Toyota Tundra (2015 year). Manual — part 1886
A
2.
CHECK TERMINAL VOLTAGE (+B OF HO2 SENSOR)
(a) Disconnect the D31 or D32 HO2 sensor 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
D31-2 (+B) - Body
ground
Ignition switch ON
11 to 14 V
D32-2 (+B) - Body
ground
Ignition switch ON
11 to 14 V
Result
RESULT
PROCEED TO
NG
A
OK
B
B
GO TO STEP 5
3.
INSPECT INTEGRATION RELAY (EFI)
(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.
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0037,P0038...
OK
(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
When no battery voltage
applied to terminals 1B-2 and
1B-3
10 kΩ or higher
When 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)
(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 D31 or D32 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
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0037,P0038...
OK
OK
CHECK ECM POWER SOURCE CIRCUIT
5.
CHECK HARNESS AND CONNECTOR (HO2 SENSOR - ECM)
(a) Disconnect the D31 or D32 HO2 sensor 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
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) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
(h) Read the output pending DTCs.
Result
RESULT
PROCEED TO
No DTC is output
A
P0037, P0038, P0057, P0058, P0141, P0161, P102D and/or P105D are output
B
B
REPLACE ECM
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0037,P0038...
A
CHECK FOR INTERMITTENT PROBLEMS
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0037,P0038...
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