Chrysler New Yorker. Manual - part 577

TEST TC-31A

REPAIRING - ECT SENSOR VOLTAGE TOO HIGH

Perform TEST DTC Before Proceeding

FIG. 1

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TEST TC-31A

REPAIRING - ECT SENSOR VOLTAGE TOO HIGH

Perform TEST DTC Before Proceeding

*Perform Verification TEST VER-2A.

**Check connectors - Clean / repair as necessary.

START ENGINE. WITH IS 

THE ENGINE 

START TEST 

THE DRB, READ THE

COOLANT

YES

CONTINUE TEST 

TC-31A.

ENGINE COOLANT

TEMPERATURE SENSOR 

TC-31A ON THE

TEMPERATURE (ECT)

VOLTAGE ABOVE 4.5

NEXT PAGE.

SENSOR VOLTAGE. 

VOLTS? 

NO 

USE THE SCHEMATIC

WAS THERE ANY

REPAIR THE HARNESS

AS A GUIDE AND

MONITOR THE DRB

ENGINE COOLANT

YES

OR CONNECTOR THAT 

WIGGLE THE ECT

DISPLAY. 

TEMPERATURE SENSOR 

CAUSED THE VOLTAGE

SENSOR CONNECTOR &

VOLTAGE CHANGE?

CHANGE.* 

HARNESS. 

NO 

AT THIS TIME, THE

USING THE

CONDITION REQUIRED 

SCHEMATIC AS A

WERE ANY PROBLEMS 

YES

REPAIR AS 

TO SET THE CODE IS 

GUIDE, INSPECT THE

FOUND? 

NECESSARY.*

NOT PRESENT. WIRING 

AND

FIG. 1

CONNECTORS.

NO 

REFER TO GEN INFO 

3.3.2 FOR

INFORMATION ON 

TEST COMPLETE.* 

INACTIVE TROUBLE

CODES. 

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TEST TC-31A

CONTINUED - REPAIRING - ECT SENSOR VOLTAGE TOO HIGH

FIG. 1

FIG. 2

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TEST TC-31A

CONTINUED - REPAIRING - ECT SENSOR VOLTAGE TOO HIGH

*Perform Verification TEST VER-2A.

**Check connectors - Clean / repair as necessary.

TEST TC-31A 

KEY OFF. 

CONTINUED FROM DISCONNECT 

THE ECT

THE PREVIOUS SENSOR 

HARNESS

PAGE.

CONNECTOR.**SEE
GENERAL INFO 4.0

KEY ON. WITH A

AT THE ECT SENSOR 

REPAIR THE ECT

VOLTMETER, MEASURE

CONNECTOR. 

IS THE VOLTAGE

YES

SENSOR SIGNAL 

THE ECT SENSOR ABOVE 6.0 VOLTS? 

SHORTED TO 

SIGNAL...

VOLTAGE.*

FIG. 1

NO 

CONNECT A JUMPER 

WITH THE DRB, READ 

REPLACE THE ENGINE 

WIRE BETWEEN THE

THE ENGINE COOLANT

IS THE VOLTAGE

YES

COOLANT

ECT SENSOR 

SIGNAL TEMPERATURE SENSOR BELOW 1.0 VOLT?

TEMPERATURE

AND SENSOR GROUND 

VOLTAGE. 

SENSOR.* 

CKT. FIG. 1

NO 

MOVE THE JUMPER 

WITH THE DRB, READ 

WIRE FROM THE

THE ENGINE COOLANT

IS THE VOLTAGE

YES

REPAIR THE OPEN 

SENSOR GROUND TO 

TEMPERATURE SENSOR 

BELOW 1.0 VOLT?

SENSOR GROUND 

AN ENGINE GROUND.

VOLTAGE. 

CIRCUIT.*

FIG. 1

NO 

KEY OFF, DISCONNECT 

USING AN OHMMETER,

THE POWERTRAIN MEASURE THE ECT

IS 

THE RESISTANCE 

YES

REPLACE THE

CONTROL MODULE SENSOR 

SIGNAL BELOW 5.0 OHMS?

POWERTRAIN 

CONTROL

HARNESS CONNECTOR.** CIRCUIT FROM 

THE ECT

MODULE.* 

SEE GENERAL INFO 4.1

TO THE PCM. 

FIG. 

NO 

REPAIR THE OPEN 

ECT SENSOR SIGNAL 

CIRCUIT.*

2

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