Chrysler New Yorker. Manual — part 641

TEST TC-156A

REPAIRING - 1/2 O2S VOLTAGE SHORTED TO GROUND

Perform TEST DTC Before Proceeding

1/2 RIGHT BANK DOWN

FIG. 1

1/2 RIGHT BANK DOWN

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TEST TC-156A

REPAIRING - 1/2 O2S VOLTAGE SHORTED TO GROUND

Perform TEST DTC Before Proceeding

*Perform Verification TEST VER-2A.

**Check connectors - Clean / repair as necessary.

NOTE:

START TEST

REFER TO FIGURE 1

TC-156A. FOR POSSIBLE

TROUBLE CODE

CAUSES.

WITH THE DRB IN

IS THE

THE CONDITION

SENSORS, MONITOR

SUSPECT O2

SENSOR NO REQUIRED

TO

SET

START ENGINE.

THE

VOLTAGE BELOW

THIS TROUBLE CODE

SUSPECT O2 SENSOR

0.16 VOLTS?

IS NOT PRESENT AT

VOLTAGE. THIS

TIME.*

YES

KEY OFF.

WITH THE DRB IN

IS THE

DISCONNECT THE

SENSORS, MONITOR

SUSPECT O2 SENSOR

NO

REPLACE THE

SUSPECT O2 SENSOR

THE

VOLTAGE BELOW

SUSPECT O2

HARNESS CONNECTOR.**

SUSPECT O2 SENSOR

0.16 VOLTS?

SENSOR.*

SEE GENERAL INFO 4.4

VOLTAGE.

YES

KEY OFF. DISCONNECT

THE POWERTRAIN
CONTROL MODULE

HARNESS CONNECTOR.**
SEE GENERAL INFO 4.1

USING AN OHMMETER,

SIGNAL CIRCUIT AND

REPAIR THE

MEASURE THE

THE SENSOR

IS THE RESISTANCE

YES

SUSPECT O2 SENSOR

RESISTANCE BETWEEN

SIGNAL/O2S RETURN

BELOW 5.0 OHMS?

SIGNAL CIRCUIT FOR A

THE SUSPECT O2 CIRCUIT.

SHORT TO

SIGNAL/O2S

SENSOR...

RETURN.*

NO

USING AN OHMMETER,

REPAIR THE

MEASURE THE

SENSOR SIGNAL

IS THE RESISTANCE

YES

SUSPECT O2 SENSOR

RESISTANCE BETWEEN

CIRCUIT AND ENGINE

BELOW 5.0 OHMS?

SIGNAL CIRCUIT FOR

THE SUSPECT O2...

GROUND.

A SHORT TO ENGINE

GROUND.*

NO

REPLACE THE

POWERTRAIN CONTROL

MODULE.*

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401

TEST TC-157A

REPAIRING - INTERMITTENT LOSS OF CMP OR CKP

Perform TEST DTC Before Proceeding

FIG. 1

FIG. 2

FIG. 3

FIG. 4

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402

TEST TC-157A

REPAIRING - INTERMITTENT LOSS OF CMP OR CKP

Perform TEST DTC Before Proceeding

*Perform Verification TEST VER-2A.

**Check connectors - Clean / repair as necessary.

START TEST

WITH THE DRB, READ

IS THE GLOBAL GOOD NO

PERFORM TEST

TC-157A.

THE DTC’S.

TRIP DISPLAYED AND

TC-157A ON THE

EQUAL TO 0?

NEXT PAGE.

YES

USING THE DRB, GO

IS IT POSSIBLE TO

THIS MEANS THAT

TO THE FREEZE

OPERATE THE

NO

PERFORM TEST

THE FAULT STILL

FRAME SCREEN.

VEHICLE IN THESE

TC-157A ON THE

EXISTS.

CONDITIONS?

NEXT PAGE.

FIG. 2

YES

COPY THE FREEZE

WITH THE DRB IN THE

FRAME DATA FOR USE

LAB SCOPE, PROBE

DURING THIS TEST

BOTH THE CAM AND THE

PROCEDURE. CRANK SENSOR.

FIG. 1

OPERATE THE

IF POSSIBLE WIGGLE

IS THERE ANY

VEHICLE IN THE

THE WIRING HARNESS

IRREGULARITIES IN

NO

PERFORM TEST

FREEZE FRAME

TO TRY AND

THE LAB SCOPE

157A ON THE

PARAMETERS DUPLICATE THE

PATTERNS?

NEXT

PAGE.

CONDITION. FIG.

3 AND 4

YES

CAREFULLY CHECK

CAREFULLY CHECK

ARE THERE ANY

THE WIRING HARNESS

THE CONNECTORS ON

PROBLEMS WITH THE

YES

REPAIR AS

FOR ANY SIGNS OF THE SENSORS AND

HARNESS THAT

CAN

NECESSARY.*

EXTERNAL DAMAGE.

THE PCM.

BE SEEN?

NO

REPLACE THE SENSOR
WITH IRREGULAR LAB

SCOPE PATTERN.*

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