DTC P0989: Transmission Fluid Pressure Sensor / Switch "E" Circuit Low; DTC P0990: Transmission Fluid Pressure Sensor / Switch "E" Circuit High [10/2015 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / ECT / Trouble Codes.
5. Read the DTCs using the Techstream.

   Result

   Display (DTC Output)	Proceed to
   Only DTC P0990 is output	A
   Only DTC P0989 is output	B
   DTC 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.

Result: 

B 

See step  4

Result: 

C 

GO TO DTC CHART 

(Refer to DIAGNOSTIC TROUBLE CODE CHART [10/2015 - ] )

Result: 

A 

See step  2

1. Remove the TCM.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. 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) and other terminals	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Transmission Wire)

Result: 

OK 

REPLACE TCM 

(Refer to COMPONENTS [10/2014 - ] )

Result: 

NG 

See step  3

1. Remove the oil strainer assembly.
2. Disconnect the connector from the ATF temperature sensor assembly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

3. 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) and other terminals	Always	10 kΩ or higher

Result: 

OK 

REPLACE TRANSMISSION WIRE 

(Refer to COMPONENTS [10/2014 - ] )

Result: 

NG 

REPLACE ATF TEMPERATURE SENSOR ASSEMBLY 

(Refer to COMPONENTS [10/2014 - ] )

1. Remove the oil strainer assembly.
2. Remove the TCM.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

3. Disconnect the connector from the ATF temperature sensor assembly.
4. 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) and 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

Result: 

NG 

REPLACE TRANSMISSION WIRE 

(Refer to COMPONENTS [10/2014 - ] )

Result: 

OK 

See step  5

(Refer to COMPONENTS [10/2014 - ] )

Result: 

NEXT 

See step  6

1. Connect the Techstream to the DLC3.
2. Start the engine and turn the Techstream on.
3. Clear the DTCs (Refer to DTC CHECK / CLEAR [10/2014 - ] ).

   HINT: 

   Write down the currently output DTCs before clearing them.

4. Perform the monitor drive pattern (Refer to MONITOR DRIVE PATTERN [10/2014 - ] ).
5. Enter the following menus: Powertrain / ECT / Trouble Codes.
6. Read the DTCs using the Techstream.

   Result

   Display (DTC Output)	Proceed to
   Only DTC P0989 is output	A
   No output	B

Result: 

A 

REPLACE TCM 

(Refer to COMPONENTS [10/2014 - ] )

Result: 

B 

END