2000 CHRYSLER CARAVAN Service Manual

TEST SC-3ACHECKING SPEED CONTROL OPERATION
Perform TEST SC-1A Before Proceeding
*Perform Verification TEST VER-3A. **Check connectors - Clean / repair as necessary.
NO
YES
S
P
E
E
D
C
O
N
T
R
O
L
T
E
S
T
S
379
ProCarManuals.com

TEST SC-3ACONTINUED - CHECKING SPEED CONTROL OPERATION
FIG.1
FIG.2
S
P
E
E
D
C
O
N
T
R
O
L
T
E
S
T
S
380
ProCarManuals.com

TEST SC-3ACONTINUED - CHECKING SPEED CONTROL OPERATION
*Perform Verification TEST VER-3A. **Check connectors - Clean / repair as necessary.
TEST SC-3A KEY OFF.
CONTINUED FROM
THE PREVIOUS DISCONNECT THE BRAKE
PAGE. LAMP SWITCH HARNESS
CONNECTOR.**
USING A VOLTMETER, REPAIR THE BRAKE
PROBE BRAKE LAMP IS THE VOLTAGE NO LAMP SWITCH FUSED
SWITCH HARNESS ABOVE 9.0 VOLTS? BATTERY SUPPLY
CONNECTOR CAVITY 6. CIRCUIT FOR AN
FIG.1 OPEN.*
YES
CONNECT A JUMPER DOES THE DRB
BETWEEN BRAKE LAMP DISPLAY CHANGE YES ADJUST OR REPLACE
SWITCH HARNESS TURN IGNITION ON. FROM "RELEASED" TO THE BRAKE LAMP
CONNECTOR CAVITIES "PRESSED"? SWITCH.*
5 AND 6. FIG.1
NO
REMOVE THE JUMPER. AT THE BRAKE LAMP REPAIR THE PRIMARY
USING A VOLTMETER, SWITCH HARNESS IS THE VOLTAGE NO BRAKE SWITCH
MEASURE THE CONNECTOR CAVITY 5. BELOW 1.0 VOLT? SIGNAL CIRCUIT FOR
PRIMARY SWITCH A SHORT TO
SIGNAL CIRCUIT... FIG.1 VOLTAGE.*
YES
KEY OFF. USING AN OHMMETER, REPAIR THE PRIMARY
MEASURE RESISTANCE IS THE RESISTANCE NO BRAKE SWITCH
DISCONNECT THE ECM OF THE PRIMARY BRAKE BELOW 5.0 OHMS? SIGNAL CIRCUIT FOR
HARNESS SW SIGNAL CKT. AN OPEN.*
CONNECTORS.** FIG.2
YES
REPLACE THE ENGINE
CONTROL MODULE.*
S
P
E
E
D
C
O
N
T
R
O
L
T
E
S
T
S
381
ProCarManuals.com

TEST SC-3BCHECKING SPEED CONTROL OPERATION
Perform TEST SC-3A Before Proceeding
FIG.1
S
P
E
E
D
C
O
N
T
R
O
L
T
E
S
T
S
382
ProCarManuals.com

TEST SC-3BCHECKING SPEED CONTROL OPERATION
Perform TEST SC-3A Before Proceeding
*Perform Verification TEST VER-3A. **Check connectors - Clean / repair as necessary.
START TEST
SC-3B. TURN IGNITION OFF.
DISCONNECT THE KEY ON. USING A
BRAKE LAMP SWITCH VOLTMETER, MEASURE IS THE VOLTAGE NO CONTINUE TEST
HARNESS VOLTAGE AT CAVITY 1. ABOVE 9.0 VOLTS? SC-3B ON THE
CONNECTOR.** NEXT PAGE.
FIG.1
YES
USING A JUMPER WHILE MONITORING DID THE DRB
WIRE, CONNECT THE DRB. DISPLAY CHANGE YES ADJUST OR REPLACE
BRAKE LAMP SWITCH FROM "PRESSED" TO THE BRAKE LAMP
CONNECTOR CAVITY 1 "RELEASED"? SWITCH.*
TO GROUND... FIG.1
NO
USING AN OHMMETER,REPAIR THE OPEN
MEASURE THE IS THE RESISTANCE YES SECONDARY BRAKE
RESISTANCE BETWEEN ABOVE 10.0 OHMS? LAMP SWITCH GROUND
CONNECTOR CAVITY 2CIRCUIT.*
AND GROUND. FIG.1
NO
REPLACE THE ENGINE
CONTROL MODULE.*
S
P
E
E
D
C
O
N
T
R
O
L
T
E
S
T
S
383
ProCarManuals.com

TEST SC-3BCONTINUED - CHECKING SPEED CONTROL OPERATION
FIG.1
FIG.2
S
P
E
E
D
C
O
N
T
R
O
L
T
E
S
T
S
384
ProCarManuals.com

TEST SC-3BCONTINUED - CHECKING SPEED CONTROL OPERATION
*Perform Verification TEST VER-3A. **Check connectors - Clean / repair as necessary.
TEST SC-3B
CONTINUED FROM DISCONNECT THE ECM
THE PREVIOUS TURN IGNITION OFF. HARNESS
PAGE. CONNECTORS.**
OF THE SECONDARY REPAIR OPEN IN THE
USING AN OHMMETER, BRAKE LAMP SWITCH IS THE RESISTANCE NO SECONDARY BRAKE
MEASURE THE SIGNAL CIRCUIT. BELOW 5.0 OHMS? LAMP SWITCH SIGNAL
RESISTANCE...CIRCUIT.*
FIG.1
YES
THE BRAKE LAMP REPAIR SHORT TO
USING AN OHMMETER, SWITCH CONNECTOR IS THE RESISTANCE YES GROUND IN THE
MEASURE RESISTANCE CAVITY 1 AND GROUND. BELOW 5.0 OHMS? SECONDARY BRAKE
BETWEEN... LAMP SWITCH SIGNAL
FIG.2 CIRCUIT.*
NO
REPLACE THE ENGINE
CONTROL MODULE.*
S
P
E
E
D
C
O
N
T
R
O
L
T
E
S
T
S
385
ProCarManuals.com

TEST SC-4ACHECKING SPEED CONTROL OPERATION
Perform TEST SC-1A Before Proceeding
FIG.1
FIG.2
S
P
E
E
D
C
O
N
T
R
O
L
T
E
S
T
S
386
ProCarManuals.com