Diagnostic Procedure

Perform the self-diagnosis. Refer to "SELF-DIAGNOSTIC RESULT MODE ".

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.

With CONSULT-III 

1. Start engine.
2. Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
3. Start vehicle and read out the value of "SEC HYDR SEN" and "PRI HYDR SEN".
   ITEM NAME CONDITION CHART
   
   

   Item name	Condition	Display value (Approx.)
   PRI HYDR SEN	"N" position idle	0.7 - 3.5 V
   SEC HYDR SEN		1.0 V

Without CONSULT-III 

1. Start engine.
2. Check voltage between TCM connector terminals and ground.
   VOLTAGE SPECIFICATION CHART
   
   

   Name	Connector	Terminal	Condition	Voltage (Approx.)
   Transmission fluid pressure sensor B (Primary pressure sensor)	F23	14 - Ground	"N" position idle	0.7 - 3.5 V
   Transmission fluid pressure sensor A (Secondary pressure sensor)		15 - Ground		1.0 V

OK or NG 

OK: GO TO  6.

NG: GO TO 3.

Perform line pressure test. Refer to "LINE PRESSURE TEST ".

OK or NG 

OK: GO TO 4.

NG: Repair or replace damaged parts. Refer to "JUDGMENT OF LINE PRESSURE TEST ".

Check transmission fluid pressure sensor A (secondary pressure sensor) system and transmission fluid pressure sensor B (primary pressure sensor) system. Refer to "DTC P0840 TRANSMISSION FLUID PRESSURE SENSOR A CIRCUIT (SEC PRESSURE SENSOR) ", "DTC P0845 TRANSMISSION FLUID PRESSURE SENSOR B CIRCUIT (PRI PRESSURE SENSOR) ".

OK or NG 

OK: GO TO 5.

NG: Repair or replace damaged parts.

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 NG6 

OK: GO TO 6.

NG: Repair or replace damaged parts.

Perform "DTC CONFIRMATION PROCEDURE ".

OK or NG 

OK: INSPECTION END 

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