Toyota Tundra (2015 year). Manual — part 1137
TECHSTREAM
DISPLAY
DESCRIPTION
NORMAL
DTC judgment completed
System normal
ABNORMAL
DTC judgment completed
System abnormal
INCOMPLETE
DTC judgment not completed
Perform driving pattern after confirming DTC enabling conditions
N/A
Unable to perform DTC judgment
HINT:
If the judgment result shows ABNORMAL, the system has a malfunction.
If the judgment result shows NORMAL, the system is normal.
If the judgment result shows INCOMPLETE or N/A, drive the vehicle with the shift lever in S, and then perform
step [C] again.
If no pending DTC is output, perform a universal trip and check for permanent DTCs
.
HINT:
If a permanent DTC is output, the system is malfunctioning.
If no permanent DTC is output, the system is normal.
19.
WIRING DIAGRAM
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0136-P0139,...
INSPECTION PROCEDURE
HINT:
Malfunctioning areas can be identified by performing the Control the Injection Volume for A/F Sensor function provided in the
Active Test. The Control the Injection Volume for A/F Sensor function can help to determine whether the Air-Fuel Ratio (A/F)
sensor, Heated Oxygen (HO2) sensor and other potential trouble areas are malfunctioning.
The following instructions describe how to conduct the Control the Injection Volume for A/F Sensor operation using the
Techstream.
Connect the Techstream to the DLC3.
1.
Start the engine and turn the Techstream on.
2.
Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor.
4.
Perform the Active Test operation with the engine in an idling condition (press the RIGHT or LEFT button to change the fuel
injection volume).
5.
HINT:
INJECTION VOLUME
STATUS
VOLTAGE
AFS Voltage B1S1 or AFS Voltage B2S1
(A/F)
+12.5%
Rich
Below 3.1 V
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0136-P0139,...
TECHSTREAM DISPLAY (SENSOR)
INJECTION VOLUME
STATUS
VOLTAGE
AFS Voltage B1S1 or AFS Voltage B2S1
(A/F)
-12.5%
Lean
Higher than 3.4 V
O2S B1S2 or O2S B2S2
(HO2)
+12.5%
Rich
Higher than 0.55 V
O2S B1S2 or O2S B2S2
(HO2)
-12.5%
Lean
Below 0.4 V
NOTICE:
CASE
A/F SENSOR (SENSOR 1) OUTPUT VOLTAGE
HO2 SENSOR (SENSOR 2) OUTPUT VOLTAGE
MAIN SUSPECTED
TROUBLE AREA
1
-
2
A/F
sensor
A/F
sensor
heater
A/F
sensor
circuit
3
HO2
sensor
HO2
sensor
heater
HO2
sensor
circuit
4
Injector
Fuel
pressure
Gas leak
from
exhaust
system
(Air-fuel
ratio
extremely
rich or
lean)
HINT:
A
To display the graph, enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for
A/F Sensor / Data List / AFS Voltage B1S1 and O2S B1S2 or AFS Voltage B2S1 and O2S B2S2.
Read freeze frame data using the Techstream. Freeze frame data records the engine condition when malfunctions are
detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine
was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.
If the OX1B wire from the ECM connector is short-circuited to the +B wire, DTC P0136 will be set.
If the OX2B wire from the ECM connector is short-circuited to the +B wire, DTC P0156 will be set.
Bank 1 refers to the bank that includes the No. 1 cylinder*.
*: The No. 1 cylinder is the cylinder which is farthest from the transmission.
Bank 2 refers to the bank that does not include the No. 1 cylinder.
Sensor 1 refers to the sensor closest to the engine assembly.
Sensor 2 refers to the sensor farthest away from the engine assembly.
PROCEDURE
1.
READ OUTPUT DTC
(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 / Trouble Codes.
(e) Read DTCs.
Result
RESULT
PROCEED TO
P0138 or P0158 is output
A
P0137 or P0157 is output
B
P0136 or P0156 is output
C
P0139, P013A, P013C or P0159 is output
D
P0136, P0137, P0138, P0156, P0157 or P0158 and other DTCs are output
E
B
GO TO STEP 8
C
GO TO STEP 4
D
GO TO STEP 21
E
GO TO DTC CHART
2.
INSPECT HEATED OXYGEN SENSOR (CHECK FOR SHORT)
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0136-P0139,...
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