Toyota FJ Cruiser (GSJ 10, 15 series). Instruction - part 19

1GR-FE ENGINE CONTROL SYSTEM  –  SFI SYSTEM

ES–31

ES

PROBLEM SYMPTOMS TABLE

HINT:
When a malfunction is not confirmed by a DTC (Diagnostic 
Trouble Code) check and the cause of problem cannot be 
identified through a basic inspection, troubleshoot according 
to the priority order indicated in the table below.

Symptom

Suspected area

See page

Engine does not crank (Does not start)

1. Immobilizer System

-

2. Starter

ST-9

3. STARTER relay

ST-17

No initial combustion (Does not start)

1. ECM power source circuit

ES-384

2. Fuel pump control circuit

ES-394

3. VC output circuit

ES-389

4. ECM

ES-29

Engine cranks normally but difficult to start

1. Fuel pump control circuit

ES-394

2. Compression

EM-3

Difficult to start with cold engine

1. Starter signal circuit

ES-267

2. Fuel pump control circuit

ES-394

3. Spark plug

IG-5

4. Ignition system

ES-199

5. Injector

FU-14

Difficult to start with warm engine

1. Starter signal circuit

ES-267

2. Fuel pump control circuit

ES-394

3. Spark plug

IG-5

4. Ignition system

ES-199

5. Injector

FU-14

High engine idling speed (Poor idling)

1. A/C signal circuit

AC-8

2. ECM power source circuit

ES-384

3. Electronic throttle control system

ES-428

4. Air induction system

-

5. PCV hose

-

Low engine idling speed (Poor idling)

1. A/C signal circuit

AC-8

2. Fuel pump control circuit

ES-394

3. Electronic throttle control system

ES-428

4. Air induction system

-

5. PCV hose

-

Rough idling (Poor idling)

1. Compression

EM-3

2. Fuel pump control circuit

ES-394

3. Electronic throttle control system

ES-428

4. Air induction system

-

5. PCV hose

-

Hunting (Poor idling)

1. ECM power source circuit

ES-384

2. Fuel pump control circuit

ES-394

3. Spark plug

IG-5

4. Ignition system

ES-199

5. Injector

FU-14

6. Electronic throttle control system

ES-428

7. Air induction system

-

8. PCV hose

-

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1GR-FE ENGINE CONTROL SYSTEM  –  SFI SYSTEM

ES

Hesitation/ Poor acceleration (Poor driveability)

1. Fuel pump control circuit

ES-394

2. A/T faulty* (A750E)

AT-22

3. A/T faulty* (A750F)

AT-23

4. Spark plug

IG-5

5. Ignition system

ES-199

6. Injector

FU-14

Surging (Poor driveability)

1. Fuel pump control circuit

ES-394

2. Spark plug

IG-5

3. Ignition system

ES-199

4. Injector

FU-14

Engine stalls soon after starting

1. Fuel pump control circuit

ES-394

2. Spark plug

IG-5

3. Ignition system

ES-199

4. Injector

FU-14

Engine stalls during A/C operation

1. A/C signal circuit

AC-8

2. ECM

ES-29

Unable/difficult to refuel

Refueling valve (canister)

-

Symptom

Suspected area

See page

1GR-FE ENGINE CONTROL SYSTEM  –  SFI SYSTEM

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TERMINALS OF ECM

HINT:
The standard normal voltage between each pair of ECM 
terminals is shown in the table below. The appropriate 
conditions for checking each pair of terminals are also 
indicated.
The result of checks should be compared with the standard 
normal voltage for that pair of terminals, displayed in the STD 
Voltages column.
The illustration above can be used as a reference to identify 
the ECM terminal locations.

1

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

2

3

4

5

6

7

1

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

2

3

4

5

6

7

1

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

2

3

4

5

6

7

1

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

2

3

4

5

6

7

1

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

2

3

4

5

6

7

E47

E46

B3

B2

B1

A121603E03

Symbols (Terminal No.)

Wiring Colors

Terminal Descriptions

Conditions

STD Voltages

BATT (E47-3) - E1 (B3-1)

L - BR

Battery (for measuring the 
battery voltage and for the 
ECM memory)

Always

11 to 14 V

+BM (E47-7) - E1 (B3-1)

GR - BR

Power source of throttle 
motor

Always

11 to 14 V

IGSW (E47-9) - E1 (B3-1)

B-O - BR

Ignition switch

Ignition switch ON

11 to 14 V

+B (E47-1) - E1 (B3-1)

B - BR

Power source of ECM

Ignition switch ON

11 to 14 V

+B2 (E47-2) - E1 (B3-1)

B - BR

Power source of ECM

Ignition switch ON

11 to 14 V

OC1+ (B3-17) - OC1- (B3-16)

G-Y - L-B

Camshaft timing oil control 
valve (OCV)

Ignition switch ON

Pulse generation

(see waveform 1)

OC2+ (B3-15) - OC2- (B3-14)

L-W - L-R

Camshaft timing oil control 
valve (OCV)

Ignition switch ON

Pulse generation

(see waveform 1)

MREL (E47-8) - E1 (B3-1)

W-G - BR

EFI relay

Ignition switch ON

11 to 14 V

VC (B1-23) - E2 (B1-28)

L-R - W-G

Power source of sensor 
(specific voltage)

Ignition switch ON

4.5 to 5.5 V

VG (B1-30) - E2G (B1-29)

R - R-W

Mass air flow meter

Idling, Shift lever position 
P or N, A/C switch OFF

0.5 to 3.0 V

THA (B1-22) - E2 (B1-28)

R-B - W-G

Intake air temperature 
sensor

Idling, Intake air 
temperature 20

°C (68°F)

0.5 to 3.4 V

THW (B1-21) - E2 (B1-28)

B - W-G

Engine coolant 
temperature sensor

Idling, Engine coolant 
temperature 80

°C (176°F)

0.2 to 1.0 V

VTA1 (B1-20) - E2 (B1-28)

G-B - W-G

Throttle position sensor 
(for engine control)

Ignition switch ON, 
Throttle valve fully closed

0.5 to 1.2 V

Ignition switch ON, 
Throttle valve fully open

3.2 to 4.8 V

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1GR-FE ENGINE CONTROL SYSTEM  –  SFI SYSTEM

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VTA2 (B1-19) - E2 (B1-28)

G-W - W-G

Throttle position sensor 
(for sensor malfunction 
detection)

Ignition switch ON, 
Throttle valve fully closed

2.1 to 3.1 V

Ignition switch ON, 
Throttle valve fully open

4.5 to 5.0 V

VPA (E47-18) - EPA (E47-20)

W-R - LG-B

Accelerator pedal position 
sensor (for engine control)

Ignition switch ON, 
Accelerator pedal fully 
released

0.5 to 1.1 V

Ignition switch ON, 
Accelerator pedal fully 
depressed

2.6 to 4.5 V

VPA2 (E47-19) - EPA2 (E47-21)

R-B - V-W

Accelerator pedal position 
sensor (for sensor 
malfunction detection)

Ignition switch ON, 
Accelerator pedal fully 
released

1.2 to 2.0 V

Ignition switch ON, 
Accelerator pedal fully 
depressed

3.4 to 5.0 V

VCPA (E47-26) - EPA (E47-20)

B-Y - LG-B

Power source of 
accelerator pedal position 
sensor (for VPA)

Ignition switch ON

4.5 to 5.5 V

VCP2 (E47-27) - EPA2 (E47-21)

W-L - V-W

Power source of 
accelerator pedal position 
sensor (for VPA2)

Ignition switch ON

4.5 to 5.5 V

HA1A (B2-2) - E04 (B2-7)
HA2A (B2-1) - E05 (B2-6)

R-L - W-B

B-W - W-B

A/F sensor heater

Idling

Below 3.0 V

Ignition switch ON

11 to 14 V

A1A+ (B2-22) - E1 (B3-1)

P - BR

A/F sensor

Ignition switch ON

3.3 V*

1

A2A+ (B2-23) - E1 (B3-1)

Y - BR

A/F sensor

Ignition switch ON

3.3 V*1

A1A- (B2-30) - E1 (B3-1)

L - BR

A/F sensor

Ignition switch ON

2.9 V*

1

A2A- (B2-31) - E1 (B3-1)

BR - BR

A/F sensor

Ignition switch ON

2.9 V*

1

HT1B (B1-1) - E1 (B3-1)
HT2B (B2-5) - E1 (B3-1)

G - BR

L - BR

Heated oxygen sensor 
heater

Idling

Below 3.0 V

Ignition switch ON

11 to 14 V

OX1B (B1-18) - E2 (B1-28)
OX2B (B2-33) - E2 (B1-28)

W - W-G

B - W-G

Heated oxygen sensor

Maintain engine speed at 
2,500 rpm for 2 minutes 
after warming up

Pulse generation

(see waveform 2)

#10 (B3-2) - E01 (B1-7)
#20 (B3-3) - E01 (B1-7)
#30 (B3-4) - E01 (B1-7)
#40 (B3-5) - E01 (B1-7)
#50 (B3-6) - E01 (B1-7)
#60 (B3-7) - E01 (B1-7)

R-L - BR

G - BR
R - BR

W - BR

Y - BR

L - BR

Injector

Ignition switch ON

11 to 14 V

Idling

Pulse generation

(see waveform 3)

KNK1 (B2-29) - EKNK (B2-28)

B - W

Knock sensor

Maintain engine speed at 
4,000 rpm after warming 
up

Pulse generation

(see waveform 4)

KNK2 (B2-21) - EKN2 (B2-20)

G - R

Knock sensor

Maintain engine speed at 
4,000 rpm after warming 
up

Pulse generation

(see waveform 4)

VV1+ (B3-19) - VV1- (B3-29)

R - G

Variable valve timing 
(VVT) sensor

Idling

Pulse generation

(see waveform 5)

VV2+ (B3-18) - VV2- (B3-28)

Y - L

Variable valve timing 
(VVT) sensor

Idling

Pulse generation

(see waveform 5)

NE+ (B3-21) - NE- (B3-20)

B - W

Crankshaft position sensor

Idling

Pulse generation

(see waveform 5)

IGT1 (B1-8) - E1 (B3-1)
IGT2 (B1-9) - E1 (B3-1)
IGT3 (B1-10) - E1 (B3-1)
IGT4 (B1-11) - E1 (B3-1)
IGT5 (B1-12) - E1 (B3-1)
IGT6 (B1-13) - E1 (B3-1)

Y-R - BR

G - BR

B-W - BR

Y-G - BR

GR - BR

L - BR

Ignition coil with igniter 
(ignition signal)

Idling

Pulse generation

(see waveform 6)

Symbols (Terminal No.)

Wiring Colors

Terminal Descriptions

Conditions

STD Voltages