Toyota Tundra (2015 year). Manual — part 698
OK
1.
INSPECT NO. 1 TRANSMISSION WIRE (SHIFT SOLENOID VALVE SL1)
(a) Disconnect the D63 No. 1 transmission wire connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
11 (SL1+) - 3 (SL1-)
20°C (68°F)
5.0 to 5.6 Ω
11 (SL1+) - Body ground
Always
10 kΩ or higher
3 (SL1-) - Body ground
Always
10 kΩ or higher
NG
GO TO STEP 3
2.
CHECK HARNESS AND CONNECTOR (NO. 1 TRANSMISSION WIRE - ECM)
AB60F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMIS...
(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
D74-14 (SL1+) - D74-15
(SL1-)
20°C
(68°F)
5.0 to 5.6 Ω
D74-14 (SL1+) - Body ground
Always
10 kΩ or higher
D74-15 (SL1-) - Body ground
Always
10 kΩ or higher
Result
RESULT
PROCEED TO
NG
A
OK (for 3UR-FE)
B
OK (for 3UR-FBE)
C
B
REPLACE ECM
C
REPLACE ECM
A
REPAIR OR REPLACE HARNESS OR CONNECTOR
3.
INSPECT SHIFT SOLENOID VALVE SL1
AB60F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMIS...
(a) Remove shift solenoid valve SL1.
(b) Measure the resistance according to the value(s) in the table
below.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
1 - 2
20°C (68°F)
5.0 to 5.6 Ω
(c) Connect the battery's positive (+) lead with a 21 W bulb to
Valve moves and makes an operating noise.
NG
REPLACE SHIFT SOLENOID VALVE SL1
OK
REPAIR OR REPLACE NO. 1 TRANSMISSION WIRE
AB60F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMIS...
Last Modified: 9-16-2014
6.6 C
Doc ID: RM000000W8J0DYX
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: AB60F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION SYSTEM: P0751; Shift Solenoid "A"
Performance (Shift Solenoid Valve S1); 2015 MY Tundra [08/2014 - ]
DTC
P0751
Shift Solenoid "A" Performance (Shift Solenoid Valve S1)
DESCRIPTION
The ECM uses signals from the output shaft speed sensor and input speed sensor to detect the actual gear
position (1st, 2nd, 3rd, 4th, 5th or 6th gear).
Then the ECM compares the actual gear with the shift schedule in the ECM memory to detect mechanical
CODE
DTC DETECTION CONDITION
TROUBLE AREA
P0751
S1 stuck ON malfunction*1:
The ECM determines there is a malfunction when the
following conditions are both met. (2-trip detection
logic)
(a) When the ECM directs the transmission to switch to 1st
gear, the actual gear is shifted to 2nd.
(b) When the ECM directs the transmission to switch to 5th
gear, the actual gear is also shifted to 5th.
Shift solenoid valve S1
remains closed
Valve body is blocked
Automatic transmission
(clutch, brake or gear, etc.)
P0751
S1 stuck OFF malfunction*2:
The ECM determines there is a malfunction when
conditions (a) and (b) are met. (2-trip detection logic)
(a) When the ECM directs the transmission to switch to 5th
gear, the actual gear is also shifted to 5th.
(b) When the ECM directs the transmission to switch to 6th
gear, the engine overruns (clutch slips).
Shift solenoid valve S1
remains open
Shift solenoid valve SLT
remains open or closed
Valve body is blocked
No. 2 brake malfunction
(Driving is difficult.)
Automatic transmission
(clutch, brake or gear, etc.)
HINT:
1st
2nd
3rd
4th
5th
6th
*1: Actual gear position under S1 stuck ON malfunction
2nd
2nd
3rd
4th
5th
6th
*2: Actual gear position under S1 stuck OFF malfunction
1st
1st
3rd
4th
5th
N*
N*: Neutral
Gear position during fail-safe operation:
If any malfunction is detected, the ECM changes into the fail-safe mode to shift into the gear
positions as shown in the table below.
AB60F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMIS...
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