Chrysler New Yorker. Manual — part 675

TEST SC-1C

CHECKING SPEED CONTROL OPERATION

Perform TEST SC-1A Before Proceeding

FIG. 1

FIG. 2

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536

TEST SC-1C

CHECKING SPEED CONTROL OPERATION

Perform TEST SC-1A Before Proceeding

*Perform Verification TEST VER-4A.

**Check connectors - Clean / repair as necessary.

START TEST

INSPECT THE

IS THE CABLE

YES

REPAIR AS

SC-1C

THROTTLE CABLE.

DISCONNECTED OR

NECESSARY.*

DAMAGED?

NO

KEY OFF. DISCONNECT

DISCONNECT THE

THE SPEED CONTROL

POWERTRAIN CONTROL

SERVO 4 WAY HARNESS

MODULE HARNESS

CONNECTOR.** CONNECTOR.**

SEE GENERAL INFO 4.2

SEE GENERAL INFO 4.1

USING AN OHMMETER,

FROM PCM CONNECTOR

REPAIR THE OPEN

MEASURE THE

TO S/C SERVO

IS THE RESISTANCE

NO

SPEED CONTROL

RESISTANCE OF THE

CONNECTOR.

BELOW 5.0 OHMS?

VACUUM SOLENOID

S/C VACUUM SOLENOID

CONTROL CIRCUIT.*

CONTROL CIRCUIT... FIG.

1

YES

USING AN OHMMETER,

REPAIR THE SHORT

MEASURE S/C VACUUM

IS THE RESISTANCE

YES

TO GROUND IN THE

SOLENOID CONTROL

BELOW 5.0 OHMS?

SPEED CONTROL

CIRCUIT TO GROUND.

VACUUM SOLENOID

FIG. 2

CONTROL CIRCUIT.*

NO

USING AN OHMMETER,

FROM PCM CONNECTOR

REPAIR THE OPEN

MEASURE THE

TO S/C SERVO

IS THE RESISTANCE

NO

SPEED CONTROL VENT

RESISTANCE OF THE

CONNECTOR.

BELOW 5.0 OHMS?

SOLENOID CONTROL

S/C VENT SOLENOID

CIRCUIT.*

CONTROL CIRCUIT... FIG.

1

YES

USING AN OHMMETER,

REPAIR THE SHORT

MEASURE THE S/C VENT

IS THE RESISTANCE

NO

TO GROUND IN THE

SOLENOID CONTROL

BELOW 5.0 OHMS?

SPEED CONTROL VENT

CIRCUIT TO GROUND.

SOLENOID CONTROL

CIRCUIT.*

YES

REPLACE THE SPEED

CONTROL SERVO.*

FIG. 2

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537

TEST SC-1D

CHECKING SPEED CONTROL OPERATION

Perform TEST SC-1A Before Proceeding

FIG. 1

FIG. 2

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538

TEST SC-1D

CHECKING SPEED CONTROL OPERATION

Perform TEST SC-1A Before Proceeding

*Perform Verification TEST VER-4A.

**Check connectors - Clean / repair as necessary.

DISCONNECT THE BRAKE

START TEST

SWITCH HARNESS

IS ANY TERMINAL

YES

REPAIR AS

SC-1D. CONNECTOR.**

DAMAGED,

PUSHED

NECESSARY.*

OUT OR MISWIRED?

SEE GENERAL INFO 4.2

NO

MEASURE THE S/C

REPAIR THE SHORT

USE AN OHMMETER IN

BRAKE SWITCH OUTPUT

IS THE RESISTANCE

YES

TO GROUND IN THE

THE FOLLOWING

CIRCUIT TO GROUND AT

BELOW 5.0 OHMS?

S/C BRAKE SWITCH

STEPS. SERVO CONNECTOR.

OUTPUT

CIRCUIT.*

FIG. 1

NO

MEASURE THE

RESISTANCE OF

IS THE RESISTANCE

NO REPAIR THE OPEN IN

BRAKE SWITCH BELOW 5.0 OHMS?

THE BRAKE SWITCH

OUTPUT CIRCUIT.

OUTPUT CIRCUIT.*

FIG. 1 AND 2

YES

USING A VOLTMETER,

NOTE: S/C VENT

MEASURE THE S/C

IS THE VOLTAGE

NO

CONTINUE TEST

SOLENOID IS STILL

POWER SUPPLY CKT AT

ABOVE 10.0 VOLTS?

SC-1D ON THE

ACTUATED.

BRAKE SWITCH CONN.

NEXT PAGE.

FIG. 2

YES

USING THE SERVICE
MANUAL PROCEDURE,

WAS THE BRAKE

NO

ADJUST THE BRAKE

CHECK THE BRAKE

SWITCH ADJUSTMENT

SWITCH.*

SWITCH ADJUSTMENT.

OK?

YES

REPLACE THE BRAKE

SWITCH.*

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539