Chrysler New Yorker. Manual - part 642

TEST TC-157A

CONTINUED - REPAIRING - INTERMITTENT LOSS OF CMP OR CKP

FIG. 1

FIG. 2

FIG. 3

FIG. 4

FIG. 5

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TEST TC-157A

CONTINUED - REPAIRING - INTERMITTENT LOSS OF CMP OR CKP

*Perform Verification TEST VER-2A.

**Check connectors - Clean / repair as necessary.

TEST TC-157A

AT THIS TIME THE

CONTINUED FROM 

CONDITIONS TO SET

THE PREVIOUS THE CODE 

ARE NOT

PAGE.

PRESENT. 

FIG. 1

WITH THE DRB, GO 

TO THE FREEZE 

RECORD THE FREEZE 

FRAME SCREEN.

FRAME DATA.

FIG. 3

CHANGE THE DRB TO 

WITH THE INFORMATION

WHILE MONITORING THE

LAB SCOPE. SET

FROM FREEZE FRAME, 

CKP AND THE CMP

BOTH CHANNEL ONE

OPERATE THE VEHICLE

SIGNAL CIRCUITS WITH 

AND CHANNEL TWO TO IN 

THOSE CONDITIONS.

THE DRB LAB SCOPE. 

LAB SCOPE. FIG. 

2

ARE THERE ANY

CONDITIONS TO SET

USE THE RECORDING

IRREGULARITIES IN 

NO 

THE FAULT ARE

FUNCTION OF THE

THE RECORDED LAB

STILL NOT PRESENT, 

LAB SCOPE. SCOPE PATTERNS?

ERASE CODE, TEST 

FIG. 4 AND 5

COMPLETE.* 

YES

THE IRREGULAR

REMOVE THE

PATTERN INDICATES

CONNECTOR FROM 

A PROBLEM WITH 

THAT SENSOR AND

THAT SIGNAL.

INSPECT CAREFULLY. 

INSPECT ALL
INTERMEDIATE ARE THERE ANY

YES

REPAIR 

AS 

CONNECTORS AND THE

PROBLEMS IN THESE

NECESSARY.*

WIRING HARNESS. 

AREAS? 

NO 

REPLACE THE

SENSOR.* 

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TEST TC-181A

REPAIRING - 2/1 O2S VOLTAGE SHORTED TO GROUND

Perform TEST DTC Before Proceeding

2/1 LEFT BANK UP

FIG. 1

2/1 LEFT BANK UP

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TEST TC-181A

REPAIRING - 2/1 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-181A. 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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