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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