Diagnostic Procedure

With CONSULT-III 

1. Start engine.
2. Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
3. Read out the value of "ATF TEMP SEN".
   ITEM NAME CONDITION CHART
   
   

   Item name	Condition	Display value (Approx.)
   ATF TEMP SEN	When CVT fluid temperature is 20°C (68°F)	2.0 V
   	When CVT fluid temperature is 80°C (176°F)	1.0 V

Without CONSULT-III 

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

   Name	Connector	Terminal	Temperature °C (°F)	Voltage (Approx.)
   CVT fluid temperature sensor	F23	13 - 25	20 (68)	2.0 V
   			80 (176)	1.0 V

3. Turn ignition switch OFF.
4. Disconnect TCM connector.
5. Check if there is continuity between connector terminal and ground.

OK or NG 

OK: GO TO  5.

NG: GO TO 2.

1. Turn ignition switch OFF.
2. Disconnect the TCM connector.
3. Check resistance between TCM connector terminals.
   RESISTANCE SPECIFICATION CHART
   
   

   Name	Connector	Terminal	Temperature °C (°F)	Resistance (Approx.)
   CVT fluid temperature sensor	F23	13 - 25	20 (68)	6.5 kΩ
   			80 (176)	0.9 kΩ

OK or NG 

OK: GO TO  5.

NG: GO TO 3.

1. Turn ignition switch OFF.
2. Disconnect CVT unit harness connector.
3. Check resistance between CVT unit harness connector terminals.
   RESISTANCE SPECIFICATION CHART
   
   

   Name	Connector	Terminal	Temperature °C (°F)	Resistance (Approx.)
   CVT fluid temperature sensor	F46	17 - 19	20 (68)	6.5 kΩ
   			80 (176)	0.9 kΩ

4. Reinstall any part removed.
   Fig 1: Checking Resistance Between CVT Unit Harness Connector Terminals

   

OK or NG 

OK: GO TO 4.

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

1. Turn ignition switch OFF.
2. Disconnect the TCM connector (A) and CVT unit harness connector (B).
3. Check continuity between TCM connector (A) terminals and CVT unit harness connector (B) terminals.
   CONTINUITY REFERENCE CHART
   
   

   Item	Connector	Terminal	Continuity
   TCM	F23	13	Yes
   CVT unit harness connector	F46	17
   TCM	F23	25	Yes
   CVT unit harness connector	F46	19

4. If OK, check harness for short to ground and short to power.
5. Reinstall any part removed.
   Fig 2: Checking Continuity Between TCM Connector Terminals And CVT Unit Harness Connector Terminals

   

OK or NG 

OK: GO TO 5.

NG: Repair or replace damaged parts.

Perform "DTC CONFIRMATION PROCEDURE ".

OK or NG 

OK: INSPECTION END 

NG: GO TO 6.

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: Repair or replace damaged parts.