Diagnostic Procedure

CHECK INPUT SIGNALS

With CONSULT-III

Start engine.
Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
Start vehicle.

Check if there is a great difference between "ENG SPEED SIG" and "PRI SPEED SEN". (Lock up ON.)

ITEM NAME CONDITION CHART

Item name	Condition	Display value
ENG SPEED SIG	Engine running	Closely matches the tachometer reading.
PRI SPEED SEN	During driving (lock up ON)	Approximately matches the engine speed.

OK or NG

OK: GO TO 5.

NG: GO TO 2.

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

OK or NG

OK: GO TO 3.

NG: Repair or replace damaged parts. Refer to "JUDGMENT OF LINE PRESSURE TEST ".
DETECT MALFUNCTIONING ITEM
Check the following:
- Torque converter clutch solenoid valve. Refer to "COMPONENT INSPECTION ".
- Lock up select solenoid valve. Refer to "COMPONENT INSPECTION ".
OK or NG

OK: GO TO 4.

NG: Repair or replace damaged parts.
CHECK OUTPUT SPEED SENSOR (SECONDARY SPEED SENSOR) SYSTEM AND INPUT SPEED SENSOR (PRIMARY SPEED SENSOR) SYSTEM
Check output speed sensor (secondary speed sensor) system and input speed sensor (primary speed sensor) system. Refer to "DTC P0720 VEHICLE SPEED SENSOR CVT (SECONDARY SPEED SENSOR) ", "DTC P0715 INPUT SPEED SENSOR CIRCUIT (PRI SPEED SENSOR) ".

OK or NG

OK: GO TO 5.

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

OK or NG

OK: INSPECTION END

NG: GO TO 6.
CHECK TCM
1. Check TCM input/output signals. Refer to "TCM INPUT/OUTPUT SIGNAL REFERENCE VALUES ".
2. If NG, re-check TCM pin terminals for damage or loose connection with harness connector.
OK or NG

OK: INSPECTION END

NG:
1. Repair or replace damaged parts.
2. Replace the transaxle assembly. Refer to "REMOVAL AND INSTALLATION (MR20DE) ".