Chrysler New Yorker. Manual — part 577

TEST TC-31A

REPAIRING - ECT SENSOR VOLTAGE TOO HIGH

Perform TEST DTC Before Proceeding

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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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