Chrysler New Yorker. Manual — part 629

TEST TC-125A

REPAIRING - 2/2 O2S HEATER FAILURE

Perform TEST DTC Before Proceeding

2/2 LEFT BANK DOWN

T

R

O

U
B

L

E

C

O

D

E

T

E
S

T

S

352

TEST TC-125A

REPAIRING - 2/2 O2S HEATER FAILURE

Perform TEST DTC Before Proceeding

*Perform Verification TEST VER-2A.

**Check connectors - Clean / repair as necessary.

ARE THERE ANY

REFER TO "DTC

START TEST

WITH THE DRB, READ

OTHER "2/2 O2

YES

TEST" TO PERFORM

TC-125A. ALL TROUBLE CODES.

SENSOR" RELATED

THE APPROPRIATE

TROUBLE CODES? OXYGEN

SENSOR

TEST.

NO

TURN IGNITION OFF

WAIT 8 MINUTES.

(ENGINE OFF)

IGNITION ON.

WAIT FOR THE VOLTAGE

WITH THE DRB IN

READING TO STABILIZE

SENSORS, MONITOR

THE 2/2 O2 SENSOR

VOLTAGE. BETWEEN 0.4 AND 0.6V

WITH THE DRB IN

MONITOR THE

IS THE

ACTUATOR TESTS,

2/2 O2 SENSOR

2/2 O2 SENSOR

YES

CONTINUE TEST

PERFORM THE O2 VOLTAGE FOR TWO

VOLTAGE STILL

TC-125A ON

THE

SENSOR HEATER

MINUTES.

BETWEEN 0.4 AND

NEXT PAGE.

TEST.

0.6V?

NO

AT THIS TIME, THE
CONDITION REQUIRED

STOP ALL ACTUATOR

TO SET THE TROUBLE

TESTS.

CODE IS NOT

TEST COMPLETE.*

PRESENT.

T

R

O

U
B

L

E

C

O

D

E

T

E
S

T

S

353

TEST TC-125A

CONTINUED - REPAIRING - 2/2 O2S HEATER FAILURE

2/2 LEFT BANK DOWN

FIG. 1

2/2 LEFT BANK DOWN

FIG. 2

T

R

O

U
B

L

E

C

O

D

E

T

E
S

T

S

354

TEST TC-125A

CONTINUED - REPAIRING - 2/2 O2S HEATER FAILURE

*Perform Verification TEST VER-2A.

**Check connectors - Clean / repair as necessary.

TEST TC-125A

DISCONNECT THE

IS ANY TERMINAL

CONTINUED FROM

2/2 O2 SENSOR

CORRODED, DAMAGED,

YES

REPAIR OR REPLACE

THE PREVIOUS

HARNESS CONNECTOR.**

PUSHED OUT OR

AS NECESSARY.*

PAGE MISWIRED?

SEE GENERAL INFO 4.4

NO

NOTE:

USING A VOLTMETER, CHECK FUSES OR

THE DRB IS STILL

MEASURE THE ASD

IS THE VOLTAGE

NO

REPAIR THE OPEN

ACTUATING THE O2 RELAY OUTPUT

ABOVE 10.5

VOLTS?

ASD RELAY OUTPUT

SENSOR HEATER

CIRCUIT.

CIRCUIT.*

TEST.

FIG. 1

YES

STOP ALLOW 2/2 O2

SENSOR

ALL ACTUATOR

TO COOL DOWN TO

ROOM TEMPERATURE.

TESTS.

USING AN OHMMETER,

MEASURE THE O2 IS

THE RESISTANCE

NO

REPLACE THE 2/2 O2

SENSOR HEATER

BETWEEN 4.0 AND

SENSOR.*

ELEMENT TERMINALS

7.0 OHMS?

1 AND 2. FIG. 2

YES

USING AN OHMMETER,

CIRCUIT TO GROUND.

IS THE RESISTANCE

NO

REPAIR THE OPEN

MEASURE FROM THE

BELOW 5.0 OHMS?

2/2 O2 SENSOR

HEATER GROUND...

FIG. 1

GROUND CIRCUIT.*

YES

REPLACE THE 2/2 O2

SENSOR.*

T

R

O

U
B

L

E

C

O

D

E

T

E
S

T

S

355