Toyota Tundra (2015 year). Manual — part 433
Last Modified: 9-16-2014
6.6 U
Doc ID: RM000000W740LMX
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: A760F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION SYSTEM: TERMINALS OF ECM; 2015
MY Tundra [08/2014 - ]
TERMINALS OF ECM
1. CHECK ECM
HINT:
The standard voltage at each ECM terminal is shown in the table below.
In the table, first follow the information under "Condition". Look under "Terminal No. (Symbol)" for the
terminals to inspect. The standard voltage between the terminals is shown under "Specified Condition".
Use the illustration above as a reference for the ECM terminals.
TERMINAL NO.
(SYMBOL)
WIRING
COLOR
TERMINAL
DESCRIPTION
CONDITION
SPECIFIED
CONDITION
A24-21 (L4) -
D74-81 (E1)
G - BR
4L position signal
Ignition switch ON
Transfer position
switch on 4L
Below 1.5 V
Ignition switch ON
Transfer position
switch not on 4L
11 to 14 V
D74-120 (NSW) -
D74-81 (E1)
L - BR
PNP switch signal
Ignition switch ON
Shift lever in P or N
Below 1 V
Ignition switch ON
Shift lever not in P or
N
11 to 14 V
D74-2 (P) - D74-81
(E1)
G-B - BR
P shift position switch
signal
Ignition switch ON
Shift lever in P
11 to 14 V
A760F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISS...
(a) Using an oscilloscope, check waveform 1.
Reference
TERMINAL NO.
(SYMBOL)
TOOL SETTING
CONDITION
D74-101 (SP2+) -
D74-100 (SP2-)
2 V/DIV., 20
msec./DIV.
Vehicle speed 20 km/h
(12 mph)
(b) Using an oscilloscope, check waveform 2.
Reference
TERMINAL NO.
(SYMBOL)
TOOL SETTING
CONDITION
D74-124 (NT+) -
D74-123 (NT-)
1 V/DIV., 2
msec./DIV.
Engine idling (shift lever
in P or N)
(c) Using an oscilloscope, check waveform 3.
Reference
TERMINAL NO. (SYMBOL)
TOOL SETTING
CONDITION
A24-10 (CANH) - D74-81
(E1)
1 V/DIV., 10
µsec./DIV.
Ignition switch
ON
(d) Using an oscilloscope, check waveform 4.
Reference
TERMINAL NO. (SYMBOL)
TOOL SETTING
CONDITION
A24-11 (CANL) - D74-81
(E1)
1 V/DIV., 10
µsec./DIV.
Ignition switch
ON
A760F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISS...
Last Modified: 9-16-2014
6.6 D
Doc ID: RM000000W76109X
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: A760F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION SYSTEM: DIAGNOSIS SYSTEM; 2015
MY Tundra [08/2014 - ]
DIAGNOSIS SYSTEM
1. DESCRIPTION
(a) When troubleshooting On-Board Diagnostic (OBD II) vehicles, the vehicle must be connected to the OBD II
scan tool (complying with SAE J1987). Various data output from the vehicle's ECM can then be read.
(b) OBD II regulations require that the vehicle's on-board computer
illuminate the Malfunction Indicator Lamp (MIL) on the
instrument panel when the computer detects a malfunction in:
The emission control system/components
The powertrain control components (which affect
vehicle emissions)
The computer
In addition, the applicable Diagnostic Trouble Codes (DTCs)
prescribed by SAE J2012 are recorded in the ECM memory.
When the malfunction does not reoccur, the MIL stays
illuminated until the ignition switch is turned off, and the MIL
turns off when the engine is started. However, the DTCs remain
recorded in the ECM memory.
The DTCs and freeze frame data can be cleared with the Techstream
.
2. NORMAL MODE AND CHECK MODE
(a) The diagnosis system operates in "normal mode" during normal vehicle use. In normal mode, "2-trip
symptoms and increasing the system's ability to detect malfunctions, including intermittent malfunctions.
3. 2-TRIP DETECTION LOGIC
(a) 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 drive cycle, the MIL is illuminated (2nd trip).
4. FREEZE FRAME DATA
(a) Freeze frame data records the engine conditions (fuel system data, calculated load, engine coolant
temperature, fuel trim, engine speed, vehicle speed, etc.) when a malfunction is 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.
A760F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISS...
(b) The Techstream records freeze frame data at 5 different times:
1) 3 times before the DTC is stored, 2) once when the DTC is
stored, and 3) once after the DTC is stored. These data can be
used to reproduce the vehicle conditions around the time when
the malfunction occurred. The data may be helpful in finding the
5. CHECK DATA LINK CONNECTOR 3 (DLC3)
6. CHECK MIL
(a) Check that the MIL illuminates when turning the ignition switch to ON.
If the MIL does not illuminate, there is a problem in the MIL circuit
.
(b) When the engine is started, the MIL should turn off.
A760F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISS...
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