Toyota Tundra (2015 year). Manual — part 1478
SYMPTOM
SUSPECTED AREA
SEE
PAGE
Air induction system
ECM power source circuit
Acoustic Control Induction System (ACIS)
Fuel pressure switching system
Hesitation/Poor acceleration
Fuel pump control circuit
Spark plug
Ignition system
Fuel injector
Mass air flow meter
Electronic throttle control system
Air induction system
Compression
Fuel pressure switching system
Brake override system
Alcohol concentration
Surging (Poor driveability)
Spark plug
Fuel pump control circuit
Ignition system
Fuel injector
Mass air flow meter
Variable valve timing system
Compression
Fuel pressure switching system
Alcohol concentration
Engine stalls soon after starting
Fuel pump control circuit
Spark plug
Ignition system
Fuel injector
Variable valve timing system
Electronic throttle control system
Air induction system
PCV hose
Compression
Fuel pressure switching system
Alcohol concentration
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: PROBLEM...
SYMPTOM
SUSPECTED AREA
SEE
PAGE
Engine stalls only during A/C
operation
A/C signal circuit (for Automatic Air Conditioning System)
A/C signal circuit (for Manual Air Conditioning System)
ECM
Unable/difficult to refuel
Fuel system (canister, refueling valve, roll over valve, fuel
tank, etc.)
-
HINT:
Due to the factors listed below, cold engine starting trouble, rough idle, poor drivability, and engine stall
may occur:
Last Modified: 9-16-2014
6.6 U
Doc ID: RM000000PDH0QKX
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: 3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: TERMINALS OF ECM; 2015 MY Tundra [08/2014 -
]
TERMINALS OF ECM
1. CHECK ECM
(a) Measure the voltage according to the value(s) in the table below.
HINT:
TERMINAL NO.
(SYMBOL)
WIRING
COLOR
TERMINAL DESCRIPTION
CONDITION
SPECIFIED
CONDITION
A24-1 (BATT) -
D74-81 (E1)
L - BR
Battery (for measuring
battery voltage and for ECM
memory)
Always
11 to 14 V
D74-41 (+BM) -
D74-81 (E1)
P - BR
Always
11 to 14 V
A24-28 (IGSW) -
D74-81 (E1)
LG - BR
Ignition switch
Ignition switch ON
11 to 14 V
A24-3 (+B) -
D74-81 (E1)
GR - BR
11 to 14 V
A24-2 (+B2) -
D74-81 (E1)
GR - BR
11 to 14 V
D74-58 (OC1+)
- D74-57 (OC1-)
B - B-L
Camshaft timing oil control
valve (OCV) (for Intake Side
Pulse
generation
(see waveform
1)
D74-52 (OC2+)
- D74-51 (OC2-)
L-B - R-B
Camshaft timing oil control
valve (OCV) (for Intake Side
Pulse
generation
(see waveform
1)
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: TERMINA...
TERMINAL NO.
(SYMBOL)
WIRING
COLOR
TERMINAL DESCRIPTION
CONDITION
SPECIFIED
CONDITION
D74-56 (OE1+) -
D74-55 (OE1-)
L-W - L-B
Camshaft timing oil control
valve (OCV) (for Exhaust Side
Pulse
generation
(see waveform
1)
D74-50 (OE2+) -
D74-49 (OE2-)
L-R - L
Camshaft timing oil control
valve (OCV) (for Exhaust Side
Pulse
generation
(see waveform
1)
A24-34 (MREL) -
D74-81 (E1)
W - BR
EFI relay
Ignition switch ON
11 to 14 V
D74-74 (VG) -
D74-75 (E2G)
L-Y - G-W Mass air flow meter
Idling, Shift lever position P or
N, A/C switch OFF
0.5 to 3.0 V
D74-73 (THA) -
D74-97 (ETHW)
Y-B - BR
Intake air temperature sensor
Idling, Intake air temperature
20°C (68°F)
0.5 to 3.4 V
D74-76 (THW) -
D74-98 (ETHA)
G-B - BR
Engine coolant temperature
sensor
Idling, Engine coolant
temperature 80°C (176°F)
0.2 to 1.0 V
D74-80 (VCTA) -
D74-79 (ETA)
Y - L
voltage)
Ignition switch ON
4.5 to 5.5 V
D74-78 (VTA1) -
D74-79 (ETA)
R-Y - L
Throttle position sensor (for
engine control)
Ignition switch ON,
Throttle valve fully closed
0.5 to 1.1 V
Ignition switch ON,
Throttle valve fully open
3.2 to 4.8 V
D74-77 (VTA2) -
D74-79 (ETA)
Y-B - L
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
4.6 to 5.0 V
A24-55 (VPA) -
A24-58 (EPA)
W - BE
Accelerator pedal position
sensor (for engine control)
Ignition switch ON,
Accelerator pedal released
0.5 to 1.1 V
Ignition switch ON,
Accelerator pedal fully
depressed
2.6 to 4.5 V
A24-56 (VPA2) -
A24-60 (EPA2)
LG - P
Accelerator pedal position
sensor (for sensor
malfunctioning detection)
Ignition switch ON,
Accelerator pedal released
1.2 to 2.0 V
Ignition switch ON,
Accelerator pedal fully
depressed
3.4 to 4.7 V
A24-57 (VCPA) -
A24-58 (EPA)
B - BE
VPA)
Ignition switch ON
4.5 to 5.5 V
A24-59 (VCP2) -
A24-60 (EPA2)
V - P
VPA2)
Ignition switch ON
4.5 to 5.5 V
D74-22 (HA1A) -
L - W-B
A/F sensor heater (for Bank 1
Idling
Below 3.0 V
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: TERMINA...
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