 mph), quickly release the accelerator pedal and do not depress it for 7 seconds or more.

END

B

6.CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM)

Disconnect the mass air flow meter connector.

Disconnect the ECM connector.

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

Standard Resistance:
for LHD
Tester Connection Condition Specified Condition
C50-1 (FG) - C45-71 (VG) Always Below 1 Ω
C50-2 (E2G) - C45-94 (EVG) Always Below 1 Ω
C50-1 (FG) or C45-71 (VG) - Body ground Always 10 kΩ or higher

for LHD
Tester Connection	Condition	Specified Condition
C50-1 (FG) - C45-71 (VG)	Always	Below 1 Ω
C50-2 (E2G) - C45-94 (EVG)	Always	Below 1 Ω
C50-1 (FG) or C45-71 (VG) - Body ground	Always	10 kΩ or higher

Standard Resistance:
for RHD
Tester Connection Condition Specified Condition
C50-1 (FG) - C46-71 (VG) Always Below 1 Ω
C50-2 (E2G) - C46-94 (EVG) Always Below 1 Ω
C50-1 (FG) or C46-71 (VG) - Body ground Always 10 kΩ or higher

for RHD
Tester Connection	Condition	Specified Condition
C50-1 (FG) - C46-71 (VG)	Always	Below 1 Ω
C50-2 (E2G) - C46-94 (EVG)	Always	Below 1 Ω
C50-1 (FG) or C46-71 (VG) - Body ground	Always	10 kΩ or higher

Reconnect the mass air flow meter connector.

Reconnect the ECM connector.

Go to step 25

OK

7.REPLACE ECM

Replace the ECM ().

Go to step 26

8.READ VALUE USING GTS (MASS AIR FLOW RATE AND ENGINE SPEED)

Connect the GTS to the DLC3.

Turn the engine switch on (IG) and turn the GTS on.

Enter the following menus: Engine and ECT / Data List / MAF and Engine speed.

Read the value.

Standard:
Engine speed MAF
0 rpm 0.5 gm/sec or less

Go to step 13

OK

9.READ VALUE USING GTS (MAP AND ATMOSPHERIC PRESSURE)

Connect the GTS to the DLC3.

Turn the engine switch on (IG) and turn the GTS on.

Enter the following menus: Engine and ECT / Data List / MAP and Atmospheric Pressure.

Compare the values when the engine switch is on (IG).

Standard:
Difference between "MAP" and "Atmosphere Pressure" is less than 8 kPa.

HINT:

If "MAP" and "Atmosphere Pressure" have the same value, both are normal. If there is a difference of 8 kPa or more, compare the values to the atmospheric pressure for that day. The sensor whose deviation is the greatest is malfunctioning.

Standard atmospheric pressure is 101 kPa. For every 100 m increase in altitude, pressure drops by 1 kPa. This varies by weather.

Go to step 23

OK

10.CHECK AIR INDUCTION SYSTEM

Check the air induction system for vacuum leakage ().

OK:
No leakage from air induction system.

HINT:

Check for abnormal disconnection, pipe and hose squashing, and any damage in the intake system.

Using your hand, check whether the pipes and hoses in the intake system are securely connected.

Air leaks from the intake system can be checked by applying soapy water and revving the engine.

Check for any modifications in the intake system made by the user.

Go to step 20

OK

11.READ VALUE USING GTS (INTAKE AIR AND INTAKE AIR TEMP (TURBO))

Connect the GTS to the DLC3.

Soak the engine for a long time.

Turn the engine switch on (IG) and turn the GTS on.

Enter the following menus: Engine and ECT / Data List / Intake Air and Intake Air Temp (Turbo).

OK:
Intake Air is the same as Intake Air Temp (Turbo).

Go to step 16

OK

12.INSPECT EGR VALVE ASSEMBLY

Connect the GTS to the DLC3.

Turn the engine switch on (IG) and turn the GTS on.

Enter the following menus: Engine and ECT / Active Test / Control the EGR Step Position or Control the EGR Step Position #2.

While continuously changing the Active Test value to 0, 30, 60, 90, 60, 30 and 0%, check that Actual EGR Valve Pos or Actual EGR Valve Pos #2 smoothly changes to the set opening lift amount.

OK:
Value smoothly changes to within +/- 10% of set opening lift amount.

HINT:

EGR valve closed: 0%.

EGR valve open: 95.2%.

Next, after the engine is warmed up, stop the engine and wait for 15 seconds. After that, start the engine again and idle it for 30 seconds. Then stop the engine and wait for 15 seconds. After starting the engine again, read the Data List values while idling.

Enter the following menus: Data List / EGR Close Lrn. Val. or EGR Close Lrn. Val. #2.

Read the values.

Standard:
3.5 to 4.5 V

Go to step 17

OK

13.CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM)

Disconnect the mass air flow meter connector.

Disconnect the ECM connector.

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

Standard Resistance:
for LHD
Tester Connection Condition Specified Condition
C50-1 (FG) - C45-71 (VG) Always Below 1 Ω
C50-2 (E2G) - C45-94 (EVG) Always Below 1 Ω
C50-1 (FG) or C45-71 (VG) - Body ground Always 10 kΩ or higher

Standard Resistance:
for RHD
Tester Connection Condition Specified Condition
C50-1 (FG) - C46-71 (VG) Always Below 1 Ω
C50-2 (E2G) - C46-94 (EVG) Always Below 1 Ω
C50-1 (FG) or C46-71 (VG) - Body ground Always 10 kΩ or higher

Reconnect the mass air flow meter connector.

Reconnect the ECM connector.

Go to step 25

OK

14.REPLACE MASS AIR FLOW METER

Replace the mass air flow meter ().

HINT:

If foreign matter is stuck inside the mass air flow meter, the output characteristics of the mass air flow meter may change, resulting in a malfunction.

NEXT

15.CHECK DTC OUTPUT

Connect the GTS to the DLC3.

Clear the DTCs ().

Turn the engine switch off for 30 seconds or more.

Start the engine.

Stop the vehicle immediately after completing the above procedure.

Connect the GTS to the DLC3.

Enter the following menus: Engine and ECT / Data List / Exhaust Temperature B1S2 and Exhaust Temperature B2S2.

HINT:

"Exhaust Temperature B1S2" and "Exhaust Temperature B2S2" must be 300°C or more.

Enter the following menus: Engine and ECT / Trouble Codes.

Read the pending DTCs.

HINT:

If no pending DTCs are output, proceed to the next step to check "All Readiness".

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

Enter the following menus: Engine and ECT / Utility / All Readiness.

Input DTC P0101.

Check the DTC judgment result.

Result
GTS Display	Result	Proceed to
Pending DTC	P0101 is output	B
All Readiness	NORMAL	A
All Readiness	ABNORMAL	B

HINT:

If STATUS is INCOMPLETE or N/A, perform the following procedure again 3 times with the A/C off: from a vehicle speed of 60 km/h (37 mph), accelerate the vehicle to 80 km/h (50 mph), quickly release the accelerator pedal and do not depress it for 7 seconds or more.

Go to step 22

END

16.INSPECT INTAKE AIR TEMPERATURE SENSOR (TURBO)

Inspect the intake air temperature sensor (turbo) ().

Go to step 18

Go to step 24

17.CHECK FOR DEPOSIT (EGR VALVE ASSEMBLY)

Remove the No. 1 and No. 2 EGR valve assembly ().

Visually check the EGR valve assembly for deposits.

Result:
If there are deposits, clean the EGR valve and EGR passage (intake/exhaust manifold, EGR cooler, EGR pipes, etc.).

NOTICE:

When cleaning the EGR valve assembly, make sure the valve is completely closed.

When cleaning the EGR valve assembly, perform initialization procedure ().

Do not forcibly open the valve, as it may be damaged or deformed.

When cleaning the EGR valve assembly, use a piece of cloth soaked with cleaning solvent. Spraying the solvent directly onto these parts or soaking the parts in the solvent may damage the parts.

Reinstall the EGR valve assembly ().

Go to step 21

OK

18.REPLACE MASS AIR FLOW METER

Replace the mass air flow meter ().

HINT:

If foreign matter is stuck inside the mass air flow meter, the output characteristics of the mass air flow meter may change, resulting in a malfunction.

NEXT

19.CHECK DTC OUTPUT

Connect the GTS to the DLC3.

Clear the DTCs ().

Turn the engine switch off for 30 seconds or more.

Start the engine.

Stop the vehicle immediately after completing the above procedure.

Connect the GTS to the DLC3.

Enter the following menus: Engine and ECT / Data List / Exhaust Temperature B1S2 and Exhaust Temperature B2S2.

HINT:

"Exhaust Temperature B1S2" and "Exhaust Temperature B2S2" must be 300°C or more.

Enter the following menus: Engine and ECT / Trouble Codes.

Read the pending DTCs.

HINT:

If no pending DTCs are output, proceed to the next step to check "All Readiness".

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

Enter the following menus: Engine and ECT / Utility / All Readiness.

Input DTC P0101.

Check the DTC judgment result.

Result
GTS Display	Result	Proceed to
Pending DTC	P0101 is output	B
All Readiness	NORMAL	A
All Readiness	ABNORMAL	B

HINT:

If STATUS is INCOMPLETE or N/A, perform the following procedure again 3 times with the A/C off: from a vehicle speed of 60 km/h (37 mph), accelerate the vehicle to 80 km/h (50 mph), quickly release the accelerator pedal and do not depress it for 7 seconds or more.

Go to step 22

END

20.REPAIR OR REPLACE AIR INDUCTION SYSTEM

Repair or replace the air induction system.

Go to step 26

21.REPLACE EGR VALVE ASSEMBLY

Replace the No. 1 or No. 2 EGR valve assembly ().

Go to step 26

22.REPLACE ECM

Replace the ECM ().

Go to step 26

23.REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR

Replace the manifold absolute pressure sensor.

Go to step 26

24.REPLACE INTAKE AIR TEMPERATURE SENSOR (TURBO)

Replace the intake air temperature sensor (turbo) ().

Go to step 26

25.REPAIR OR REPLACE HARNESS OR CONNECTOR

Repair or replace the harness or connector.

NEXT

26.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

Connect the GTS to the DLC3.

Clear the DTCs ().

Turn the engine switch off for 30 seconds or more.

Start the engine.

Stop the vehicle immediately after completing the above procedure.

Connect the GTS to the DLC3.

Enter the following menus: Engine and ECT / Data List / Exhaust Temperature B1S2 and Exhaust Temperature B2S2.

HINT:

"Exhaust Temperature B1S2" and "Exhaust Temperature B2S2" must be 300°C (572°F) or more.

If "Exhaust Temperature B1S2" and "Exhaust Temperature B2S2" is less than 300°C (572°F), perform the DTC detection drive pattern again, increasing the vehicle speed so that the exhaust gas temperature increases.

Enter the following menus: Engine and ECT / Trouble Codes.

Confirm that the pending DTC is not output again.

HINT:

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

Enter the following menus: Engine and ECT / Utility / All Readiness.

Input DTC P0101.

Check the DTC judgment result.

HINT:

If STATUS is INCOMPLETE or N/A, perform the following procedure again 3 times with the A/C off: from a vehicle speed of 60 km/h (37 mph), accelerate the vehicle to 80 km/h (50 mph), quickly release the accelerator pedal and do not depress it for 7 seconds or more.

END

1VD-FTV ENGINE CONTROL

Land Cruiser URJ200 URJ202 GRJ200 VDJ200

ECD SYSTEM w/ DPF

Engine speed	MAF
0 rpm	0.5 gm/sec or less
550 to 650 rpm	100 gm/sec or less
3000 rpm	1 gm/sec or more