check engine CHRYSLER CARAVAN 2000 Service Manual

TEST NS-2AREPAIRING A NO RESPONSE CONDITION
Perform TEST NS-SEL Before Proceeding
*Perform Verification TEST VER-1A. **Check connectors - Clean / repair as necessary.
START TEST DOES THE VEHICLE YES PERFORM TEST
NS-2A. START? NS-2B.
NO
KEY OFF. WITH AN OHMMETER, IS THE RESISTANCE
MEASURE RESISTANCE ABOVE 5.0 OHMS FOR YES REPAIR THE OPEN
DISCONNECT THE ECM OF THE PCM GND CKTS ANY OF THE ECM GROUND.*
HARNESS AT HARNESS CAVITIES MEASUREMENTS?
CONNECTORS.** 1 AND 27. FIG.1
NO
KEY ON. USING A AT ECM HARNESS REPAIR OPEN OR
VOLTMETER, MEASURE CONNECTOR CAVITY 47. IS THE VOLTAGE NO SHORT TO GROUND IN
THE FUSED IGNITION ABOVE 10.0 VOLTS? THE FUSED IGNITION
SWITCH OUTPUT SWITCH OUTPUT
CIRCUIT... FIG.1 CIRCUIT.*
YES
KEY OFF. USING A VOLTMETER REPAIR OPEN FUSE
REMOVE THE DIESEL PROBE DIESEL POWER IS THE VOLTAGE NO OR FUSED BATTERY
POWER RELAY. RELAY CONNECTOR ABOVE 10.0 VOLTS? CIRCUIT TO DIESEL
CAVITY 30 (IN PDC). POWER RELAY.*
KEY ON. FIG.2
YES
KEY OFF. CONNECT A MEASURE VOLTAGE AT IS THE VOLTAGE
JUMPER WIRE ACROSS ECM HARNESS ABOVE 10.0 VOLTS NO REPAIR OPEN DIESEL
RELAY CONNECTOR CONNECTOR CAVITIES FOR EACH POWER RELAY OUTPUT
CAVATIES 30 AND 87. 2 AND 28. MEASUREMENT? CIRCUIT(S).*
FIG. 1 AND 2
YES
KEY OFF. RECONNECT WITH JUMPER WIRE
THE ENGINE CONTROL STILL CONNECTED, DOES THE VEHICLE NO REPLACE THE ENGINE
MODULE HARNESS ATTEMPT TO START START? CONTROL MODULE.*
CONNECTORS. VEHICLE.
YES
CONTINUE TEST
NS-2A ON THE
NEXT PAGE.
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TEST NS-2BCONTINUED - REPAIRING A NO RESPONSE CONDITION
*Perform Verification TEST VER-1A. **Check connectors - Clean / repair as necessary.
TEST NS-2B CONNECT THE DRB TO
CONTINUED FROM A FUNCTIONAL DATA
THE PREVIOUS LINK ON ANOTHER
PAGE. VEHICLE.
REPLACE THE
WITH THE DRB, DID THE DRB NO INITIAL VEHICLE'S
TURN IGNITION ON. ATTEMPT TO READ DISPLAY "NO ENGINE CONTROL
TROUBLE CODES. RESPONSE"? MODULE.*
YES
SUBSTITUTE ANOTHER WITH THE DRB, DID THE DRB NO REPLACE THE DRB
DRB ADAPTER CABLE. ATTEMPT TO READ DISPLAY "NO ADAPTER CABLE.*
TROUBLE CODES. RESPONSE"?
YES
HAVE THE DRB
REPAIRED OR
REPLACED.*
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TEST NS-3BREPAIRING - NO START
Perform TEST NS-3A Before Proceeding
*Perform Verification TEST VER-1A. **Check connectors - Clean / repair as necessary.
START TEST
NS-3B. TURN IGNITION OFF.
DISCONNECT THE
DISCONNECT THE ECM BODY CONTROL
HARNESS MODULE HARNESS
CONNECTORS.** CONNECTORS.**
USING AN OHMMETER,
MEASURE RESISTANCE IS THE RESISTANCE YES REPAIR THE OPEN
OF THE IMMOBILIZER ABOVE 5.0 OHMS? IMMOBILIZER SIGNAL
SIGNAL CIRCUIT. CIRCUIT.*
FIG.1
NO
ENGINE CONTROL REPAIR THE
MEASURE RESISTANCE MODULE HARNESS IS THE RESISTANCE YES IMMOBILIZER SIGNAL
BETWEEN ... CONNECTOR CAVITY BELOW 5.0 OHMS? CIRCUIT FOR A
38 AND GROUND. SHORT TO GROUND.*
FIG. 1
NO
USING A VOLTMETER, REPAIR THE
MEASURE VOLTAGE AT IS THE VOLTAGE YES IMMOBILIZER SIGNAL
TURN IGNITION ON. ECM HARNESS ABOVE 1.0 VOLT? CIRCUIT FOR A
CONNECTOR CAVITY 38. SHORT TO VOLTAGE.*
FIG. 1
NO
CONTINUE TEST
NS-3B ON THE
NEXT PAGE.
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TEST NS-3BCONTINUED - REPAIRING - NO START
*Perform Verification TEST VER-1A. **Check connectors - Clean / repair as necessary.
TEST NS-3B TURN IGNITION OFF.
CONTINUED FROM RECONNECT THE
THE PREVIOUS ENGINE CONTROL
PAGE. MODULE HARNESS
CONNECTORS.
KEY ON. MEASURE
USE AN AMMETER IN AMPERAGE FROM BCM IS THE AMPERAGE NO REPLACE THE ENGINE
THE FOLLOWING HARNESS CONNECTOR BETWEEN 1.0 AND CONTROL MODULE.*
STEP. CAVITY 72 TO GROUND. 1.4 MA?
FIG.1
YES
RECONNECT THE BODY USING THE DRB
CONTROL MODULE OSCILLOSCOPE
HARNESS FUNCTION, SELECT
CONNECTORS. "LAB SCOPE".
SET VOLTAGE RANGE TO KEY ON. USING
+20.0V. SET TIME OSCILLOSCOPE LEAD,
RANGE TO 0.1S/DIV. BACKPROBE ECM
SET PROBE TO X10. HARNESS CONNECTOR
FIG.2 CAVITY 38. FIG.1
NOTE: AN IMMOBILIZER DOES THE DRB DISPLAY
SIGNAL WILL CYCLE HI SHOW THE 12 VOLT YES REPLACE THE ENGINE
TO LO SIMILAR TO THE IMMOBILIZER SIGNAL CONTROL MODULE.*
PATTERN SHOWN IN CYCLING HI AND LO?
FIG.2 FIG.2
NO
REPLACE THE BODY
CONTROL MODULE.*
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TEST NS-4AREPAIRING A START AND STALL CONDITION
Perform TEST NS-SEL Before Proceeding
At this point in the diagnostic test procedure it is assumed that all of the engine electrical systems
are operating as designed and are not the cause of a start and stall, or a no start problem. The
following additional items should be checked as possible mechanical problems. Any one of these
items can produce a start and stall, or no start condition; none can be overlooked as a possible
cause.
1. ENGINE VALVE TIMINGÐ must be within specifications
2. ENGINE COMPRESSIONÐ must be within specifications
3. ENGINE EXHAUST SYSTEMÐ must be free of any restrictions
4. FUELÐ must be free of contamination
5. FUEL FILTERÐ must be free of any restrictions
6. INTAKE AIR DUCTÐ passages must be free of any debris
Always look for any Technical Service Bulletins that may relate to this problem.
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TEST NS-5ACHECKING THE ENGINE MECHANICAL SYSTEMS
Perform TEST NS-SEL Before Proceeding
NOTES
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TEST NS-5ACHECKING THE ENGINE MECHANICAL SYSTEMS
Perform TEST NS-SEL Before Proceeding
*Perform Verification TEST VER-1A. **Check connectors - Clean / repair as necessary.
KEY OFF. USING
START TEST SERVICE MANUAL IS THE VALVE NO REPAIR VALVE
NS-5A. PROCEDURES, CHECK TIMING WITHIN TIMING AS
ENGINE VALVE SPECIFICATIONS? NECESSARY.
TIMING.
YES
USING SERVICE
MANUAL PROCEDURES, IS ENGINE NO REPAIR THE ENGINE
CHECK ENGINE COMPRESSION WITHIN AS NECESSARY.
COMPRESSION. SPECIFICATIONS?
YES
USING SERVICE
MANUAL IS INJECTION PUMP NO REPAIR INJECTION
PROCEEDURES, CHECK TIMING WITHIN PUMP TIMING AS
INJECTION PUMP SPECIFICATIONS? NECESSARY.
TIMING.
YES
TEST COMPLETED.
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TEST VER-2AROAD TEST VERIFICATION
Inspect the vehicle to ensure that all engine components are connected. Reassemble and reconnect
all components as necessary.
If this verification procedure is being performed after a NO TROUBLE CODE test, do the
following:
1. Check to see if the initial symptom still exists.
2. If the initial or another symptom exists, the repair is not complete. Check all pertinent Technical
Service Bulletins and return toTEST NTC-1Aif necessary.
For previously read trouble codes that have not been dealt with, return toDTC TESTand follow the
path specified; otherwise, continue.
If the engine control module has not been changed:
1. Connect the DRB to the data link connector and erase trouble codes.
2. With the DRB, reset all values in the adaptive memory.
3. Disconnect the DRB.
4. Turn the ignition off for at least 10 seconds.
Ensure no trouble code remains by doing the following:
1. If this test is for anA/C Relay Control Circuit,drive the vehicle for at least five minutes with
the A/C on. For some of the drive, go at least 40 mph; at some point stop the car and turn the
engine off for 10 seconds or more then restart and continue. Upon completion of the road test,
turn the engine off, and read trouble codes with the DRB.
2. If the repaired code has reset, the repair is not complete. Check all related Technical Service
Bulletins and return toDTC TESTif necessary. If another trouble code has set, return toDTC
TESTand follow the path specified for that trouble code. If there are no trouble codes, the
repair was successful and is now complete.
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TEST VER-3ASPEED CONTROL VERIFICATION
Inspect the vehicle to ensure that all engine components are connected. Reassemble and reconnect
all components as necessary.
If the engine control module has been changed, do the following:
1. If the vehicle is equipped with a factory theft alarm, start the vehicle at least 20 times so that
the alarm system may be activated when desired.
Connect the DRB to the data link connector and erase the codes.
Ensure no other speed control problems remain by doing the following:
1. Road test the vehicle at a speed above 35 mph.
2. Turn the speed control ON/OFF switch to the ON position.
3. Depress and release the SET switch. If the speed control did not engage, the repair is not
complete.*
4. Quickly depress and release the RESUME/ACCEL switch. If the vehicle speed did not increase
by 2 mph, the repair is not complete.*
5. Using caution, depress and release the brake pedal. If the speed control did not disengage, the
repair is not complete.*
6. Bring the vehicle speed back up to 35 mph.
7. Depress the RESUME/ACCEL switch. If the speed control did not resume the previously set
speed, the repair is not complete.*
8. Hold down the DECEL switch. If the vehicle did not decelerate, the repair is not complete.
9. Ensure the vehicle speed is greater than 35 mph and release the SET switch. If the vehicle did
not adjust and set a new vehicle speed, the repair is not complete.*
10. With Speed Control engaged, depress the ON/OFF switch. If the speed control did not
disengage, the repair is not complete.*
If the vehicle successfully passed all of the previous tests, the speed control system is now
functioning as designed. The repair is now complete.
*Check for Technical Service Bulletins that pertain to this speed control problem and then, if
necessary, return toDTC TEST.
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rough,
un-stable or
erratic idle
stallingThe engine runs unevenly at idle and causes the engine to shake if it is
severe enough. The engine idle rpm may vary (called ``hunting''). This
condition may cause stalling if it is severe enough.
SKIMSentry key immobilizer module
SKISSentry key immobilizer system
start and
stallThe engine starts but immediately dies.
surgeengine rpm fluctuation without corresponding change in throttle position
sensor
SRCsignal range check
VSSvehicle speed sensorG
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