Toyota Venza manuals

Toyota Venza: Transmission Fluid Pressure Sensor / Switch "E" Circuit Low (P0989,P0990)

Toyota Venza Service Manual / U660e Automatic Transmission / Transaxle / Automatic Transaxle System / Transmission Fluid Pressure Sensor / Switch "E" Circuit Low (P0989,P0990)

DESCRIPTION

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

DTC No.

DTC Detection Condition

Trouble Area

P0989

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

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

P0990

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

  • Transmission fluid pressure switch No. 3 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: Transmission fluid pressure switch No. 3 OFF malfunction

P0990: Transmission fluid pressure switch No. 3 ON malfunction

Required sensors/Components

Transmission fluid pressure switch No. 3

Frequency of operation

Continuous

Duration

P0989: 1.8 sec.

P0990 (a): 1.2 sec.

P0990 (b): 0.6 sec.

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 (Turbine speed sensor circuit)

P0791, P0793 (Intermediate shaft speed sensor 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)

ECT (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

Turbine speed sensor circuit

No circuit malfunction

Intermediate shaft speed sensor 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

15.5 mph (25 km/h) or more

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

3.304 to 7.724

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

1.901 to 2.340

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

1.399 to 1.649

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

0.998 to 1.138

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

0.705 to 0.836

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

0.568 to 0.695

P0989:

TCM lock-up command

ON

Engine speed - Turbine speed

Less than 35 rpm

Throttle valve opening angle

7% or more

Vehicle speed

Less than 62.1 mph (100 km/h)

Shift solenoid valve SLU

Not ON malfunction

P0990:

TCM indicated pressure valve of SLU

Less than 4 kPa

TCM lock-up command

OFF

Shift solenoid valve SLU

Not malfunction

Shift solenoid valve SL

Not OFF malfunction

TYPICAL MALFUNCTION THRESHOLDS

P0989:

Transmission fluid pressure switch No. 3

OFF

P0990:

Following conditions are met

(a) and (b)

(a) Engine speed - Turbine speed

35 rpm or more

(b) Transmission fluid pressure switch No. 3

ON

WIRING DIAGRAM


CAUTION / NOTICE / HINT

NOTICE:

Perform the universal trip to clear permanent DTCs (See page ).


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.

Display (DTC Output)

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.

CHECK TRANSMISSION WIRE (SHORT TO GROUND)

(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


OK

REPLACE TCM


NG

3.

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

(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

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

Always

10 kΩ or higher


OK

REPLACE TRANSMISSION WIRE


NG

REPLACE ATF TEMPERATURE SENSOR ASSEMBLY

4.

CHECK 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) TCM side - 1 (TPS3) sensor side

Always

Below 1 Ω

1 (TPS3) sensor side - Body ground (Valve body assembly) or other terminals

Always

10 kΩ or higher

Text in Illustration

*1

Front view of wire harness connector

(to TCM)

*2

Front view of wire harness connector

(to ATF Temperature Sensor Assembly)


NG

REPLACE TRANSMISSION WIRE


OK

5.

REPLACE ATF TEMPERATURE SENSOR ASSEMBLY

(a) (See page ).



NEXT

6.

CHECK IF DTC OUTPUT RECURS

(a) Connect the Techstream to the DLC3.

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

(c) Enter the following menus: / ECT / DTC / Clear.

HINT:

Write down the currently output DTCs before clearing them.

(d) Perform the monitor drive pattern (See page ).


(e) Enter the following menus: / ECT / DTC.

(f) Read the DTCs using the Techstream.

Display (DTC Output)

Proceed to

Only "P0989" is output

A

No output

B


A

REPLACE TCM


B

END

Pressure Control Solenoid "C" Electrical (Shift Solenoid Valve SL3) (P0798)
DESCRIPTION Changing from 1st to 6th is performed by the TCM turning shift solenoid valves SL1, SL2, SL3, SL4 and SL on and off. If an open or short circuit occurs in any of the shift solenoid va ...

Pressure Control Solenoid "C" Performance (Shift Solenoid Valve SL3) (P0796)
SYSTEM DESCRIPTION The TCM uses the vehicle speed signal and signals from the transmission speed sensors (NC, NT) to detect the actual gear (1st, 2nd, 3rd, 4th, 5th or 6th gear). Then the TCM comp ...

Other materials about Toyota Venza:

Dtc Check / Clear
DTC CHECK / CLEAR 1. CHECK DTC (a) Turn the ignition switch off. (b) Connect the Techstream to the DLC3. (c) Turn the ignition switch to ON. (d) Turn the Techstream on. (e) Read the DTCs following the display on the Techstream. Enter the following menu ...

Check CAN Bus Line for Short to GND
DESCRIPTION There may be a short circuit between the CAN bus main wire and GND when there is no resistance between terminals 6 (CANH) and 4 (CG) or 14 (CANL) and 4 (CG) of the DLC3. Symptom Trouble Area No resistanc ...

Precaution
PRECAUTION 1. PRECAUTION FOR DISCONNECTING BATTERY CABLE NOTICE: When disconnecting the cable from the negative (-) battery terminal, initialize the following systems after the cable is reconnected. System See Procedure ...

© 2016-2019 Copyright www.tovenza.com

0.3373