Toyota Sequoia (2005). Manual - part 212

ECM command gearshift

Shift solenoid valve S1

1st

2nd

3rd

4th

5th

OFF

OFF

ON

OFF

ON

1

15

2

3

4

5

6

7

8

9

10

11

12

13

14

D11994

Transmission Wire Side:
(Connector Front View):

E1

S1

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

DI–643

837

INSPECTION PROCEDURE

HINT:

The shift solenoid valve S1 is turned on/off normally when the shift lever is in the D position:

1

Check transmission wire.

PREPARATION:
Disconnect the transmission wire connector.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:

Tester Connection

Specified Condition

20



C (68



F)

8 – Body ground

11 to 15 

Ω

NG

Go to step 3.

OK

D14166

ECM:

E8

E7

E6

E5

E4

S1

DI–644

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

838

2

Check harness and connector (Transmission wire – ECM)

PREPARATION:
(a)

Connect the transmission wire connector.

(b)

Disconnect the ECM connector.

CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:

Tester Connection

Specified Condition

20



C (68



F)

E7 – 11 (S1) – Body ground

11 to 15 

Ω

NG

Repair or replace the harness or connector
(See page 

IN–35

).

OK

Replace the ECM (See page 

SF–80

).

D11991

(+)

(–)

Shift Solenoid Valve S1:

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

DI–645

839

3

Check shift solenoid valve S1.

PREPARATION:
Remove the shift solenoid valve S1 (See page 

AT–10

).

CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:

Tester Connection

Specified Condition

20



C (68



F)

Solenoid Connector (S1) – Solenoid

Body (S1)

11 to 15 

Ω

CHECK:
Connect the positive (+) lead to the terminal of the solenoid con-
nector, and the negative (–) lead to the solenoid body.
OK:

The solenoid makes an operating sound.

 

NG

Replace the shift solenoid valve S1
(See page 

AT–10

).

OK

Repair or replace the transmission wire
(See page 

AT–7

).

DI–646

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

840

DTC

P0976

Shift Solenoid ”B” Control Circuit Low
(Shift Solenoid Valve S2)

DTC

P0977

Shift Solenoid ”B” Control Circuit High
(Shift Solenoid Valve S2)

CIRCUIT DESCRIPTION

Shifting from 1st to 5th is performed in combination with ”ON” and ”OFF” operation of the shift solenoid valves
SL1, SL2, S1, S2 and SR which are controlled by the ECM. If an open or short circuit occurs in either of the
shift solenoid valves, the ECM controls the remaining normal shift solenoid valves to allow the vehicle to be
operated smoothly (See page 

DI–567

).

DTC No.

DTC Detection Condition

Trouble Area

P0976

ECM detects short in solenoid valve S2 circuit 2 times when

solenoid valve S2 is operated (1–trip detection logic)

Short in shift solenoid valve S2 circuit

Shift solenoid valve S2

ECM

P0977

ECM detects open in solenoid valve S2 circuit 2 times when

solenoid valve S2 is not operated (1–trip detection logic)

Open in shift solenoid valve S2 circuit

Shift solenoid valve S2

ECM

MONITOR 

DESCRIPTION

These DTCs indicate an open or short in the shift solenoid valve S2 circuit. When there is an open or short
circuit in any shift solenoid valve circuit, the ECM detects the problem and illuminates the MIL and stores
the DTC. When the shift solenoid valve S2 is on, if resistance is 8 

Ω

 or less, the ECM determines there is

a short in the shift solenoid valve S2 circuit.
When the shift solenoid valve S2 is off, if resistance is 100 k

Ω

 or more, the ECM determines there is an open

in the shift solenoid valve S2 circuit (See page 

DI–567

).

MONITOR STRATEGY

R l t d DTC

P0976

Shift solenoid valve S2/Range check (Low resistance)

Related DTCs

P0977

Shift solenoid valve S2/Range check (High resistance)

Required sensors/Components

Shift solenoid valve S2

Frequency of operation

Continuous

Duration

0.064 sec.

MIL operation

Immediate

Sequence of operation

None

DIDJJ–01