Toyota Tundra. Manual — part 2835

Fig. 98: Identifying Shift Solenoid Valve S4
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPLACE SHIFT SOLENOID VALVE S4 (See DISASSEMBLY )

OK: REPAIR OR REPLACE NO. 1 TRANSMISSION WIRE (See REMOVAL )

DTC P0985, P0986: SHIFT SOLENOID "E" CONTROL CIRCUIT LOW (SHIFT SOLENOID VALVE
SR); SHIFT SOLENOID "E" CONTROL CIRCUIT HIGH (SHIFT SOLENOID VALVE SR)

DESCRIPTION

Shifting from 1st to 6th is performed in combination with ON and OFF operation of the shift solenoid valves
SL1, SL2, S1, S2, S3, S4 and SR, which are controlled by the ECM. If an open or short circuit occurs in any of
the shift 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 (see FAIL-SAFE
TABLE ).

DTC DETECTION CONDITION TABLE

DTC

Code

DTC Detection Condition

Trouble Area

P0985

ECM detects short in solenoid valve SR circuit 2 times when
solenoid valve SR is operated (1 trip detection logic)



Short in shift solenoid
valve SR circuit



Shift solenoid valve SR



ECM

P0986

ECM detects open in solenoid valve SR circuit 2 times when
solenoid valve SR is not operated (1 trip detection logic)



Open in shift solenoid
valve SR circuit



Shift solenoid valve SR



ECM

2009 Toyota Tundra

2009 TRANSMISSION AB60F Automatic Transaxle - Tundra

MONITOR DESCRIPTION

These DTCs indicate an open or short in the shift solenoid valve SR 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 SR is ON, if its resistance is 8 ohms or less, the ECM determines there is a
short in the shift solenoid valve SR circuit.

When the shift solenoid valve SR is OFF, if its resistance is 100 kohms or more, the ECM determines there is
an open in the shift solenoid valve SR circuit (see FAIL-SAFE TABLE ).

MONITOR STRATEGY

MONITOR STRATEGY TABLE

TYPICAL ENABLING CONDITIONS

All

TYPICAL ENABLING CONDITIONS TABLE

P0985: Range Check (Low Resistance)

TYPICAL ENABLING CONDITIONS TABLE

P0986: Range Check (High Resistance)

TYPICAL ENABLING CONDITIONS TABLE

TYPICAL MALFUNCTION THRESHOLDS

Related DTCs

P0985: Shift solenoid valve SR/Range check (Low
resistance)
P0986: Shift solenoid valve SR/Range check (High
resistance)

Required sensors/Components

Shift solenoid valve SR

Frequency of operation

Continuous

Duration

0.128 sec. or more

MIL operation

Immediately

Sequence of operation

None

The monitor will run whenever the following DTCs
are not stored

None

Battery voltage

8 V or higher

Ignition switch

ON

Starter

OFF

Shift solenoid valve SR

ON

Shift solenoid valve SR

OFF

2009 Toyota Tundra

2009 TRANSMISSION AB60F Automatic Transaxle - Tundra

P0985: Range Check (Low Resistance)

TYPICAL MALFUNCTION THRESHOLDS TABLE

P0986: Range Check (High Resistance)

TYPICAL MALFUNCTION THRESHOLDS

COMPONENT OPERATING RANGE

COMPONENT OPERATING RANGE TABLE

WIRING DIAGRAM

Fig. 99: Identifying Shift Solenoid Valve SR - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

HINT:

The shift solenoid valve SR is turned ON/OFF normally when the shift lever is on D:

SHIFT SOLENOID VALVE SR REFERENCE TABLE

1. INSPECT NO. 1 TRANSMISSION WIRE (SHIFT SOLENOID VALVE SR)

Shift solenoid valve SR resistance

8 ohms or less

Shift solenoid valve SR resistance

100 kohms or higher

Shift solenoid valve SR resistance

11 to 15 ohms at 20°C (68°F)

ECM gear shift command

1st

2nd

3rd

4th

5th

6th

Shift solenoid valve SR

ON

ON

ON

ON

OFF

OFF

2009 Toyota Tundra

2009 TRANSMISSION AB60F Automatic Transaxle - Tundra

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 SPECIFIED CONDITION TABLE

Fig. 100: Identifying D63 No. 1 Transmission Wire Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: Go to step 3

OK: Go to next step.

2. CHECK HARNESS AND CONNECTOR (NO. 1 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 SPECIFIED CONDITION TABLE

Result

Tester Connection

Condition

Specified

Condition

6 (SR) - Body ground

20°C (68°F)

11 to 15 ohms

Tester Connection

Condition Specified Condition

D74-4 (SR) - Body ground 20°C (68°F)

11 to 15 ohms

Result

Proceed To

NG

A

2009 Toyota Tundra

2009 TRANSMISSION AB60F Automatic Transaxle - Tundra