Chrysler New Yorker. Manual — part 674

TEST SC-1A

CHECKING SPEED CONTROL OPERATION

Perform TEST DTC Before Proceeding

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TEST SC-1A

CHECKING SPEED CONTROL OPERATION

Perform TEST DTC Before Proceeding

*Perform Verification TEST VER-4A.

**Check connectors - Clean / repair as necessary.

NOTE: USE THIS

START TEST

TEST ONLY WHEN

SC-1A. THERE ARE NO

SPEED

CONTROL CODES SET.

USING A DRB, IS THE S/C VACUUM

NO

PERFORM TEST

ACTUATE THE S/C

SOLENOID CLICKING?

TC-1B

VACUUM SOLENOID.

YES

STOP THE S/C

USING THE DRB

IS THE S/C VENT

NO

PERFORM TEST

VACUUM SOLENOID

ACTUATE THE S/C

SOLENOID CLICKING?

TC-1B

ACTUATION. VENT

SOLENOID.

YES

KEY ON, WITH THE

WHILE OBSERVING

DOES THE DRB

DRB, MONITOR THE

DISPLAY, PRESS THE

DISPLAY SPEED

NO

PERFORM TEST

SPEED CONTROL

SPEED CONTROL "ON" CONTROL SWITCH

SC-2A.

SWITCH INPUTS.

SWITCH.

"ON"?

YES

WHILE OBSERVING

DOES THE DRB

THE DISPLAY, PRESS

DISPLAY SET SWITCH

NO

REPLACE THE SET

THE SET SWITCH "PRESSED" OR

SWITCH.*

SEVERAL TIMES. "RELEASED"?

YES

WHILE OBSERVING

DOES THE DRB

THE DISPLAY, PRESS

DISPLAY RESUME

NO

PERFORM TEST

THE RESUME SWITCH

SWITCH "PRESSED"

SC-3A.

SEVERAL TIMES. OR

"RELEASED"?

YES

WHILE OBSERVING

DOES THE DRB

THE DISPLAY, PRESS

DISPLAY CANCEL

NO

REPLACE THE CANCEL

THE CANCEL SWITCH

SWITCH "PRESSED"

SWITCH.*

SEVERAL TIMES. OR

"RELEASED"?

YES

PERFORM TEST

SC-4A.

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TEST SC-1B

CHECKING SPEED CONTROL OPERATION

Perform TEST SC-1A Before Proceeding

FIG. 1

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TEST SC-1B

CHECKING SPEED CONTROL OPERATION

Perform TEST SC-1A Before Proceeding

*Perform Verification TEST VER-4A.

**Check connectors - Clean / repair as necessary.

KEY OFF, DISCONNECT

START TEST THE SPEED CONTROL

IS

ANY TERMINAL

YES

REPAIR AS

SC-1B. SERVO CONNECTOR.**

DAMAGED,

PUSHED

NECESSARY.*

OUT OR MISWIRED?

SEE GENERAL INFO 4.2

NO

USING AN OHMMETER,
MEASURE RESISTANCE

IS

THE RESISTANCE NO REPAIR

THE OPEN

OF THE GROUND

BELOW 5.0 OHMS?

GROUND CIRCUIT.*

CIRCUIT TO GROUND.

FIG. 1

YES

IGNITION ON. WITH

USING A VOLTMETER

THE DRB, ACTUATE

MEASURE THE S/C

IS THE VOLTAGE

NO

PERFORM TEST

THE S/C VENT

BRAKE SWITCH OUTPUT

ABOVE 10.0 VOLTS?

SC-1D.

SOLENOID.

CKT AT S/C

CONNECTOR. FIG.

1

YES

RECONNECT THE SPEED

TURN ENGINE OFF

CONTROL SERVO

(IGNITION ON). WITH

DOES THE THROTTLE

YES

PERFORM TEST

CONNECTOR. START

THE DRB, ACTUATE THE

OPEN AND CLOSE?

SC-5A.

ENGINE, ALLOW TO SPEED CONTROL SERVO

IDLE 1 MINUTE.

SOLENOIDS.

NO

KEY OFF, DISCONNECT

ATTACH A VACUUM

THE VACUUM SUPPLY TO

GAUGE TO THE

DOES THE VACUUM

NO

REPAIR THE VACUUM

THE SPEED CONTROL

DISCONNECTED HOSE.

GAUGE READ

SUPPLY FOR A LEAK

SERVO.

START ENGINE.

MANIFOLD VACUUM?

OR RESTRICTION.*

SEE GENERAL INFO 4.2

YES

TURN ENGINE OFF,

OBSERVE THE VACUUM DOES

THE VACUUM

NO

REPLACE THE VACUUM

GAUGE FOR 10

HOLD FOR AT LEAST

RESERVOIR.*

SECONDS. 10.0

SECONDS?

YES

PERFORM TEST

SC-1C.

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