Toyota Tundra (2015 year). Manual — part 1692
OK
REPLACE FUEL SUCTION WITH PUMP AND
GAUGE TUBE ASSEMBLY
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: Fuel Pressur...
Last Modified: 9-16-2014
6.6 J
Doc ID: RM000000WZ30B4X
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: 3UR-FBE 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 ST 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-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: Cranking Ho...
INSPECTION PROCEDURE
PROCEDURE
1.
CHECK CRANKING
TEST RESULT
PROCEED TO
Cranking possible and holding control operates
A
Does not crank
B
Cranking possible but holding control does not operate
C
B
GO TO STEP 2
C
GO TO STEP 11
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: Cranking Ho...
OK
A
PROCEED TO NEXT SUSPECTED AREA SHOWN IN
PROBLEM SYMPTOMS TABLE
2.
READ VALUE USING TECHSTREAM (STARTER SIGNAL)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream ON.
(d) Enter the following menus: Powertrain / Engine and ECT / Data List / Starter Signal.
(e) Read values.
(f) Check the result when the ignition switch is turned to ON and when the engine is started.
Standard:
IGNITION SWITCH POSITION
DISPLAY (STARTER SIGNAL)
ON
OFF
START
ON
NG
GO TO STEP 7
3.
INSPECT STARTER RELAY (ST)
(a) Remove the starter relay (ST) 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
3 - 5
When no battery voltage applied to terminals 1 and 2
10 kΩ or higher
3 - 5
When battery voltage applied to terminals 1 and 2
Below 1 Ω
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: Cranking Ho...
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