Page 169 of 2898
Wiring Diagram Ð AT Ð BA/FTSNJAT0214
HAT083
BATT/FLUID TEMP SEN (A/T FLUID TEMP SENSOR CIRCUIT AND TCM
POWER SOURCE)
EXCEPT FOR EURO-OBD
Wiring Diagram Ð AT Ð BA/FTS
AT-167
Page 170 of 2898
Diagnostic ProcedureNJAT0077
1 CHECK TCM POWER SOURCE
1. Turn ignition switch to ªONº position.
(Do not start engine.)
2. Check voltage between TCM terminals 10, 19, 28 and ground.
Voltage:
Battery voltage
3. Turn ignition switch to ªOFFº position.
4. Check voltage between TCM terminal 28 and ground.
Voltage:
Battery voltage
SAT461J
OK or NG
OK©GO TO 2.
NG©Check the following items:
+Harness for short or open between ignition switch and TCM (Main harness)
+Ignition switch and fuse
Refer to EL-10, ªPOWER SUPPLY ROUTINGº.
BATT/FLUID TEMP SEN (A/T FLUID TEMP SENSOR CIRCUIT AND TCM
POWER SOURCE)
EXCEPT FOR EURO-OBD
Diagnostic Procedure
AT-168
Page 171 of 2898

2 CHECK A/T FLUID TEMPERATURE SENSOR WITH TERMINAL CORD ASSEMBLY
1. Turn ignition switch to ªOFFº position.
2. Disconnect terminal cord assembly connector in engine compartment.
3. Check resistance between terminals 6 and 7 when A/T is cold.
Resistance:
Cold [20ÉC (68ÉF)]
Approximately 2.5 kW
SAT912JA
4. Reinstall any part removed.
OK or NG
OK (With CONSULT-II)©GO TO 3.
OK (Without CONSULT-
II)©GO TO 4.
NG©1. Remove oil pan.
2. Check the following items:
+A/T fluid temperature sensor
Refer to ªComponent Inspectionº, AT-171.
+Harness of terminal cord assembly for short or open
3 CHECK INPUT SIGNAL OF A/T FLUID TEMPERATURE SENSOR (WITH CONSULT-II)
With CONSULT-II
1. Start engine.
2. Select ªECU INPUT SIGNALSº in ªDATA MONITORº mode for ªA/Tº with CONSULT-II.
3. Read out the value of ªFLUID TEMP SEº.
Voltage:
Cold [20ÉC (68ÉF)]®Hot [80ÉC (176ÉF)]:
Approximately 1.5V®0.5V
SAT614J
OK or NG
OK©GO TO 5.
NG©Check the following item:
+Harness for short or open between TCM, ECM and terminal cord assembly (Main har-
ness)
+Ground circuit for ECM
Refer to EC-178, ªTROUBLE DIAGNOSIS FOR POWER SUPPLYº.
BATT/FLUID TEMP SEN (A/T FLUID TEMP SENSOR CIRCUIT AND TCM
POWER SOURCE)
EXCEPT FOR EURO-OBD
Diagnostic Procedure (Cont'd)
AT-169
Page 172 of 2898

4 CHECK INPUT SIGNAL OF A/T FLUID TEMPERATURE SENSOR (WITHOUT CONSULT-II)
Without CONSULT-II
1. Start engine.
2. Check voltage between TCM terminal 47 and ground while warming up A/T.
Voltage:
Cold [20ÉC (68ÉF)]®Hot [80ÉC (176ÉF)]:
Approximately 1.5V®0.5V
SAT463J
3. Turn ignition switch to ªOFFº position.
4. Disconnect TCM harness connector.
5. Check resistance between terminal 42 and ground.
Continuity should exist.
SAT464J
OK or NG
OK©GO TO 5.
NG©Check the following item:
+Harness for short or open between TCM, ECM and terminal cord assembly (Main har-
ness)
+Ground circuit for ECM
Refer to EC-178, ªTROUBLE DIAGNOSIS FOR POWER SUPPLYº.
5 CHECK DTC
Perform Self-diagnosis Code confirmation procedure, AT-166.
OK or NG
OK©INSPECTION END
NG©1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness con-
nector.
BATT/FLUID TEMP SEN (A/T FLUID TEMP SENSOR CIRCUIT AND TCM
POWER SOURCE)
EXCEPT FOR EURO-OBD
Diagnostic Procedure (Cont'd)
AT-170
Page 173 of 2898
SAT298F
Component InspectionNJAT0078A/T FLUID TEMPERATURE SENSORNJAT0078S01+For removal, refer to AT-351.
+Check resistance between two terminals while changing tem-
perature as shown at left.
Temperature ÉC (ÉF) Resistance
20 (68) Approximately 2.5 kW
80 (176) Approximately 0.3 kW
BATT/FLUID TEMP SEN (A/T FLUID TEMP SENSOR CIRCUIT AND TCM
POWER SOURCE)
EXCEPT FOR EURO-OBD
Component Inspection
AT-171
Page 174 of 2898

DescriptionNJAT0041The engine speed signal is sent from the ECM to the TCM.
TCM TERMINALS AND REFERENCE VALUENJAT0041S01Remarks: Specification data are reference values.
Terminal
No.Wire color Item ConditionJudgement stan-
dard
39 L/OREngine speed
signal
Refer to EC-32, ªECM INSPECTION
TABLEº.Ð
ON BOARD DIAGNOSIS LOGICNJAT0041S02
Diagnostic trouble code Malfunction is detected when ... Check item (Possible cause)
: ENGINE SPEED SIG
TCM does not receive the proper voltage
signal from ECM.+Harness or connectors
(The sensor circuit is open or shorted.)
: 9th judgement flicker
SAT580J
SAT823H
SELF-DIAGNOSIS CODE CONFIRMATION PROCEDURENJAT0041S04After the repair, perform the following procedure to confirm the
malfunction is eliminated.
With CONSULT-IINJAT0041S04011) Start engine.
2) Select ªSELF-DIAG RESULTSº mode for A/T with CONSULT-
II.
3) Drive vehicle under the following conditions:
Selector lever in ªDº position, vehicle speed higher than 10
km/h (6 MPH), throttle opening greater than 1/8 of the full
throttle position and driving for more than 10 seconds.
Without CONSULT-IINJAT0041S04021) Start engine.
2) Drive vehicle under the following conditions:
Selector lever in ªDº position, vehicle speed higher than 10
km/h (6 MPH), throttle opening greater than 1/8 of the full
throttle position and driving for more than 10 seconds.
3) Perform self-diagnosis.
Refer to ªSELF-DIAGNOSTIC PROCEDURE (Without
CONSULT-II)º, AT-44.
ENGINE SPEED SIGNALEXCEPT FOR EURO-OBD
Description
AT-172
Page 175 of 2898
Wiring Diagram Ð AT Ð ENGSSNJAT0202
HAT095
ENGINE SPEED SIGNALEXCEPT FOR EURO-OBD
Wiring Diagram Ð AT Ð ENGSS
AT-173
Page 176 of 2898
Diagnostic ProcedureNJAT0042
1 CHECK DTC WITH ECM
Perform diagnostic test mode II (self-diagnostic results) for engine control. Check ignition signal circuit condition.
OK or NG
OK (With CONSULT-II)©GO TO 2.
OK (Without CONSULT-
II)©GO TO 3.
NG©Check ignition signal circuit for engine control. Refer to EC-547, ªIGNITION SIGNALº.
2 CHECK INPUT SIGNAL (With CONSULT-II)
With CONSULT-II
1. Start engine.
2. Select ªECU INPUT SIGNALSº in ªDATA MONITORº mode for ªA/Tº with CONSULT-II.
SAT580J
3. Read out the value of ªENGINE SPEEDº.
Check engine speed changes according to throttle position.
SAT645J
OK or NG
OK©GO TO 4.
NG©Check the following items:
+Harness for short or open between TCM and ECM
+Resistor and ignition coil
Refer to EC-547, ªIGNITION SIGNALº.
ENGINE SPEED SIGNALEXCEPT FOR EURO-OBD
Diagnostic Procedure
AT-174