Chrysler New Yorker. Manual — part 627

TEST TC-121A

REPAIRING - 2/1 FUEL SYSTEM LEAN

Perform TEST DTC Before Proceeding

LEFT BANK

FIG. 1

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TEST TC-121A

REPAIRING - 2/1 FUEL SYSTEM LEAN

Perform TEST DTC Before Proceeding

*Perform Verification TEST VER-2A.

**Check connectors - Clean / repair as necessary.

NOTE: VERY LOW FUEL

DID THE VEHICLE

ERASE TROUBLE

START TEST LEVEL COULD CAUSE

RUN OUT OF

FUEL

YES

CODES.

TC-121A.

THIS TROUBLE CODE TO

SHORTLY BEFORE

SET. MAKE SURE TANK

COMING IN?

TEST COMPLETE.*

IS AT LEAST 1/4 FULL

NO

REFER TO ARE THERE ANY

PERFORM THE

FIGURE 1

WITH THE DRB, READ

OTHER TROUBLE

YES

DTC TEST OR

FOR POSSIBLE ALL TROUBLE CODES.

CODES OR

T.S.B.’S THE T.S.B.’S

TROUBLE CODE

THAT APPLY?

THAT APPLY..

CAUSES.

NO

PERFORM THE

DID TEST NTC-5A

NO

REPAIR AS

FUEL DELIVERY TEST

NECESSARY.*

NTC-5A.

PASS?

YES

START THE ENGINE CHECK EXHAUST
AND ALLOW IT TO

SYSTEM FOR LEAKS

ARE THERE ANY

YES

REPAIR OR REPLACE

REACH NORMAL BETWEEN ENGINE

AND

EXHAUST LEAKS?

EXHAUST COMPONENTS

OPERATING

THE O2 SENSORS.

AS NECESSARY.*

TEMPERATURE.

NO

CYCLE KEY OFF,

READ THE

ARE ANY OF THE

THE CONDITION

THEN ON.

2/1 LEFT BANK UP

LONG TERM ADAPTIVE YES

REQUIRED TO SET THIS

LONG TERM ADAPTIVE

MEMORY BETWEEN

TROUBLE CODE IS NO

USING THE DRB, CHECK

MEMORY VALUES.

+20% AND +32%?

LONGER PRESENT.

FREEZE FRAME DATA.

TEST COMPLETE.*

NO

PERFORM TEST

TC-119B.

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TEST TC-121B

REPAIRING - 2/1 FUEL SYSTEM LEAN

Perform TEST TC-120A Before Proceeding

2/1 LEFT BANK UP

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TEST TC-121B

REPAIRING - 2/1 BANK FUEL SYSTEM LEAN

Perform TEST TC-120A Before Proceeding

Using the test schematic as a guide, make sure all the wiring and connectors are okay.

Perform each of the following tests in the order listed below. If a test passes, continue to the next
test until the problem is found:

Coolant Temperature Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TEST NTC-6A

MAP Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TEST NTC-8A

Engine Mechanical Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TEST NTC-13A

Intake Air Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TEST NTC-19A

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