Toyota Tundra (2015 year). Manual — part 1995
A
(a) Connect the Techstream to the DLC3.
(b) Start the engine.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine and ECT / Data
List / Fuel System Status #1 and Fuel System Status #2.
(e) Confirm that Fuel System Status #1 and Fuel System Status #2
are both CL.
(f) Enter the following menus: Powertrain / Engine and ECT / Data List
/ AF Lambda B1S1 and AF Lambda B2S1.
(g) Confirm that AF Lambda B1S1 and AF Lambda B2S1 are both
Test / Control the Injection Volume.
(i) Read the output voltage from the air fuel ratio sensor when
increasing and decreasing the fuel injection volume.
Standard:
TESTER
DISPLAY
INJECTION
VOLUME
SPECIFIED CONDITION
AFS Voltage
B1S1
AFS Voltage
B2S1
+25%
Air fuel ratio sensor output voltage is
below 3.1 V
-12.5%
Air fuel ratio sensor output voltage is
higher than 3.4 V
Result
RESULT
PROCEED TO
Normal
A
Abnormal
B
HINT:
.
B
REPLACE AIR FUEL RATIO SENSOR
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1604; Startabi...
OK
65.
PERFORM SIMULATION TEST
(a) Check if the idling speed is stable after starting the engine.
OK:
Speed is stable.
HINT:
After replacing the fuel injector or mass air flow meter, check if engine starting trouble occurs again. If engine
starting trouble occurs, replace the ECM. If engine starting trouble still occurs, proceed to step 72 and perform fuel
system troubleshooting A (steps 95 to 102), fuel system troubleshooting B (steps 103 to 105), intake system
troubleshooting (steps 106 to 108), and ignition system troubleshooting (steps 109 to 114), in that order.
Perform "Inspection After Repair" after replacing the mass air flow meter or fuel injector assembly
.
NG
REPLACE FUEL INJECTOR
OK
REPLACE MASS AIR FLOW METER
66.
CHECK FUEL PRESSURE
(a) Inspect the fuel pressure
.
NG
GO TO STEP 71
67.
CHECK SPARK PLUG
(a) Inspect the spark plugs
.
Result
RESULT
PROCEED TO
All cylinders are normal
A
One cylinder is abnormal*1
B
All cylinders are abnormal*2, *3
C
HINT:
.
B
REPLACE SPARK PLUG (ABNORMAL CYLINDER)
C
REPLACE SPARK PLUG (ALL CYLINDER)
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1604; Startabi...
A
A
68.
CONFIRM VEHICLE CONDITION
(a) Confirm the conditions present when the malfunction occurred based on the customer problem analysis.
PROBLEM SYMPTOM
SUSPECTED AREA
PROCEED
TO
When the engine is stopped and a long time has passed, engine
starting trouble occurs*1
Pressure regulator is stuck open
A
When the engine is stopped and approximately 15 to 120 minutes
have passed, engine starting trouble occurs*2
Fuel injector leak
B
When the engine is stopped and approximately 2 to 3 minutes have
passed, engine starting trouble occurs*3
Failure to maintain fuel pressure
by pressure regulator
A
Condition other than above, or there is an inconsistency in the
conditions present when engine starting trouble occurs
-
C*4
HINT:
*1: The pressure regulator may be stuck open. Attach a fuel pressure gauge and check the ability to maintain fuel
pressure after stopping the engine.
*2: Fuel may be leaking from a fuel injector.
*3: The pressure regulator may not be able to maintain the fuel pressure. Attach a fuel pressure gauge and check
the ability to maintain fuel pressure after stopping the engine.
*4: From step 72, perform fuel system troubleshooting A (steps 95 to 102), fuel system troubleshooting B (steps
103 to 105), intake system troubleshooting (steps 106 to 108), and ignition system troubleshooting (steps 109 to
114), in that order.
B
GO TO STEP 70
C
GO TO STEP 72
69.
CHECK FUEL PRESSURE
HINT:
For the fuel pressure inspection, refer to the following procedures
.
(a) Attach a fuel pressure gauge and check the fuel pressure after stopping the engine.
RESULT
PROCEED TO
147 kPa (1.5 kgf/cm2) or higher (5 minutes after stopping the engine)
A*1
Less than 147 kPa (1.5 kgf/cm2) (5 minutes after stopping the engine)
B
HINT:
If the engine cannot be started, check the fuel pressure after cranking the engine.
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1604; Startabi...
*1: From step 72, perform fuel system troubleshooting A (steps 95 to 102), fuel system troubleshooting B (steps
103 to 105), intake system troubleshooting (steps 106 to 108), and ignition system troubleshooting (steps 109 to
114), in that order.
A
GO TO STEP 72
B
REPLACE PRESSURE REGULATOR
70.
CHECK FUEL INJECTOR
RESULT
PROCEED TO
4000 ppm or higher
A
Less than 4000 ppm
B*1
HINT:
If the concentration is 4000 ppm or higher, a fuel injector may have a sealing problem.
*1: From step 72, perform fuel system troubleshooting A (steps 95 to 102), fuel system troubleshooting B (steps
103 to 105), intake system troubleshooting (steps 106 to 108), and ignition system troubleshooting (steps 109 to
114), in that order.
Perform "Inspection After Repair" after replacing the fuel injector assembly
.
B
GO TO STEP 72
A
REPLACE FUEL INJECTOR
71.
PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP / SPEED)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Using the Techstream, select the [Control the Fuel Pump / Speed] Active Test.
(d) When performing the Active Test, check for fuel leakage from the fuel pipes.
Result
RESULT
PROCEED TO
HINT:
CHECK FUEL PUMP CONTROL SYSTEM
A
REPAIR OR REPLACE FUEL LINE
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1604; Startabi...
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