Toyota Tundra (2015 year). Manual — part 1115
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(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 / MAP.
(e) Read the MAP value.
Standard:
ENGINE CONDITION
TECHSTREAM DISPLAY
Ignition switch ON
85 to 110 kPa (638 to 825 mmHg)
HINT:
Standard atmospheric pressure is 101 kPa. For every 100 m increase in altitude, pressure drops by 1 kPa.
Varies by weather (high atmospheric pressure, low atmospheric pressure).
Also, check "Atmosphere Pressure" in the Data List.
OK
GO TO STEP 6
NG
GO TO STEP 5
5.
REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR
(a) Replace the manifold absolute pressure sensor
.
6.
PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE EGR STEP POSITION)
(a) Connect the Techstream to the DLC3.
(b) Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or
higher.
HINT:
When performing the Active Test, make sure the shift lever is in P or N.
The A/C switch and all accessory switches should be off.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step
Position.
(e) Confirm the Throttle Idle Position is ON and check the engine idling condition and MAP values in the
Data List while performing the Active Test.
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P006A; MAP ...
OK
HINT:
Do not leave the EGR valve open for 10 seconds or more during the Active Test.
Be sure to return the EGR valve to step 0 when the Active Test is completed.
OK:
MAP and idling condition change in response to EGR step position as follows.
Standard:
-
EGR STEP POSITION (ACTIVE TEST)
0 STEPS
0 TO 30 STEPS
Idling
condition
Steady idling
Idling changes from steady to rough idling or engine stall
MAP
(Data List)
20 to 40 kPa (150 to 300
mmHg)
MAP value is at least +10 kPa (75 mmHg) higher than when EGR
valve is fully closed
OK
GO TO STEP 8
NG
GO TO STEP 7
7.
INSPECT EGR VALVE ASSEMBLY
(a) Remove the EGR valve assembly
.
(b) Check if the EGR valve assembly is stuck open.
OK:
EGR valve is tightly closed.
HINT:
Perform "Inspection After Repairs" after replacing the EGR valve assembly
.
NG
REPLACE EGR VALVE ASSEMBLY
8.
CHECK WHETHER DTC OUTPUT RECURS (DTC P006A)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON and turn the Techstream on.
(c) Clear the DTC
.
(d) Start the engine and warm it up (until the engine coolant temperature is 75°C (167°F) or higher)
with all the accessories switched off.
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P006A; MAP ...
A
HINT:
The A/C switch and all accessory switches should be off, and the shift lever should be in N or P.
(e) Idle the engine for 30 seconds or more.
(f) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
(g) Read the DTCs.
RESULT
PROCEED TO
P006A is output
A
No DTC output
B
B
END
9.
INSPECT MASS AIR FLOW METER
(a) Connect the Techstream to the DLC3.
(b) Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or
higher.
HINT:
The A/C switch and all accessory switches should be off, and the shift lever should be in N or P.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine and ECT / Data List / MAF.
(e) Check MAF in the Data List during idling.
Standard:
3.4 to 6.2 gm/sec
HINT:
Perform "Inspection After Repairs" after replacing the mass air flow meter
.
NG
REPLACE MASS AIR FLOW METER
OK
REPLACE ECM
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P006A; MAP ...
Last Modified: 9-16-2014
6.6 C
Doc ID: RM000000PF40E4X
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: 1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0101; Mass Air Flow Circuit Range / Performance
Problem; 2015 MY Tundra [08/2014 - ]
DTC
P0101
Mass Air Flow Circuit Range / Performance Problem
DESCRIPTION
Refer to DTC P0102
.
DTC
NO.
DTC DETECTION CONDITION
TROUBLE AREA
P0101
Conditions (a), (b), (c), (d) and (e) continue for more than 10 seconds
(2 trip detection logic):
(a) Engine running
(b) Engine coolant temperature 70°C (158°F) or higher
(c) Throttle Position (TP) sensor voltage 0.2 V or more and 2 V or less
(d) Average engine load value ratio less than 0.85, or more than 1.15
(varies with estimated engine load)
Average engine load value ratio = Average engine load based on MAF
meter output / Average engine load estimated from driving conditions
(e) Average air-fuel ratio less than -20%, or more than 20%
Mass Air Flow
(MAF) meter
Intake system
PCV hose
connections
EGR valve
assembly
MONITOR DESCRIPTION
an internal thermistor, affecting their resistance. To maintain a constant current value, the ECM varies the
voltage applied to the wire and internal thermistor. The voltage level is proportional to the airflow through the
sensor, and the ECM uses it to calculate the intake air volume.
The ECM monitors the average engine load value ratio to check the MAF meter for malfunctions. The average
engine load value ratio is obtained by comparing the average engine load calculated from the MAF meter output
to the average engine load estimated from the driving conditions, such as the engine speed and the throttle
opening angle. If the average engine load value ratio is below the threshold value, the ECM determines that the
intake air volume is low, and if the average engine load value ratio is above the threshold value, the ECM
determines that the intake air volume is high.
If this is detected in 2 consecutive driving cycles, the MIL is illuminated and a DTC is stored.
MONITOR STRATEGY
Related DTCs
P0101: Mass air flow meter rationality
Required Sensors/Components
(Main)
Mass air flow meter
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0101; Mass A...
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