Toyota Tundra (2015 year). Manual — part 1649
A
5.
READ VALUE USING TECHSTREAM (OUTPUT VOLTAGE OF A/F SENSOR)
(a) Connect the Techstream to the DLC3.
(b) Start the engine.
(c) Turn the Techstream on.
Volume for A/F Sensor.
(f) Perform the Control the Injection Volume for A/F Sensor operation with the engine idling.
HINT:
INJECTION VOLUME
STATUS
VOLTAGE
AFS Voltage B1S1 or AFS Voltage B2S1
(Air fuel ratio)
+12.5%
Rich
Below 3.1 V
-12.5%
Lean
Higher than 3.4 V
O2S B1S2 or O2S B2S2
(Heated oxygen)
+12.5%
Rich
Higher than 0.55 V
-12.5%
Lean
Below 0.4 V
Result
STATUS OF AFS VOLTAGE
B1S1 OR AFS VOLTAGE B2S1
STATUS OF O2S B1S2
OR O2S B2S2
AIR FUEL RATIO CONDITION AND AIR
FUEL RATIO SENSOR CONDITION
PROCEED
TO
Lean
Lean
Actual air fuel ratio lean
A
Rich
Rich
Actual air fuel ratio rich
A
Lean
Lean/Rich
Air fuel ratio sensor malfunction
B
Rich
Lean/Rich
Air fuel ratio sensor malfunction
B
Lean/Rich
Lean/Rich
Normal
B
Lean: During the Control the Injection Volume for A/F Sensor Active Test, the air fuel ratio sensor output
voltage (AFS Voltage) is consistently higher than 3.4 V, and the heated oxygen sensor output voltage (O2S)
is consistently below 0.4 V.
Rich: During the Control the Injection Volume for A/F Sensor Active Test, the AFS Voltage is consistently below
3.1 V, and the O2S is consistently higher than 0.55 V.
A
OK
OK
OK
heated oxygen sensor alternates correctly.
HINT:
Refer to "Data List / Active Test" [AFS Voltage B1S1, AFS Voltage B2S1, O2S B1S2 and O2S B2S2]
.
B
GO TO STEP 14
6.
CHECK AIR INDUCTION SYSTEM
(a) Check the air induction system for vacuum leaks
.
OK:
No leaks in air induction system.
NG
REPAIR OR REPLACE AIR INDUCTION SYSTEM
7.
CHECK EXHAUST GAS LEAK
(a) Check for exhaust gas leaks from the exhaust manifold assembly and exhaust pipes.
OK:
No gas leaks.
NG
REPAIR OR REPLACE EXHAUST SYSTEM
8.
CHECK FUEL PRESSURE
(a) Check the fuel pressure
.
NG
GO TO STEP 16
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2195-P219...
OK
NEXT
9.
INSPECT FUEL INJECTOR
(a) Check the fuel injector (whether fuel volume is high or low, and whether injector pattern is
poor)
.
NG
REPLACE FUEL INJECTOR
10.
REPLACE AIR FUEL RATIO SENSOR
(a) Replace the air fuel ratio sensor
.
11.
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 the 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 / Utility / All Readiness.
(j) Input the DTC: P2195, P2196, P2197 or P2198.
(k) Check the DTC judgment result.
Result
RESULT
PROCEED TO
ABNORMAL (DTC P2195, P2196, P2197 or P2198 is output)
A
NORMAL (DTC is not output)
B
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2195-P219...
A
NEXT
B
END
12.
REPLACE ECM
(a) Replace the ECM
.
13.
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Clear the DTC
.
(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 / Utility / All Readiness.
(j) Input the DTC: P2195, P2196, P2197 or P2198.
(k) Check the DTC judgment result.
Result
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
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2195-P219...
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