Toyota Tundra (2015 year). Manual — part 1912
A
OK
Rich: During the Control the Injection Volume, the AFS Voltage is consistently below 3.1 V, and the O2S is
consistently higher than 0.55 V.
B
GO TO STEP 11
5.
READ VALUE USING TECHSTREAM (COOLANT TEMP)
(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 / All Data / Coolant Temp.
(e) Read the Coolant Temp twice, when the engine is both cold and warmed up.
Standard:
With cold engine: Same as ambient air temperature.
With warm engine: Between 75°C and 100°C (167°F and 212°F).
HINT:
Perform "Inspection After Repair" after replacing the engine coolant temperature sensor
.
NG
REPLACE ENGINE COOLANT TEMPERATURE
SENSOR
6.
READ VALUE USING TECHSTREAM (MAF)
(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 / All Data / MAF and
Coolant Temp.
(e) Allow the engine to idle until the Coolant Temp reaches 75°C (167°F) or more.
(f) Read MAF with the engine speed at 3000 rpm.
Standard:
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0171,P0172...
OK
OK
OK
NEXT
Between 18.0 gm/sec and 27.0 gm/sec (shift lever: N; A/C: Off).
NG
GO TO STEP 16
7.
CHECK FUEL PRESSURE
(a) Check the fuel pressure
.
NG
REPAIR OR REPLACE FUEL SYSTEM
8.
CHECK FOR EXHAUST GAS LEAK
(a) Check for exhaust gas leak.
OK:
No gas leakage.
HINT:
Perform "Inspection After Repair" after repairing or replacing the exhaust system
.
NG
REPAIR OR REPLACE EXHAUST SYSTEM
9.
CHECK FOR SPARKS AND IGNITION
10.
INSPECT FUEL INJECTOR (INJECTION AND VOLUME)
(a) Check the injection volume
.
HINT:
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0171,P0172...
OK
OK
OK
NEXT
Perform "Inspection After Repair" after replacing the fuel injector assembly
.
OK
GO TO STEP 15
NG
REPLACE FUEL INJECTOR
11.
INSPECT AIR-FUEL RATIO SENSOR (HEATER RESISTANCE)
NG
REPLACE AIR FUEL RATIO SENSOR
12.
CHECK TERMINAL VOLTAGE (+B OF AIR FUEL RATIO SENSOR)
NG
GO TO STEP 21
13.
CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR - ECM)
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
14.
REPLACE AIR FUEL RATIO SENSOR
(a) Replace the air fuel ratio sensor
.
HINT:
Perform "Inspection After Repair" after repairing or replacing the air fuel ratio sensor
.
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0171,P0172...
A
NEXT
15.
PERFORM CONFIRMATION DRIVING PATTERN
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Clear DTCs
.
(e) Turn the ignition switch off and wait for at least 30 seconds.
(f) Turn the ignition switch to ON and turn the Techstream on.
(g) Start the engine and warm it up.
(h) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving
Pattern.
(i) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
(j) Input the DTC: P0171, P0172, P0174 or P0175.
(k) Read DTCs.
Result
RESULT
PROCEED TO
ABNORMAL (DTC P0171, P0172, P0174 or P0175 is output)
A
NORMAL (No DTC is output)
B
B
END
16.
CHECK HARNESS AND CONNECTOR
.
HINT:
Repair any problems.
17.
CHECK WHETHER DTC OUTPUT RECURS (DTC P0171, P0172, P0174 OR P0175)
(a) Connect the Techstream to the DLC3.
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0171,P0172...
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