Toyota Tundra (2015 year). Manual — part 1683
OK
OK
TESTER
CONNECTION
CONDITION
SPECIFIED
CONDITION
1C-1 - 1B-4
When battery voltage is
applied to terminals 1B-2 and
1B-3
Below 1 Ω
NG
REPLACE INTEGRATION RELAY
3.
CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)
(a) Disconnect the D74 ECM connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
D74-81 (E1) - Body ground
Always
Below 1 Ω
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
4.
INSPECT ECM (IGSW VOLTAGE)
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: ECM Power...
(a) Disconnect the A24 and D74 ECM connectors.
(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
A24-28 (IGSW) - D74-81
(E1)
Ignition switch ON
11 to 14 V
NG
GO TO STEP 5
OK
REPLACE ECM
5.
CHECK HARNESS AND CONNECTOR (RELAY BLOCK - ECM, IGNITION SWITCH,
BATTERY AND BODY GROUND)
(a) Disconnect the A24 ECM connector.
(b) Disconnect the J9 ignition switch connector.
(c) Disconnect the cable from the battery positive (+) terminal.
(d) Remove the AM2 fuse and integration relay.
(e) Measure the resistance according to the value(s) in the table below.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
A24-28 (IGSW) - 1B-8
Always
Below 1 Ω
1B-7 - Body ground
Always
Below 1 Ω
Positive (+) battery cable - 1C-1
Always
Below 1 Ω
Positive (+) battery cable - AM2 fuse terminal 1
Always
Below 1 Ω
J9-5 (AM2) - AM2 fuse terminal 2
Always
Below 1 Ω
J9-6 (IG2) - 1B-6
Always
Below 1 Ω
A24-28 (IGSW) or 1B-8 - Body ground
Always
10 kΩ or higher
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: ECM Power...
OK
OK
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
Positive (+) battery cable or AM2 fuse terminal 1 - Body ground
Always
10 kΩ or higher
Positive (+) battery cable or 1C-1 - Body ground
Always
10 kΩ or higher
J9-5 (AM2) or AM2 fuse terminal 2 - Body ground
Always
10 kΩ or higher
J9-6 (IG2) or 1B-6 - Body ground
Always
10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
6.
INSPECT IGNITION SWITCH
(a) Inspect the ignition switch
.
NG
REPLACE IGNITION SWITCH
7.
CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY - ECM, BATTERY AND
BODY GROUND)
(a) Disconnect the A24 ECM connector.
(b) Disconnect the cable from the battery positive terminal.
(c) Remove the integration relay from the engine room relay block.
(d) Disconnect the integration relay connector.
(e) Measure the resistance according to the value(s) in the table below.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
A24-3 (+B) - 1B-4
Always
Below 1 Ω
A24-2 (+B2) - 1B-4
Always
Below 1 Ω
A24-34 (MREL) - 1B-2
Always
Below 1 Ω
1C-1 - Positive (+) battery cable
Always
Below 1 Ω
1B-3 - Body ground
Always
Below 1 Ω
A24-3 (+B) or 1B-4 - Body ground
Always
10 kΩ or higher
A24-2 (+B2) or 1B-4 - Body ground
Always
10 kΩ or higher
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: ECM Power...
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
A24-34 (MREL) or 1B-2 - Body ground
Always
10 kΩ or higher
1C-1 or Positive (+) battery cable - Body ground
Always
10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPAIR OR REPLACE ENGINE ROOM RELAY
BLOCK
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: ECM Power...
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