Toyota Tundra (2015 year). Manual — part 1996
A
72.
CHECK MALFUNCTION CONDITION
(a) If the malfunction could not be identified during the inspection in steps 38, 39, 40 and 47, perform fuel
system troubleshooting C (steps 73 to 77).
PERFORMED STEP
TROUBLESHOOTING BY SYSTEM
PROCEDURE
PROCEED TO
Steps 38, 39, 40 and 47
Fuel system troubleshooting C
73 to 77
A
(b) If the malfunction could not be identified during the inspection in step 45, perform ignition system
troubleshooting (steps 78 to 83).
PERFORMED STEP
TROUBLESHOOTING BY SYSTEM
PROCEDURE
PROCEED TO
Step 45
Ignition system troubleshooting
78 to 83
B
(c) If the malfunction could not be identified during the inspection in steps 53, 54, 55, 56 and 57 perform
intake air system troubleshooting (steps 84 to 86). If engine starting trouble still occurs, perform fuel
system troubleshooting A (steps 87 to 94).
PERFORMED STEP
TROUBLESHOOTING BY SYSTEM
PROCEDURE
PROCEED TO
Step 53, 54, 55, 56 and 57
Intake air system troubleshooting
84 to 86
C
Fuel system troubleshooting A
87 to 94
(d) If the malfunction could not be identified during the inspection in steps 58, 59, 60, 61, 62, 63, 66, 67,
69, 70, and 71 perform fuel system troubleshooting A (steps 95 to 102), fuel system troubleshooting B
(steps 103 to 105), intake air system troubleshooting (steps 106 to 108), and ignition system
troubleshooting (steps 109 to 114), in that order.
PERFORMED STEP
TROUBLESHOOTING BY SYSTEM
PROCEDURE
PROCEED TO
Steps 58, 59, 60, 61, 62, 63, 66, 67, 69, 70 and 71
Fuel system troubleshooting A
95 to 102
D
Fuel system troubleshooting B
103 to 105
Intake air system troubleshooting
106 to 108
Ignition system troubleshooting
109 to 114
B
GO TO STEP 78
C
GO TO STEP 84
D
GO TO STEP 95
73.
INSPECT FUEL INJECTOR
(a) Inspect the fuel injectors
.
HINT:
Perform "Inspection After Repair" after replacing the fuel injector assembly
.
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1604; Startabi...
OK
OK
NG
REPLACE FUEL INJECTOR
74.
CHECK HARNESS AND CONNECTOR (FUEL INJECTOR POWER SOURCE)
(a) Disconnect the injector connector.
(b) Turn the ignition switch to ON.
(c) Measure the voltage according to the value(s) in the table below.
Standard voltage:
CYLINDER
TESTER
CONNECTION
SWITCH
CONDITION
SPECIFIED
CONDITION
No. 1
H1-2 - Body ground
Ignition switch ON
11 to 14 V
No. 2
F1-2 - Body ground
Ignition switch ON
11 to 14 V
No. 3
H2-2 - Body ground
Ignition switch ON
11 to 14 V
No. 4
F2-2 - Body ground
Ignition switch ON
11 to 14 V
No. 5
H3-2 - Body ground
Ignition switch ON
11 to 14 V
No. 6
F3-2 - Body ground
Ignition switch ON
11 to 14 V
No. 7
H4-2 - Body ground
Ignition switch ON
11 to 14 V
No. 8
F4-2 - Body ground
Ignition switch ON
11 to 14 V
HINT:
REPAIR POWER SOURCE CIRCUIT
75.
CHECK HARNESS AND CONNECTOR (FUEL INJECTOR - ECM)
(a) Disconnect the injector connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:
CYLINDER
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1604; Startabi...
OK
CYLINDER
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
No. 1
H1-1 - Body ground
Always
10 kΩ or higher
H1-1 - D74-86 (#10)
Always
Below 1 Ω
No. 2
F1-1 - Body ground
Always
10 kΩ or higher
F1-1 - D74-109 (#20)
Always
Below 1 Ω
No. 3
H2-1 - Body ground
Always
10 kΩ or higher
H2-1 - D74-85 (#30)
Always
Below 1 Ω
No. 4
F2-1 - Body ground
Always
10 kΩ or higher
F2-1 - D74-108 (#40)
Always
Below 1 Ω
No. 5
H3-1 - Body ground
Always
10 kΩ or higher
H3-1 - D74-84 (#50)
Always
Below 1 Ω
No. 6
F3-1 - Body ground
Always
10 kΩ or higher
F3-1 - D74-107 (#60)
Always
Below 1 Ω
No. 7
H4-1 - Body ground
Always
10 kΩ or higher
H4-1 - D74-83 (#70)
Always
Below 1 Ω
No. 8
F4-1 - Body ground
Always
10 kΩ or higher
F4-1 - D74-106 (#80)
Always
Below 1 Ω
HINT:
REPAIR OR REPLACE HARNESS OR CONNECTOR
76.
CHECK CRANKSHAFT POSITION SENSOR
(a) Replace the crankshaft position sensor
.
(b) Check the engine start operation.
OK:
Malfunction has been repaired successfully.
NG
GO TO STEP 77
OK
END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE)
77.
CHECK CAMSHAFT POSITION SENSOR
(a) Replace the camshaft position sensor
.
(b) Check the engine start operation.
OK:
Malfunction has been repaired successfully.
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1604; Startabi...
OK
OK
NG
REPLACE ECM
OK
END (CAMSHAFT POSITION SENSOR IS DEFECTIVE)
78.
CHECK CRANKSHAFT POSITION SENSOR
OK:
Sensor is installed correctly.
NG
SECURELY REINSTALL SENSOR
79.
CHECK CAMSHAFT POSITION SENSOR
OK:
Sensor is installed correctly.
NG
SECURELY REINSTALL SENSOR
80.
CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM)
(a) Disconnect the crankshaft position sensor connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
D3-1 (NE+) - D74-110 (NE+)
Always
Below 1 Ω
D3-2 (NE-) - D74-111 (NE-)
Always
Below 1 Ω
D3-3 (VC) - D74-66 (VCV2)
Always
Below 1 Ω
D3-1 (NE+) or D74-110 (NE+) - Body ground
Always
10 kΩ or higher
D3-2 (NE-) or D74-111 (NE-) - Body ground
Always
10 kΩ or higher
D3-3 (VC) or D74-66 (VCV2) - Body ground
Always
10 kΩ or higher
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1604; Startabi...
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