Toyota Tundra (2015 year). Manual — part 2057
OK
OK
(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
NG
GO TO STEP 4
2.
INSPECT INJECTOR ASSEMBLY
(a) Inspect the injector
.
HINT:
Perform "Inspection After Repair" after replacing the fuel injector assembly
.
NG
REPLACE INJECTOR ASSEMBLY
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: Fuel Injector C...
3.
CHECK HARNESS AND CONNECTOR (INJECTOR ASSEMBLY - ECM)
(a) Disconnect the injector connector.
(b) Disconnect the D74 ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:
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
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPLACE ECM
4.
INSPECT FUSE (INJ, IG2 MAIN)
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: Fuel Injector C...
OK
(a) Remove the INJ fuse and IG2 MAIN fuse from the engine
room relay block.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
INJ fuse
Always
Below 1 Ω
IG2 MAIN fuse
Always
Below 1 Ω
NG
CHECK FOR SHORT IN ALL HARNESSES AND
CONNECTORS CONNECTED TO FUSE AND
REPLACE FUSE
5.
INSPECT INTEGRATION RELAY (IG2)
(a) Inspect the integration relay
.
NG
REPLACE INTEGRATION RELAY
OK
REPAIR OR REPLACE HARNESS OR CONNECTOR
(INTEGRATION RELAY - INJECTOR ASSEMBLY)
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: Fuel Injector C...
Last Modified: 9-16-2014
6.6 J
Doc ID: RM000000WZ30B5X
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: 3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: Cranking Holding Function Circuit; 2015 MY Tundra
[08/2014 - ]
Cranking Holding Function Circuit
DESCRIPTION
The cranking holding control system provides current to the starter when the ECM detects the ignition switch's
start signal (STSW). When the ECM performs a firing judgment, the system cuts current to the starter. When
output signal travels through the Park / Neutral Position (PNP) switch to the STARTER relay, causing the
starter to activate.
When the engine is cranking, the starter operation signal is sent to the ECM's STA terminal.
WIRING DIAGRAM
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: Cranking Hold...
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