Toyota Tundra (2015 year). Manual — part 1110
OK
(a) Remove the integration relay from the engine room relay
block.
(b) Inspect the A/F fuse.
(1) Remove the A/F 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
A/F fuse
Always
Below 1 Ω
(3) Reinstall the A/F fuse.
(c) Inspect the integration relay (A/F).
(1) Measure the resistance according to the value(s) in the
table below.
Standard Resistance:
TESTER
CONNECTION
CONDITION
SPECIFIED
CONDITION
1C-1 - 1A-4
No battery voltage applied to
terminals 1A-2 and 1A-3
10 kΩ or higher
Battery voltage applied to
terminals 1A-2 and 1A-3
Below 1 Ω
NG
REPLACE INTEGRATION RELAY (A/F)
4.
CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY - A/F SENSOR AND BODY
GROUND)
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0031,P0032,...
(a) Disconnect the A/F sensor connector.
(b) Remove the integration relay from the engine room relay
block.
(c) Measure the resistance according to the value(s) in the table
below.
Standard Resistance:
TESTER CONNECTION
CONDITION
SPECIFIED
CONDITION
D33-2 (+B) - 1A-4
Always
Below 1 Ω
D34-2 (+B) - 1A-4
Always
Below 1 Ω
1A-2 - 1B-5
Always
Below 1 Ω
1A-3 - Body ground
Always
Below 1 Ω
D33-2 (+B) or 1A-4 - Body
ground
Always
10 kΩ or higher
D34-2 (+B) or 1A-4 - Body
ground
Always
10 kΩ or higher
1A-2 or 1B-5 - 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 (A/F SENSOR - ECM)
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0031,P0032,...
OK
(a) Disconnect the A/F 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
D33-1 (HA1A) - D74-22 (HA1A)
Always
Below 1 Ω
D34-1 (HA2A) - D74-20 (HA2A)
Always
Below 1 Ω
D33-1 (HA1A) or D74-22 (HA1A) -
Body ground
Always
10 kΩ or higher
D34-1 (HA2A) or D74-20 (HA2A) -
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: P0031,P0032,...
RESULT
PROCEED TO
Pending DTC P0031, P0032, P0051, P0052, P101D or P103D is output
B
B
REPLACE ECM
A
CHECK FOR INTERMITTENT PROBLEMS
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0031,P0032,...
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