Toyota Tundra (2015 year). Manual — part 465

Last Modified: 9-16-2014

6.6 C

Doc ID: RM000000W860ELX

Model Year: 2015

Model: Tundra

Prod Date Range: [08/2014 - ]

Title: A760F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION SYSTEM: P0973,P0974; Shift Solenoid

"A" Control Circuit Low (Shift Solenoid Valve S1); 2015 MY Tundra [08/2014 - ]

DTC

P0973

Shift Solenoid "A" Control Circuit Low (Shift Solenoid Valve S1)

DTC

P0974

Shift Solenoid "A" Control Circuit High (Shift Solenoid Valve S1)

DESCRIPTION

solenoid valves, the ECM controls the remaining normal shift solenoid valves to allow the vehicle to be operated

safely. Also, the ECM stops sending current to the open or short-circuited solenoid

.

DTC

CODE

DTC DETECTION CONDITION

TROUBLE AREA

P0973

ECM detects a short in the solenoid valve S1 circuit 2 times when

solenoid valve S1 is operated (1-trip detection logic).

Short in shift solenoid

valve S1 circuit

Shift solenoid valve S1

ECM

P0974

ECM detects an open in the solenoid valve S1 circuit 2 times when

solenoid valve S1 is not operated (1-trip detection logic).

Open in shift solenoid

valve S1 circuit

Shift solenoid valve S1

ECM

MONITOR DESCRIPTION

These DTCs indicate an open or short in the shift solenoid valve S1 circuit. When there is an open or short circuit

in any shift solenoid valve circuit, the ECM detects the problem, illuminates the MIL and stores the DTC. When

the shift solenoid valve S1 is ON, if its resistance is 8 Ω or less, the ECM determines there is a short in the shift

solenoid valve S1 circuit.

When the shift solenoid valve S1 is OFF, if its resistance is 100 kΩ or more, the ECM determines there is an open

in the shift solenoid valve S1 circuit

.

MONITOR STRATEGY

Related DTCs

P0973: Shift solenoid valve S1/Range check (Low resistance)

P0974: Shift solenoid valve S1/Range check (High resistance)

Required sensors/Components

Shift solenoid valve S1

A760F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISS...

Duration

0.128 seconds or more

MIL operation

Immediately

TYPICAL ENABLING CONDITIONS

All

The monitor will run whenever the following DTCs are not present

None

Battery voltage

8 V or more

Ignition switch

ON

Starter

OFF

P0973: Range Check (Low Resistance)

Command to shift solenoid valve S1

ON

P0974: Range Check (High Resistance)

Command to shift solenoid valve S1

OFF

TYPICAL MALFUNCTION THRESHOLDS

P0973: Range Check (Low Resistance)

Shift solenoid valve S1 resistance

8 Ω or less

P0974: Range check (High Resistance)

Shift solenoid valve S1 resistance

100 kΩ or more

COMPONENT OPERATING RANGE

Shift solenoid valve S1 resistance

11 to 15 Ω at 20°C (68°F)

WIRING DIAGRAM

A760F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISS...

INSPECTION PROCEDURE

NOTICE:

Perform the universal trip to clear permanent DTCs

.

HINT:

The shift solenoid valve S1 is turned ON/OFF normally when the shift lever is in D:

ECM gear shift command

1st

2nd

3rd

4th

5th

6th

Shift solenoid valve S1

OFF

ON

ON

ON

ON

ON

PROCEDURE

1.

INSPECT TRANSMISSION WIRE (SHIFT SOLENOID VALVE S1)

(a) Disconnect the D83 transmission wire connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

TESTER CONNECTION

CONDITION

SPECIFIED CONDITION

A760F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISS...

OK

TESTER CONNECTION

CONDITION

SPECIFIED CONDITION

10 (S1) - Body ground

20°C (68°F)

11 to 15 Ω

Text in Illustration

*a

Component without harness connected

(Transmission Wire)

NG

GO TO STEP 3

2.

CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)

(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

D74-7 (S1) - Body ground

20°C (68°F)

11 to 15 Ω

Text in Illustration

*a

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

REPLACE ECM

3.

INSPECT SHIFT SOLENOID VALVE S1

A760F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISS...