Toyota Tundra (2015 year). Manual — part 1081
(c) WAVEFORM 2:
Air Fuel Ratio Sensor Heater
TERMINAL NO. (SYMBOL)
TOOL SETTING
CONDITION
CH1: D74-22 (HA1A) -
D74-23 (E04)
5 V/DIV., 10
msec./DIV.
Idling with warm
engine
CH2: D74-20 (HA2A) -
D74-21 (E05)
5 V/DIV., 10
msec./DIV.
Idling with warm
engine
HINT:
The wavelength varies in accordance with the engine operating
conditions.
(d) WAVEFORM 3:
Heated Oxygen Sensor
TERMINAL NO.
(SYMBOL)
TOOL SETTING
CONDITION
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
HINT:
In the Data List, item O2S B1S2 and O2S B2S2 show the ECM
input values from the heated oxygen sensor.
(e) WAVEFORM 4:
Fuel Injector No. 1 (to No. 8) Injection Signal
TERMINAL NO. (SYMBOL)
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
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: TERMINALS...
TERMINAL NO. (SYMBOL)
TOOL SETTING
CONDITION
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
HINT:
The wavelength becomes shorter as the engine rpm increases.
(f) WAVEFORM 5:
Knock Sensor
TERMINAL NO.
(SYMBOL)
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
HINT:
The wavelength becomes shorter as the engine rpm increases.
The waveforms and amplitudes displayed differ slightly
depending on the vehicle.
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: TERMINALS...
(g) WAVEFORM 6:
Crankshaft Position Sensor and VVT Sensor for Intake Side
TERMINAL NO. (SYMBOL)
TOOL SETTING
CONDITION
(a) D74-110 (NE+) -
D74-111 (NE-)
5 V/DIV., 20
msec./DIV.
Idling after engine
warmed up
(b) D74-92 (VV1+) -
D74-91 (VV1-)
5 V/DIV., 20
msec./DIV.
Idling after engine
warmed up
(c) D74-87 (VV2+) -
D74-88 (VV2-)
5 V/DIV., 20
msec./DIV.
Idling after engine
warmed up
HINT:
The wavelength becomes shorter as engine rpm increases.
(h) WAVEFORM 7:
Igniter IGT Signal (from ECM to Igniter) and Igniter IGF Signal
(from Igniter to ECM)
TERMINAL NO. (SYMBOL)
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
(a) D74-36 (IGT6) - D74-81
(E1)
2 V/DIV., 20
msec./DIV.
Idling
(a) D74-38 (IGT7) - D74-81
(E1)
2 V/DIV., 20
msec./DIV.
Idling
(a) D74-39 (IGT8) - D74-81
(E1)
2 V/DIV., 20
msec./DIV.
Idling
(b) D74-104 (IGF1) - D74-81
(E1)
2 V/DIV., 20
msec./DIV.
Idling
(b) D74-105 (IGF2) - D74-81
(E1)
2 V/DIV., 20
msec./DIV.
Idling
HINT:
The wavelength becomes shorter as engine rpm increases.
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: TERMINALS...
(i) WAVEFORM 8:
Purge VSV
TERMINAL NO. (SYMBOL)
TOOL SETTING
CONDITION
D74-63 (PRG) - D74-81 (E1) 10 V/DIV., 20 msec./DIV.
Idling
HINT:
If the waveform is not similar to the illustration, check the
waveform again after idling for 10 minutes or more.
(j) WAVEFORM 9:
Vehicle Speed Signal
TERMINAL NO.
(SYMBOL)
TOOL SETTING
CONDITION
A24-13 (SPD) -
D74-81 (E1)
2 V/DIV., 20
msec./DIV.
Driving at 20 km/h (12
mph)
HINT:
The wavelength becomes shorter as the vehicle speed increases.
(k) WAVEFORM 10:
Throttle Actuator Positive Terminal
TERMINAL NO. (SYMBOL)
TOOL SETTING
CONDITION
D74-19 (M+) - D74-82
(ME01)
5 V/DIV., 1
msec./DIV.
Idling with warm
engine
HINT:
The duty ratio varies depending on the throttle actuator
operation.
(l) WAVEFORM 11:
Throttle Actuator Negative Terminal
TERMINAL NO. (SYMBOL)
TOOL SETTING
CONDITION
D74-18 (M-) - D74-82
(ME01)
5 V/DIV., 1
msec./DIV.
Idling with warm
engine
HINT:
The duty ratio varies depending on the throttle actuator
operation.
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: TERMINALS...
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