Toyota FJ Cruiser (GSJ 10, 15 series). Manual - part 73

1GR-FE ENGINE CONTROL SYSTEM  –  SFI SYSTEM

ES–247

ES

1.

Key-off monitor sequence 1 to 8

1. Atmospheric pressure measurement

2. First reference pressure measurement

3. Vent valve stuck closed check

4. Vacuum introduction

5. Purge VSV stuck closed check

6. Second reference pressure measurement

7. Leak check 

8. Atmospheric pressure measurement

TYPICAL MALFUNCTION THRESHOLDS

P0455: EVAP gross leak

P0456: EVAP small leak

MONITOR RESULT

Refer to CHECKING MONITOR STATUS (See page 

ES-20

).

Leak detection pump

Not operated by scan tool

Both of following conditions met before key off

Conditions 1 and 2

1. Duration that vehicle driven

5 minutes or more

2. EVAP purge operation

Performed

ECT

4.4

° to 35°C (40° to 95°F)

IAT

4.4

°to 35°C (40° to 95°F)

Next sequence run if following condition set

-

Atmospheric pressure change

Less than 0.3 kPa-g (2.25 mmHg-g) in 1 second

Next sequence run if all of following conditions set

Condition 1, 2 and 3

1. EVAP pressure just after reference pressure measurement start

-1 kPa-g (-7.5 mmHg-g) or less

2. Reference pressure

-4.85 to -1.057 kPa-g (-36.4 to -7.93 mmHg-g)

3. Reference pressure

Saturated within 60 seconds

Next sequence run if following condition set

-

EVAP pressure change after vent valve ON (closed)

0.3 kPa-g (2.25 mmHg-g) or more

Next sequence run if following condition set

-

EVAP pressure

Saturated within 15 minutes

Next sequence run if following condition set

-

EVAP pressure change after purge VSV ON (open)

0.3 kPa-g (2.25 mmHg-g) or more

Next sequence run if all of following conditions set

Condition 1, 2, 3 and 4

1. EVAP pressure just after reference pressure

-1 kPa-g (-7.5 mmHg-g) or less

2. Reference pressure

-4.85 to -1.057 kPa-g (-36.4 to -7.93 mmHg-g)

3. Reference pressure

Saturated within 60 seconds

4. Reference pressure difference between first and second

Less than 0.7 kPa-g (5.25 mmHg-g)

Next sequence run if following condition set

-

EVAP pressure when vacuum introduction complete

Second reference pressure or less

EVAP monitor complete if following condition set

-

Atmospheric pressure difference between sequence 1 and 8

Within 0.3 kPa-g (2.25 mmHg-g)

EVAP pressure when vacuum introduction complete

Higher than reference pressure x 0.2

EVAP pressure when vacuum introduction complete

Between reference pressure and reference pressure x 0.2

ES–248

1GR-FE ENGINE CONTROL SYSTEM  –  SFI SYSTEM

ES

DESCRIPTION

Automatic Transmission Models:
Vehicles, which are equipped with ABS (Anti-lock Brake System), detect the vehicle speed using the skid 
control ECU and wheel speed sensor. The wheel speed sensor monitors the wheel rotation speed and 
sends a signal to the skid control ECU. The skid control ECU converts the wheel speed signal into a 4-
pulse signal and transmits it to the ECM via the combination meter. The ECM determines the vehicle 
speed based on the frequency of the pulse signal.

Manual Transmission Models:
Vehicles, which are equipped with manual transmission, detect the vehicle speed using the No. 1 vehicle 
speed sensor. The No. 1 vehicle speed sensor transmits a 4-pulse signal for every revolution of the rotor 
shaft, which is rotated by the transmission or transfer output shaft via the driven gear. The 4-pulse signal 
is converted into a more precise rectangular waveform by the waveform shaping circuit inside the 
combination meter. The signal is then transmitted to the ECM. The ECM determines the vehicle speed 
based on the frequency of the pulse signal.

DTC

P0500

Vehicle Speed Sensor "A"

From Wheel 
Speed Sensor

Skid Control ECU

Combination Meter

4-Pulse

4-Pulse

ECM

A115899E01

Combination Meter

4-Pulse

4-Pulse

ECM

No. 1 Vehicle 
Speed Sensor

A115900E01

1GR-FE ENGINE CONTROL SYSTEM  –  SFI SYSTEM

ES–249

ES

MONITOR DESCRIPTION

Automatic Transmission Models:
The ECM assumes that the vehicle is being driven, while the vehicle speed sensor signal is being 
transmitted by the combination meter. If there is no signal from the combination meter, despite the ECM 
detecting the speed signal from the speed sensor No. 2, the ECM interprets this as a malfunction in the 
speed signal circuit. The ECM then illuminates the MIL and sets a DTC.
Manual Transmission Models:
The ECM assumes that the vehicle is being driven, when the indicated engine speed is more than 1,500 
rpm and the engine load calculated by the ECM is more than certain level. If there is no signal from the 
vehicle speed sensor, despite these conditions being met, the ECM interprets this as a malfunction in the 
speed signal circuit. The ECM then illuminates the MIL and sets a DTC.

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

Automatic Transmission:

Manual Transmission:

DTC No.

DTC Detection Conditions

Trouble Areas

P0500

Automatic Transmission Models:
ECM detects following conditions simultaneously 500 times 
(1 trip detection logic)
•

No SP1 (speed sensor) signal while ECM detects SP2 
(No. 2 speed sensor) signal

•

Vehicle speed 6 mph (9 km/h) or more for 4 seconds

•

Park/Neutral position switch OFF (shift lever other than P 
and N positions)

•

Transfer lever in other than N position (4WD)

•

Open or short in speed signal circuit

•

Vehicle speed sensor

•

Combination meter

•

ECM

•

Skid control ECU

Manual Transmission Models:
Following conditions met for 5 seconds or more (2 trip 
detection logic):
•

Engine coolant temperature 70

°C (158°F) or more

•

Engine speed 1,500 to 4,000 rpm

•

Fuel cut at high engine speed not executing

•

Engine load 31.6 % or more

Related DTCs

P0500: Vehicle speed sensor "A" pulse input error

Required Sensors/Components (Main)

Vehicle Speed Sensor (VSS), Combination meter and Skid control ECU

Required Sensors/Components (Related)

Park/neutral Position (PNP) switch, Engine Coolant Temperature (ECT) sensor, 
Crankshaft Position (CKP) sensor and Mass Air Flow (MAF) meter

Frequency of Operation

Continuous

Duration

8 seconds: Manual transmission
Conditions met 500 times: Automatic transmission

MIL Operation

2 driving cycles: Manual transmission
Immediate: Automatic transmission

Sequence of Operation

None

Monitor runs whenever following DTCs not present

None

Time after following conditions met:

4 seconds or more

Ignition switch

ON

Park/neutral position switch

OFF

Vehicle speed

5.59 mph (9 km/h) or more

Time after ignition switch OFF to ON

More than 0.5 seconds

Transfer neutral switch (only for 4WD)

Not N position

Engine coolant temperature

70

°C (158°F) or more

ES–250

1GR-FE ENGINE CONTROL SYSTEM  –  SFI SYSTEM

ES

TYPICAL MALFUNCTION THRESHOLDS

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT:
Read freeze frame data using an intelligent tester. Freeze frame data record 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, if the air-fuel ratio was lean or rich, and other 
data, from the time the malfunction occurred.

(a) Drive the vehicle and check if the operation of the 

speedometer in the combination meter is normal.
HINT:
•

The vehicle speed sensor is operating normally if the 
speedometer reading is normal.

•

If the speedometer does not operate, check it by 
following the procedure described in Speedometer 
Malfunction (See page 

ME-37

).

NG

Engine speed

1,500 to 4,000 rpm

Fuel cut at high engine speed

Not executing

Engine load

31.6 % or more

Vehicle speed sensor signal

No pulse input

1

CHECK OPERATION OF SPEEDOMETER

ECM

SPD

To Main Body ECU, Voltage 
Inverter, Accessory Meter, 
A/C Amplifier and/or 4WD 
Control ECU

14

13 SI

+S

Combination Meter Assembly

From Vehicle 
Speed Sensor or 
Skid Control ECU

E13

8

E46

A133420E01

GO TO MALFUNCTION IN SPEEDOMETER