Toyota Tundra (2015 year). Manual — part 1113
OK
(a) Remove the integration relay from the engine room relay
block.
(b) Inspect the EFI NO. 1 fuse.
(1) Remove the EFI NO. 1 fuse from the integration relay.
(2) Measure the resistance according to the value(s) in the
table below.
Standard Resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
EFI NO. 1 fuse
Always
Below 1 Ω
(3) Reinstall the EFI NO. 1 fuse.
(c) Inspect the EFI relay.
(1) Measure the resistance according to the value(s) in the
table below.
Standard Resistance:
TESTER
CONNECTION
CONDITION
SPECIFIED
CONDITION
1C-1 - 1B-4
No battery voltage applied to
terminals 1B-2 and 1B-3
10 kΩ or higher
Battery voltage applied to
terminals 1B-2 and 1B-3
Below 1 Ω
NG
REPLACE INTEGRATION RELAY (EFI)
4.
CHECK HARNESS AND CONNECTOR (HO2 SENSOR - INTEGRATION RELAY)
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0037,P0038,...
(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 HO2 sensor 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
D31-2 (+B) - 1B-4
Always
Below 1 Ω
D32-2 (+B) - 1B-4
Always
Below 1 Ω
D31-2 (+B) or 1B-4 - Body
ground
Always
10 kΩ or higher
D32-2 (+B) or 1B-4 - Body
ground
Always
10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
CHECK ECM POWER SOURCE CIRCUIT
5.
CHECK HARNESS AND CONNECTOR (HO2 SENSOR - ECM)
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0037,P0038,...
OK
(a) Disconnect the HO2 sensor connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table
below.
Standard Resistance:
TESTER CONNECTION
CONDITION
SPECIFIED
CONDITION
D31-1 (HT1B) - D74-45 (HT1B)
Always
Below 1 Ω
D32-1 (HT2B) - D74-44 (HT2B)
Always
Below 1 Ω
D31-1 (HT1B) or D74-45 (HT1B) -
Body ground
Always
10 kΩ or higher
D32-1 (HT2B) or D74-44 (HT2B) -
Body ground
Always
10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
6.
CHECK WHETHER DTC OUTPUT RECURS
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Clear DTCs
.
(e) Start the engine.
(f) Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.
(g) Read the output pending DTCs using the Techstream.
Result
RESULT
PROCEED TO
No pending DTC is output
A
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0037,P0038,...
RESULT
PROCEED TO
Pending DTC P0037, P0038, P0057, P0058, P0141, P0161, P102D and/or P105D is output
B
B
REPLACE ECM
A
CHECK FOR INTERMITTENT PROBLEMS
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0037,P0038,...
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