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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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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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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