Automatic Transmission - U660F

U660F AUTOMATIC TRANSMISSION / TRANSAXLE: AUTOMATIC TRANSAXLE SYSTEM: P0989,P0990: Transmission Fluid Pressure Sensor / Switch "E" Circuit Low
P0990 - Transmission Fluid Pressure Sensor / Switch "E" Circuit High

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.

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

TYPICAL ENABLING CONDITIONS

ALL:

All:

P0989:

P0989::

P0990:

P0990::

TYPICAL MALFUNCTION THRESHOLDS

P0989:

P0989::

P0990:

P0990::

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:
Perform the universal trip to clear permanent DTCs 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:

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

C -- GO TO DTC CHART Automatic Transaxle System - U660F

B -- CHECK TRANSMISSION WIRE
A -- Continue to next step.

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:

Result:

B -- REPLACE TCM Removal
A -- Continue to next step.

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.

NG -- REPLACE ATF TEMPERATURE SENSOR ASSEMBLY Removal

OK -- REPLACE TRANSMISSION WIRE Removal

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:

Text in Illustration

Text in Illustration:

NG -- REPLACE TRANSMISSION WIRE Removal
OK -- Continue to next step.

5. REPLACE ATF TEMPERATURE SENSOR ASSEMBLY

(a) Removal.

NEXT -- Continue to next step.

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 Monitors, Trips, Drive Cycles and Readiness Codes.

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

(f) Read the DTCs using the Techstream.

Result:

B -- END

A -- REPLACE TCM Removal