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Diagnosis Procedure

CHECK CAN COMMUNICATION LINE
Perform the self-diagnosis. Refer to "CONSULT-III FUNCTION (TRANSMISSION) ".

Is any malfunction of the "U1000 CAN COMM CIRCUIT" indicated?

YES: Check CAN communication line. Refer to DTC U1000 CAN COMMUNICATION LINE .

NO: GO TO 2.

CHECK INPUT SIGNALS

With CONSULT-III

Start engine.
Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
Start vehicle and read out the value of "SEC HYDR SEN".

ITEM NAME VALUE CHART

Item name	Condition	Display value (Approx.)
SEC HYDR SEN	"N" position idle	1.0 V

Without CONSULT-III

Start engine.
Check voltage between TCM connector terminals and ground.

CONNECTOR TERMINAL VOLTAGE CHART

Name	Connector	Terminal	Condition	Voltage (Approx.)
Transmission fluid pressure sensor A (Secondary pressure sensor)	F23	15 - Ground	"N" position idle	1.0 V

OK or NG

OK: GO TO 6.

NG: GO TO 3.

CHECK LINE PRESSURE
Perform line pressure test. Refer to "INSPECTIONS BEFORE TROUBLE DIAGNOSIS ".

OK or NG

OK: GO TO 4.

NG: Repair or replace damaged parts. Refer to "INSPECTIONS BEFORE TROUBLE DIAGNOSIS ".
CHECK TRANSMISSION FLUID PRESSURE SENSOR A (SECONDARY PRESSURE SENSOR) SYSTEM
Check transmission fluid pressure sensor A (secondary pressure sensor) system. Refer to DTC P0840 TRANSMISSION FLUID PRESSURE SENSOR A CIRCUIT (SEC PRESSURE SENSOR) .

OK or NG

OK: GO TO 5.

NG: Repair or replace damaged parts.
DETECT MALFUNCTIONING ITEM
Check the following:
- Pressure control solenoid valve A (Line pressure solenoid valve). Refer to "COMPONENT INSPECTION ".
- Pressure control solenoid valve B (Secondary pressure solenoid valve). Refer to "COMPONENT INSPECTION ".
- Step motor. Refer to "COMPONENT INSPECTION ".
OK or NG

OK: GO TO 6.

NG: Repair or replace damaged parts.
CHECK DTC
Perform "DTC CONFIRMATION PROCEDURE ".

OK or NG

OK: INSPECTION END

NG: Replace TCM or transaxle assembly. Refer to "REMOVAL AND INSTALLATION (MR20DE) ".