Chrysler New Yorker. Manual - part 614

TEST TC-90A

CONTINUED - REPAIRING - A/C PRESSURE SENSOR VOLTS TOO HIGH

FIG. 1

FIG. 2

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TEST TC-90A

CONTINUED - REPAIRING - A/C PRESSURE SENSOR VOLTS TOO HIGH

*Perform Verification TEST VER-2A.

**Check connectors - Clean / repair as necessary.

TEST TC-90A 

KEY OFF. DISCONNECT 

CONTINUED FROM THE A/C PRESSURE 

THE PREVIOUS SENSOR 

HARNESS

PAGE.

CONNECTOR.** 

SEE GENERAL INFO 4.4

KEY ON. USING A

AT THE A/C

REPAIR THE A/C

VOLTMETER, MEASURE

PRESSURE SENSOR 

IS THE VOLTAGE

YES

PRESSURE SENSOR 

VOLTAGE AT THE A/C

CONNECTOR. 

ABOVE 5.5 VOLTS? 

CIRCUIT SHORTED TO 

PRESSURE SENSOR 

VOLTAGE.*

SIGNAL CIRCUIT... 

FIG. 1

NO 

CONNECT A JUMPER 

WIRE BETWEEN THE A/C

WITH THE DRB, READ 

IS THE VOLTAGE

YES

REPLACE THE A/C

PRESSURE SENSOR 

THE A/C PRESSURE 

BELOW 1.0 VOLT?

PRESSURE SENSOR.* 

SIGNAL & SENSOR GND

SENSOR VOLTAGE. 

CKTS.

FIG. 1

NO 

MOVE THE END OF THE

WHILE KEEPING THE

JUMPER WIRE 

OTHER END OF THE

CONNECTED TO THE

JUMPER WIRE 

SENSOR GROUND CKT TO 

CONNECTED TO THE A/C

A KNOWN GOOD GND... 

PRESSURE SIGNAL CKT. 

WITH THE DRB, READ 

IS THE VOLTAGE

YES

REPAIR THE OPEN 

THE A/C PRESSURE BELOW 1.0 VOLT?

SENSOR 

GROUND 

SENSOR VOLTAGE. 

CIRCUIT.*

YES

KEY OFF. DISCONNECT 

WITH AN OHMMETER,

THE POWERTRAIN 

MEASURE A/C PRESSURE 

IS THE RESISTANCE 

NO 

REPAIR THE OPEN 

CONTROL MODULE 

SENSOR SIGNAL CKT

BELOW 5.0 OHMS?

SENSOR SIGNAL 

HARNESS CONNECTOR.** BETWEEN SENSOR 

AND

CIRCUIT.*

SEE GENERAL INFO 4.1

PCM. 

FIG. 2

YES

WITH AN OHMMETER,

REPAIR THE SHORT

MEASURE BETWEEN THE

IS THE RESISTANCE 

YES

BETWEEN THE SENSOR 

A/C PRESSURE SENSOR 

BELOW 5.0 OHMS?

SIGNAL CIRCUIT AND

SIGNAL AND 5-VOLT 

THE 5-VOLT SUPPLY 

SUPPLY. FIG. 1

CIRCUIT.*

NO 

REPLACE THE

POWERTRAIN CONTROL

MODULE.* 

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TEST TC-91A

REPAIRING - A/C PRESSURE SENSOR VOLTS TOO LOW

Perform TEST DTC Before Proceeding

FIG. 1

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TEST TC-91A

REPAIRING - A/C PRESSURE SENSOR VOLTS TOO LOW

Perform TEST DTC Before Proceeding

*Perform Verification TEST VER-2A.

**Check connectors - Clean / repair as necessary.

START ENGINE. WITH 

START TEST 

THE DRB, READ THE

IS THE VOLTAGE

NO 

CONTINUE TEST 

TC-91A.

A/C PRESSURE 

ABOVE 0.2 VOLT?

TC-91A ON THE

SENSOR VOLTAGE. 

NEXT PAGE.

YES

WHILE MONITORING THE

REPAIR THE HARNESS

DRB DISPLAY, WIGGLE 

DID THE VOLTAGE

YES

OR CONNECTOR THAT 

THE A/C PRESSURE 

CHANGE DURING THE

CAUSED THE VOLTAGE

SENSOR CONNECTOR &

WIGGLE TEST?

TO 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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