Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VILM
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 - 08/2016]
Title: U660E (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: P0989,P0990; Transmission Fluid Pressure Sensor / Switch "E" Circuit Low; 2016 MY Sienna [12/2015 - 08/2016]

DTC

P0989

Transmission Fluid Pressure Sensor / Switch "E" Circuit Low

DTC

P0990

Transmission Fluid Pressure Sensor / Switch "E" Circuit High

DESCRIPTION

No. 3 ATF pressure switch is installed in the lock-up solenoid automatic transmission fluid (ATF) output passage and is used to detect a malfunction in the lock-up solenoid.

DTC No.

DTC Detection Condition

Trouble Area

P0989

No. 3 ATF pressure switch is OFF when lock-up occurs in response to a lock-up request (2 trip detection logic).

  • ATF temperature sensor assembly (No. 3 ATF pressure switch)
  • Transmission wire
  • TCM

P0990

When both of the following are detected (2 trip detection logic):

  • No. 3 ATF pressure switch is ON when lock-up does not occur.
  • Lock-up does not occur when shift solenoid valve (SLU) is requested to turn off in the lock-up range.

MONITOR DESCRIPTION

The TCM illuminates the MIL and stores the DTC when the TCM detects that the ATF pressure switch is OFF with the lock-up solenoid ON or when the TCM detects that the ATF pressure switch is ON with the lock-up solenoid OFF.

MONITOR STRATEGY

Related DTCs

P0989: No. 3 ATF pressure switch OFF malfunction

P0990: No. 3 ATF pressure switch ON malfunction

Required sensors/Components

No. 3 ATF pressure switch

Frequency of operation

Continuous

Duration

P0989: 1.8 seconds

P0990 (a): 1.2 seconds

P0990 (b): 0.6 seconds

MIL operation

2 driving cycles

Sequence of operation

None

TYPICAL ENABLING CONDITIONS

ALL:

The monitor will run whenever this DTC is not present.

(Not circuit malfunction)

P0712, P0713 (ATF temperature sensor circuit (TFT sensor))

P0115, P0117, P0118 (ECT sensor circuit)

P0715, P0717 (Input speed sensor (NT) circuit)

P0791, P0793 (Output speed sensor (NC) circuit)

P0748 (Shift solenoid valve SL1 circuit)

P0778 (Shift solenoid valve SL2 circuit)

P0798 (Shift solenoid valve SL3 circuit)

P2810 (Shift solenoid valve SL4 circuit)

P2759 (Shift solenoid valve SLU circuit)

P2769, P2770 (Shift solenoid valve SL circuit)

P0327, P0328, P0332, P0333 (KCS sensor circuit)

P0120, P0121, P0122, P0123, P0220, P0222, P0223, P0604, P0606, P060A, P060B, P060D, P060E, P0657, P1607, P2102, P2103, P2111, P2112, P2118, P2119, P2135 ((ETCS) Electronic throttle control system)

U0100 (CAN communication system)

Engine coolant temperature

40°C (104°F) or more

Spark advance from Max. retard timing by KCS control

0°CA or more

Transmission range

D

TFT (Transmission fluid temperature)

-10°C (14°F) or more

TFT (Transmission fluid temperature) sensor circuit

No circuit malfunction

ECT (Engine coolant temperature) sensor circuit

No circuit malfunction

Input speed sensor (NT) circuit

No circuit malfunction

Output speed sensor (NC) circuit

No circuit malfunction

Shift solenoid valve SL1 circuit

No circuit malfunction

Shift solenoid valve SL2 circuit

No circuit malfunction

Shift solenoid valve SL3 circuit

No circuit malfunction

Shift solenoid valve SL4 circuit

No circuit malfunction

Shift solenoid valve SLU circuit

No circuit malfunction

Shift solenoid valve SL circuit

No circuit malfunction

KCS (Knock control sensor circuit)

No circuit malfunction

(ETCS) Electronic throttle control system

Not system down

CAN communication system

Not system down

Engine

Starting

TCM selected gear

Not 1st

Vehicle speed

25 km/h (15.5 mph) or more

Input speed (NT) / Output speed (NO) with 1st

3.304 to 7.724

Input speed (NT) / Output speed (NO) with 2nd

1.901 to 2.340

Input speed (NT) / Output speed (NO) with 3rd

1.399 to 1.649

Input speed (NT) / Output speed (NO) with 4th

0.998 to 1.138

Input speed (NT) / Output speed (NO) with 5th

0.705 to 0.836

Input speed (NT) / Output speed (NO) with 6th

0.568 to 0.695

P0989:

TCM lock-up command

ON

(SLU pressure: 513 kPa (5.2 kgf/ cm2, 74 psi) or more

Engine speed (NE) - Input speed (NT)

Less than 35 rpm

Throttle valve opening angle

7% or more

Vehicle speed

Less than 120 km/h (74.6 mph)

Shift solenoid valve SLU

Not ON malfunction

P0990:

TCM indicated pressure valve of SLU

0 kPa

TCM lock-up command

OFF

(SLU pressure: less than 4 kPa (0.04 kgf/ cm2, 0.6 psi)

Shift solenoid valve SLU

Not malfunction

Shift solenoid valve SL

Not OFF malfunction

TYPICAL MALFUNCTION THRESHOLDS

P0989:

No. 3 transmission fluid pressure switch

OFF

P0990:

Following conditions are met

(a) and (b)

(a) l Engine speed (NE) - Input speed (NT) l

35 rpm or more

(b) No. 3 transmission fluid pressure switch

ON

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Perform the universal trip to clear permanent DTCs (See page 2016 MY Sienna [12/2015 - 08/2016]; U660E (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: DTC CHECK / CLEAR ).

PROCEDURE

1.

CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0989 OR P0990)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / ECT / Trouble Codes.

(e) Read the DTCs using the Techstream.

Result

Result

Proceed to

Only P0990 is output

A

Only P0989 is output

B

P0989 or P0990 and other DTCs are output

C

HINT:

If a solenoid is stuck OFF, DTCs for several solenoids including the malfunctioning solenoid will be detected.

B

GO TO STEP 4

C

GO TO DTC CHART

A

2.

INSPECT TRANSMISSION WIRE (NO. 3 ATF PRESSURE SWITCH)

(a) Remove the TCM.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

19 (TPS3) - Body ground (Valve body assembly) or other terminals

Always

10 kΩ or higher

Text in Illustration

*a

Component without harness connected:

(Transmission Wire)

OK

REPLACE TCM

NG

3.

INSPECT ATF TEMPERATURE SENSOR ASSEMBLY (NO. 3 ATF PRESSURE SWITCH)

(a) Remove the oil strainer assembly.

(b) Disconnect the connector from the ATF temperature sensor assembly.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

5 (TPS3) - Body ground (Valve body assembly) or other terminals

Always

10 kΩ or higher

Text in Illustration

*a

Component without harness connected:

(ATF Temperature Sensor)

OK

REPLACE TRANSMISSION WIRE

NG

REPLACE ATF TEMPERATURE SENSOR ASSEMBLY

4.

INSPECT TRANSMISSION WIRE

(a) Remove the oil strainer assembly.

(b) Remove the TCM.

(c) Disconnect the connector from the ATF temperature sensor assembly.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

19 (TPS3) - 5 (TPS3)

Always

Below 1 Ω

5 (TPS3) - Body ground (Valve body assembly) or other terminals

Always

10 kΩ or higher

Text in Illustration

*a

Component without harness connected:

(Transmission Wire)

*b

TCM Side:

*c

ATF Temperature Sensor Side:

NG

REPLACE TRANSMISSION WIRE

OK

5.

REPLACE ATF TEMPERATURE SENSOR ASSEMBLY

(a) Replace ATF temperature sensor (See page 2016 MY Sienna [12/2015 - 08/2016]; U660E (AUTOMATIC TRANSMISSION / TRANSAXLE): ATF TEMPERATURE SENSOR(When Not Using the Engine Support Bridge): REMOVAL ).

NEXT

6.

CHECK DTC OUTPUT

(a) Connect the Techstream to the DLC3.

(b) Start the engine and turn the Techstream on.

(c) Enter the following menus: Powertrain / ECT / Trouble Codes / Clear.

HINT:

Write down the currently output DTCs before clearing them.

(d) Perform the monitor drive pattern (See page 2016 MY Sienna [12/2015 - 08/2016]; U660E (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: MONITOR DRIVE PATTERN ).

(e) Enter the following menus: Powertrain / ECT / Trouble Codes.

(f) Read the DTCs using the Techstream.

Result

Result

Proceed to

DTC not output

A

Only P0989 is output

B

A

END

B

REPLACE TCM