Toyota Tundra (2015 year). Manual — part 1861
(j) WAVEFORM 9:
Throttle actuator positive terminal
TERMINAL NO.
(SYMBOLS)
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.
(k) WAVEFORM 10:
Throttle actuator negative terminal
TERMINAL NO.
(SYMBOLS)
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.
(l) WAVEFORM 11:
Engine speed signal
TERMINAL NO. (SYMBOLS)
TOOL SETTING
CONDITION
A24-15 (TACH) - D74-81
(E1)
5 V/DIV., 10
msec./DIV.
Idling
HINT:
The wavelength becomes shorter as the engine rpm
increases.
(m) WAVEFORM 12:
CAN communication signal
TERMINAL NO.
(SYMBOLS)
TOOL SETTING
CONDITION
A24-10 (CANH) -
D74-81 (E1)
1 V/DIV., 10
µsec./DIV.
Engine stops and
ignition switch ON
HINT:
The waveform varies depending on the CAN communication
signal.
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: TERMINALS...
(n) WAVEFORM 13:
CAN communication signal
TERMINAL NO.
(SYMBOLS)
TOOL SETTING
CONDITION
A24-11 (CANL) -
D74-81 (E1)
1 V/DIV., 10
µsec./DIV.
Engine stops and
ignition switch ON
HINT:
The waveform varies depending on the CAN communication
signal.
(o) WAVEFORM 14:
Crankshaft position sensor and camshaft position sensor
TERMINAL NO.
(SYMBOLS)
TOOL SETTING
CONDITION
CH1: D74-110 (NE+) -
D74-111 (NE-)
5 V/DIV., 20
msec./DIV.
Idle after engine
warmed up
CH2: D74-90 (G2) -
D74-89 (G2-)
5 V/DIV., 20
msec./DIV.
Idle after engine
warmed up
HINT:
The wavelength becomes shorter as the engine rpm
increases.
(p) WAVEFORM 15:
(SYMBOLS)
TOOL SETTING
CONDITION
D74-30 (AIDI) -
D74-81 (E1)
5 V/DIV., 50
msec./DIV.
Performing system check using
Techstream (secondary air
injection check)
D74-29 (AID2) -
D74-81 (E1)
5 V/DIV., 50
msec./DIV.
Performing system check using
Techstream (secondary air
injection check)
HINT:
The wavelength changes when the air injection control driver
detects malfunctions in the secondary air injection system
.
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: TERMINALS...
(q) WAVEFORM 16:
Crankshaft position sensor and VVT sensor for exhaust side
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) D74-69 (EV1+) -
D74-68 (EV1-)
5 V/DIV., 20
msec./DIV.
Idle after engine
warmed up
(c) D74-64 (EV2+) -
D74-65 (EV2-)
5 V/DIV., 20
msec./DIV.
Idle after engine
warmed up
HINT:
The wavelength becomes shorter as engine rpm increases.
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: TERMINALS...
Last Modified: 9-16-2014
6.6 D
Doc ID: RM000000PDJ15GX
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: 3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: DIAGNOSIS SYSTEM; 2015 MY Tundra [08/2014 -
]
DIAGNOSIS SYSTEM
1. DESCRIPTION
When troubleshooting OBD II (On-Board Diagnostics) vehicles, the Techstream (complying with SAE
OBD II regulations require that the vehicle's on-board computer illuminate the MIL (Malfunction
Indicator Lamp) on the instrument panel when the computer detects a malfunction in:
The emission control systems components.
a.
The powertrain control components (which affect vehicle emissions).
b.
The computer itself.
c.
In addition, the applicable DTCs prescribed by SAE J2012 are recorded in the ECM memory. If the
malfunction does not recur in 3 consecutive trips, the MIL turns off automatically but the DTCs remain
recorded in the ECM memory.
To check the DTCs, connect the Techstream to the DLC3. The Techstream displays DTCs, freeze frame
Controller Area Network (CAN) communication is used in this system. CAN is a network which uses a
2. NORMAL MODE AND CHECK MODE
The diagnosis system operates in normal mode during normal vehicle use. In normal mode, 2 trip detection
the system's ability to detect malfunctions, including intermittent problems (Techstream only).
3. 2 TRIP DETECTION LOGIC
When a malfunction is first detected, the malfunction is temporarily stored in the ECM memory (1st
trip). If the same malfunction is detected during the next subsequent drive cycle, the MIL is illuminated
(2nd trip).
4. FREEZE FRAME DATA
The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is
stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was
moving or stationary, whether the engine was warmed up or not, whether the air-fuel ratio was lean or
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