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