Toyota Tundra. Manual — part 1485

Fig. 18: Identifying Waveform 2
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

HINT:

In DATA LIST, item O2S B1 S2 shows the ECM input values from the heated oxygen sensor.

d. WAVEFORM 3:

Injector No. 1 (to No. 8) injection signal

WAVEFORM REFERENCE

D74-114 (OX1B) - D74-
115 (EX1B)

0.2 V/DIV., 200
msec./DIV.

Engine speed maintained at 2500 RPM for 2
minutes after warming up sensor

D74-112 (OX2B) - D74-
113 (EX2B)

0.2 V/DIV., 200
msec./DIV.

Engine speed maintained at 2500 RPM for 2
minutes after warming up sensor

Terminal No. (Symbols)

Tool Setting

Condition

D74-86 (#10) - D74-43 (E01) 20 V/DIV., 20 msec./DIV.

Idling

D74-109 (#20) - D74-43 (E01) 20 V/DIV., 20 msec./DIV.

Idling

D74-85 (#30) - D74-43 (E01) 20 V/DIV., 20 msec./DIV.

Idling

D74-108 (#40) - D74-43 (E01) 20 V/DIV., 20 msec./DIV.

Idling

D74-84 (#50) - D74-43 (E01) 20 V/DIV., 20 msec./DIV.

Idling

D74-107 (#60) - D74-43 (E01) 20 V/DIV., 20 msec./DIV.

Idling

D74-83 (#70) - D74-43 (E01) 20 V/DIV., 20 msec./DIV.

Idling

D74-106 (#80) - D74-43 (E01) 20 V/DIV., 20 msec./DIV.

Idling

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

Fig. 19: Identifying Waveform 3
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

HINT:

The wavelength becomes shorter as the engine speed increases.

e. WAVEFORM 4:

Knock sensor

WAVEFORM REFERENCE

Terminal No. (Symbols)

Tool Setting

Condition

D74-94 (KNK1) - D74-93
(EKNK)

1 V/DIV., 1
msec./DIV.

Engine speed maintained at 4000 RPM after
warming up engine

D74-117 (KNK2) - D74-116
(EKN2)

1 V/DIV., 1
msec./DIV.

Engine speed maintained at 4000 RPM after
warming up engine

D74-96 (KNK3) - D74-95
(EKN3)

1 V/DIV., 1
msec./DIV.

Engine speed maintained at 4000 RPM after
warming up engine

D74-119 (KNK4) - D74-118
(EKN4)

1 V/DIV., 1
msec./DIV.

Engine speed maintained at 4000 RPM after
warming up engine

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

Fig. 20: Identifying Waveform 4
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

HINT:



The wavelength becomes shorter as the engine speed increases.



The waveforms and amplitudes displayed differ slightly depending on the vehicle.

f. WAVEFORM 5:

Crankshaft position sensor and VVT sensor for intake side

WAVEFORM REFERENCE

Terminal No. (Symbols)

Tool Setting

Condition

(a) D74-110 (NE+) - D74-111 (NE-) 5 V/DIV., 20 msec./DIV. Idle after engine warmed up
(b) D74-92 (VV1+) - D74-91 (VV1-) 5 V/DIV., 20 msec./DIV. Idle after engine warmed up
(c) D74-87 (VV2+) - D74-88 (VV2-) 5 V/DIV., 20 msec./DIV. Idle after engine warmed up

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

HINT:

The wavelength becomes shorter as engine speed increases.

Fig. 21: Identifying Waveform 5
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

g. WAVEFORM 6:

Igniter IGT signal (from ECM to igniter) and Igniter IGF signal (from igniter to ECM)

Fig. 22: Identifying Waveform 6
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

WAVEFORM REFERENCE

Terminal No. (Symbols)

Tool Setting

Condition

(a) D74-40 (IGT1) - D74-81 (E1) 2 V/DIV., 20 msec./DIV.

Idling

(a) D74-33 (IGT2) - D74-81 (E1) 2 V/DIV., 20 msec./DIV.

Idling

(a) D74-37 (IGT3) - D74-81 (E1) 2 V/DIV., 20 msec./DIV.

Idling

(a) D74-34 (IGT4) - D74-81 (E1) 2 V/DIV., 20 msec./DIV.

Idling

(a) D74-35 (IGT5) - D74-81 (E1) 2 V/DIV., 20 msec./DIV.

Idling

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra