Toyota Tundra (2015 year). Manual — part 1889
Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
13.
Input the DTC: P0102 or P0103.
14.
Check the DTC judgment result.
TESTER
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 INCOMPLETE or N/A, perform steps [B] and [C] again.
15.
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.
16.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0102,P0103...
A
procedure.
HINT:
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.
PROCEDURE
1.
READ DTC OUTPUT
(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 / Trouble Codes.
(e) Read DTCs.
Result
RESULT
PROCEED TO
DTC P0102 is output
A
DTC P0103 is output
B
B
GO TO STEP 6
2.
INSPECT MASS AIR FLOW METER (POWER SOURCE VOLTAGE)
(a) Disconnect the D7 MAF meter connector.
(b) Turn the ignition switch to ON.
(c) Measure the voltage according to the value(s) in the
table below.
Standard voltage:
TESTER CONNECTION
SWITCH
CONDITION
SPECIFIED
CONDITION
D7-1 (+B) - Body
ground
Ignition switch ON
11 to 14 V
NG
GO TO STEP 5
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0102,P0103...
OK
OK
3.
CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM)
(a) Disconnect the D7 MAF meter connector.
(b) Disconnect the D74 ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
D7-3 (VG) - D74-74 (VG)
Always
Below 1 Ω
D7-2 (E2G) - D74-75 (E2G)
Always
Below 1 Ω
D7-3 (VG) or D74-74 (VG) - Body ground
Always
10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
4.
INSPECT MASS AIR FLOW METER
(a) Inspect the mass air flow meter, referring to the On-vehicle inspection for mass air flow meter
.
(b) Inspect the mass air flow meter, referring to the inspection for mass air flow meter
.
(2) Turn the ignition switch to ON.
(3) Turn the Techstream on.
(4) Enter the following menus: Powertrain / Engine and ECT / Data List / MAF.
(5) start the engine.
(6) Check that the MAF value changes when the engine is raced.
OK:
The reading changes.
HINT:
Perform "Inspection After Repair" after replacing the mass air flow meter
.
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0102,P0103...
NG
REPLACE MASS AIR FLOW METER
OK
REPLACE ECM
5.
CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - INTEGRATION
RELAY)
(a) Check the EFI NO. 2 fuse.
(1) Remove the EFI NO. 2 fuse from the engine room relay block.
(2) Measure the resistance according to the value(s) in the table below.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
EFI NO. 2 fuse
Always
Below 1 Ω
(3) Reinstall the EFI NO. 2 fuse.
(b) Disconnect the D7 MAF meter connector.
(c) Remove the integration relay from the engine room relay block
.
(d) Measure the resistance according to the value(s) in the table below.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
D7-1 (+B) - 1B-4
Always
Below 1 Ω
D7-1 (+B) or 1B-4 - Body ground
Always
10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
CHECK ECM POWER SOURCE CIRCUIT
6.
CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM)
(a) Disconnect the D7 MAF meter connector.
(b) Disconnect the D74 ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
D7-3 (VG) - D74-74 (VG)
Always
Below 1 Ω
D7-2 (E2G) - D74-75 (E2G)
Always
Below 1 Ω
D7-3 (VG) or D74-74 (VG) - Body ground
Always
10 kΩ or higher
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0102,P0103...
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