Batt/Fluid Temp (Fluid Temp Sens. Circuit & TCM Pwr. Source)

DTC BATT/FLUID TEMP SEN (A/T FLUID TEMP SENSOR CIRCUIT AND TCM POWER SOURCE)







Description
The A/T fluid temperature sensor detects the A/T fluid temperature and sends a signal to the TCM.

CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE:

TCM TERMINALS AND REFERENCE VALUE:

ON BOARD DIAGNOSIS LOGIC:

DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCEDURE
After the repair, perform the following procedure to confirm the malfunction is eliminated.


With CONSULT-II
1. Start engine.







2. Select "DATA MONITOR" mode for "A/T" with CONSULT-II.







3. Drive vehicle under the following conditions:
Selector lever in D position, vehicle speed higher than 20 km/h (12 MPH).


Without CONSULT-II
1. Start engine.
2. Drive vehicle under the following conditions:
Selector lever in D position, vehicle speed higher than 20 km/h (12 MPH).







3. Perform self-diagnosis.
Refer to "Displaying & Reading Trouble Codes / Without Scan Tool / TCM SELF-DIAGNOSTIC PROCEDURE (NO TOOLS)".
Without Scan Tool

AT - BA/FTS:

Diagnostic Procedure
1. CHECK TCM POWER SOURCE

1. Turn ignition switch to ON position.
(Do not start engine.)







2. Check voltage between TCM terminals (10, 19, 28) and ground.

Voltage : Battery voltage

3. Turn ignition switch to OFF position.
4. Check voltage between TCM terminal 28 and ground.

Voltage: Battery voltage

OK or NG?

OK >> GO TO 2.

NG >> Check the following items:
- Harness for short or open between ignition switch and TCM terminals (10, 19 and 28) (Main harness)
- Ignition switch and fuse

2. CHECK A/T FLUID TEMPERATURE SENSOR WITH TERMINAL CORD ASSEMBLY
1. Turn ignition switch to OFF position.
2. Disconnect terminal cord assembly connector in engine compartment.







3. Check resistance between terminal cord assembly connector E72 terminals 6 and 7 when A/T is cold [20°C (68°F)].

Is resistance approximately 2.5k Ohms?

Yes >> GO TO 3.

No >>
1. Remove oil pan.
2. Check the following items:
A/T fluid temperature sensor
Harness of terminal cord assembly for short or open

3. CHECK INPUT SIGNAL OF A/T FLUID TEMPERATURE SENSOR US With CONSULT
1. Start engine.
2. Select "TCM INPUT SIGNALS" in "DATA MONITOR" mode for "A/T" with CONSULT.







3. Readout the value of "FLUID TEMP SE".

Voltage:
Cold [20°C (68°F)] Approximately 1.5V -> 0.5V
Hot [80°C (176°F)]


Without CONSULT
1. Start engine.







2. Check voltage between TCM connector M78 terminal 47 and ground while warming up A/T.

Voltage:
Cold [20°C (68°F)] Approximately 1.5V -> 0.5V
Hot [80°C (176°F)]

OK or NG?

OK >> GO TO 4.

NG >> Check the following item:
Harness for short or open between TCM and terminal cord assembly (Main harness)


4. CHECK DTC
Perform "DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCEDURE".

OK or NG?

OK >> INSPECTION END.

NG >>
- Perform TCM input/output signal inspection.
- If NG, recheck TCM pin terminals for damage or loose connection with harness connector.











A/T FLUID TEMPERATURE SENSOR / Component Inspection
Check resistance between terminals 6 and 7 while changing temperature as shown at left.