Dtc P0989 Transmission Fluid Pressure Sensor / Switch E Circuit Low

Transmission. Camry. Acv40 Gsv40
U660E Automatic Transaxle. Camry. Acv40 Gsv40

DESCRIPTION

MONITOR DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

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

CHECK TRANSMISSION WIRE (SHORT TO GROUND)

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

CHECK TRANSMISSION WIRE

DTC P0989 Transmission Fluid Pressure Sensor / Switch "E" Circuit Low

DTC P0990 Transmission Fluid Pressure Sensor / Switch "E" Circuit High


DESCRIPTION

ATF pressure switch No. 3 is installed in the lockup solenoid ATF output passage and is used to detect a malfunction in the lockup 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).
  1. ATF temperature sensor assembly (ATF pressure switch No. 3)
  1. Transmission wire
  1. TCM
P0990
When both of the following are detected (2 trip detection logic):
  1. Transmission fluid pressure switch No. 3 is ON when lock-up does not occur.
  2. 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.

WIRING DIAGRAM


Camry. Acv40 Gsv40.U660E Automatic Transaxle.Automatic Transaxle System. Dtc P0989 Transmission Fluid Pressure Sensor / Switch E Circuit Low


INSPECTION PROCEDURE

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

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch on and turn the intelligent tester on.

  1. Enter the following items: "Powertrain / ECT / DTC / Current or Pending".

  1. Read the DTCs using the intelligent tester.

    Result:

    Display (DTC output)
    		Proceed to
    Only "P0990" is output
    		A
    Only "P0989" is output
    		B
    "P0989 or P0990" and other DTCs
    		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)


    Camry. Acv40 Gsv40.U660E Automatic Transaxle.Automatic Transaxle System. Dtc P0989 Transmission Fluid Pressure Sensor / Switch E Circuit Low

  1. Remove the TCM.

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

    Standard resistance:
    Tester Condition
    		Specified Condition
    19 (TPS3) - Body ground (Valve body assembly)
    		10 kΩ or higher


OK
REPLACE TCM
NG


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


    Camry. Acv40 Gsv40.U660E Automatic Transaxle.Automatic Transaxle System. Dtc P0989 Transmission Fluid Pressure Sensor / Switch E Circuit Low

  1. Disconnect the connector from the ATF temperature sensor assembly.

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

    Standard resistance:
    Tester Condition
    		Specified Condition
    5 (TPS3) - Body ground (Valve body assembly)
    		10 kΩ or higher


NG
REPLACE ATF TEMPERATURE SENSOR ASSEMBLY
OK

REPLACE TRANSMISSION WIRE

4.CHECK TRANSMISSION WIRE


    Camry. Acv40 Gsv40.U660E Automatic Transaxle.Automatic Transaxle System. Dtc P0989 Transmission Fluid Pressure Sensor / Switch E Circuit Low

  1. Remove the TCM.

  1. Disconnect the speed sensor connector from the transmission wire.

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

    Standard resistance:
    Tester Condition
    		Specified Condition
    19 (TPS3) - 5 (TPS3)
    		Below 1 Ω
    19 (TPS3) or 5 (TPS3) - Body ground (Valve body assembly)
    		10 kΩ or higher


NG
REPLACE TRANSMISSION WIRE
OK

REPLACE ATF TEMPERATURE SENSOR ASSEMBLY