immobilizer CHRYSLER CARAVAN 2000 User Guide

TEST SK-1AIDENTIFYING SENTRY KEY IMMOBILIZER PROBLEMS
NOTES
S
E
N
T
R
Y
K
E
Y
I
M
M
O
B
I
L
I
Z
E
R
S
Y
S
T
E
M
286
ProCarManuals.com

TEST SK-1AIDENTIFYING SENTRY KEY IMMOBILIZER SYSTEM PROBLEMS
NOTE:The Sentry Key Immobilizer System (SKIS) diagnosis may require usage of the customer's
additional keys to verify the cause of the system failure. In the event that the Sentry Key Immobilizer
Module (SKIM) needs replacing, all of the keys previously programmed into the SKIM's memory
must be programmed into the new SKIM.THEREFORE IT IS IMPORTANT THAT ALL OF THE
CUSTOMER'S KEYS PROGRAMMED FOR THE VEHICLE BE OBTAINED PRIOR TO BEGIN-
NING VEHICLE DIAGNOSIS.
NOTE:It is necessary to obtain the four-digit Personal Identification Number (PIN) from the
customer or the vehicle invoice. The PIN is required to perform certain SKIM tasks using the DRB.
NOTE:It is very important that the ECM/BCM is programmed with the correct Vehicle Identification
Number (VIN). Incorrect VIN programming may result in incorrect diagnosis and unnecessary
component replacement. Use the DRB to verify the correct VIN and country code are programmed
into the SKIM.
1. The battery must be fully charged for any test in this manual.
2. Attempt to start the engine. Crank for up to 10 seconds if necessary.
3. Connect the DRB to the diagnostic connector and select ``Theft Alarm'' then ``SKIM''.
If the DRB displays ``No Response''..................................perform test 1B
NOTE:If the DRB screen is blank or has a DRB error message displayed, go toGeneral
Information Section 3.5in this manual.
4. With the DRB, read and record SKIM trouble codes.
5. If diagnostic trouble code are displayed, refer to the diagnostic trouble code list on the next page
for the appropriate test.
NOTE:For all component locations, seeGeneral Information Section 4.0in this manual.
DIAGNOSTIC TROUBLE CODE (DTC) DISPLAYED
DIAGNOSTIC TEST
ANTENNA FAILURE**
COP FAILURE**
EEPROM FAILURE**
PCM STATUS FAILURE SK-2A
INTERNAL FAULT**
RAM FAILURE**
ROLLING CODE FAILURE SK-3A
SERIAL LINK EXTERNAL FAULT SK-4A
STACK OVERFLOW FAILURE **
TRANSPONDER COMMUNICATION FAILURE SK-5A
TRANSPONDER CRC (CYCLIC REDUNDANCY CHECK)
FAILURESK-6A
TRANSPONDER ID MISMATCH SK-7A
TRANSPONDER RESPONSE MISMATCH SK-8A
VIN MISMATCHSK-9A
**These trouble codes indicate an internal SKIM fault. Using the DRB, clear SKIM trouble code(s).
Perform several key cycles, leaving the key on for a minimum of 30 seconds per cycle. Using the
DRB, read SKIM trouble codes. If the trouble code is present, replace the SKIM.
NOTE:An intermittent start and stall condition accompanied with a transponder DTC can be caused
by the presence of a non-programmed key or key programmed to another vehicle, near the SKIM
antenna (ignition halo). This can occur if the customer has a key holder (ring) that contains more
than one key equipped with a transponder chip.
After replacement of the Sentry Key Immobilizer Module (SKIM) seeGeneral Information Section 8.0
for SKIM initialization.
S
E
N
T
R
Y
K
E
Y
I
M
M
O
B
I
L
I
Z
E
R
S
Y
S
T
E
M
287
ProCarManuals.com

TEST SK-1BSKIM COMMUNICATION
Perform TEST SK-1A Before Proceeding
*Perform Verification TEST VER-1A. **Check connectors - Clean / repair as necessary.
USING THE DRB, REFER TO "BODY
START TEST ATTEMPT TO CAN YOU NO DIAGNOSTIC
SK-1B. COMMUNICATE WITH COMMUNICATE WITH PROCEDURES" MANUAL A
THE BODY CONTROL THE BCM? TO DIAGNOSE VEHICLE
MODULE. COMMUNICATION.
YES
TURN IGNITION OFF. USING AN OHMMETER,
DISCONNECT THE MEASURE BETWEEN IS THE RESISTANCE NO REPAIR THE OPEN
SKIM HARNESS GROUND AN SKIM BELOW 5.0 OHMS? GROUND CIRCUIT.*
CONNECTOR.** HARNESS CONNECTOR
CAVITY 2. FIG.1
YES
USING A VOLTMETER,
MEASURE THE BATTERY IS THE VOLTAGE NO REPAIR THE OPEN
SUPPLY CIRCUIT. ABOVE 10.0 VOLTS? BATTERY SUPPLY
CIRCUIT.*
FIG.1
YES
USING A VOLTMETER,
MEASURE THE IGNITION IS THE VOLTAGE NO REPAIR THE OPEN
TURN IGNITION ON. SUPPLY CIRCUIT. ABOVE 10.0 VOLTS? IGNITION SUPPLY
CIRCUIT.*
FIG.1
YES
WAIT 2 MINUTES MEASURE BOTH CCD IS THE VOLTAGE
BEFORE CONTINUING. BUS CIRCUITS AT BETWEEN 2.3 AND NO REPAIR THE OPEN
THE SKIM HARNESS 2.6 VOLTS FOR BOTH CCD BUS
WITH THE IGNITION CONNECTOR. MEASUREMENTS? CIRCUIT(S).*
STILL ON... FIG.1
YES
TURN IGNITION OFF. KEY ON.
CAN YOU NO REPLACE THE SENTRY
RECONNECT THE SKIM ATTEMPT TO COMMUNICATE WITH KEY IMMOBILIZER
HARNESS CONNECTOR. COMMUNICATE WITH THE SKIM? MODULE.*
THE SKIM.
YES
TEST COMPLETE.*
S
E
N
T
R
Y
K
E
Y
I
M
M
O
B
I
L
I
Z
E
R
S
Y
S
T
E
M
289
ProCarManuals.com

TEST SK-2ACONTINUED - REPAIRING - PCM STATUS FAILURE
*Perform Verification TEST VER-1A. **Check connectors - Clean / repair as necessary.
TEST SK-2A
CONTINUED FROM
THE PREVIOUS TURN IGNITION OFF.
PAGE.
USING THE SCHEMATIC CHECK THE WIRING
AS A GUIDE, INSPECT AND CONNECTORS FOR ARE ANY OF THESE YES REPAIR AS
THE CCD BUS CIRCUITS POOR TERMINAL CONDITIONS NECESSARY.*
BETWEEN THE BCM AND CONTACT, CORROSION PRESENT?
SKIM. OR DAMAGE.
NO
REPLACE THE SENTRY
KEY IMMOBILIZER USING THE DRB,
MODULE.** ERASE SKIM CODES.
SEE GENERAL INFO 8.0
DRIVE VEHICLE. USING THE DRB, DOES THIS CODE YES REPLACE THE BODY
CHECK FOR SKIM APPEAR? CONTROL MODULE.*
PERFORM SEVERAL CODES.
KEY CYCLES.
NO
TEST COMPLETE.
S
E
N
T
R
Y
K
E
Y
I
M
M
O
B
I
L
I
Z
E
R
S
Y
S
T
E
M
293
ProCarManuals.com

TEST SK-3ACONTINUED - REPAIRING - ROLLING CODE FAILURE
*Perform Verification TEST VER-1A. **Check connectors - Clean / repair as necessary.
TEST SK-3A
CONTINUED FROM
THE PREVIOUS TURN IGNITION OFF.
PAGE.
USING THE SCHEMATIC CHECK THE WIRING
AS A GUIDE, INSPECT AND CONNECTORS FOR ARE ANY OF THESE YES REPAIR AS
THE CCD BUS CIRCUITS POOR TERMINAL CONDITIONS NECESSARY.*
BETWEEN THE BCM AND CONTACT, CORROSION PRESENT?
SKIM. OR DAMAGE.
NO
REPLACE THE SENTRY
KEY IMMOBILIZER USING THE DRB,
MODULE.** ERASE SKIM CODES.
SEE GENERAL INFO 8.0
DRIVE VEHICLE. USING THE DRB, DOES THIS CODE YES REPLACE THE BODY
CHECK FOR SKIM APPEAR? CONTROL MODULE.*
PERFORM SEVERAL CODES.
KEY CYCLES.
NO
TEST COMPLETE.
S
E
N
T
R
Y
K
E
Y
I
M
M
O
B
I
L
I
Z
E
R
S
Y
S
T
E
M
297
ProCarManuals.com

TEST SK-4ACONTINUED - REPAIRING - SERIAL LINK EXTERNAL FAULT
*Perform Verification TEST VER-1A. **Check connectors - Clean / repair as necessary.
TEST SK-4A WITH IGNITION STILL CAN YOU REFER TO BODY
CONTINUED FROM ON, USE THE DRB AND COMMUNICATE WITH NO DIAGNOSTIC
THE PREVIOUS ATTEMPT TO THE BODY CONTROL PROCEDURES
PAGE. COMMUNICATE TO THE MODULE? MANUAL.
BODY CONTROL MODULE.
YES
TURN IGNITION OFF.
USING THE SCHEMATIC CHECK THE WIRING
AS A GUIDE, INSPECT AND CONNECTORS FOR ARE ANY OF THESE YES REPAIR AS
THE CCD BUS CIRCUITS POOR TERMINAL CONDITIONS NECESSARY.*
BETWEEN THE BCM AND CONTACT, CORROSION PRESENT?
SKIM. OR DAMAGE.
NO
REPLACE THE SENTRY
KEY IMMOBILIZER USING THE DRB,
MODULE.** ERASE SKIM CODES.
SEE GENERAL INFO 8.0
TEST DRIVE THE
VEHICLE. USING THE DRB, DOES THIS CODE YES REPLACE THE BODY
CHECK FOR SKIM APPEAR? CONTROL MODULE.*
PERFORM SEVERAL CODES.
KEY CYCLES.
NO
TEST COMPLETE.
S
E
N
T
R
Y
K
E
Y
I
M
M
O
B
I
L
I
Z
E
R
S
Y
S
T
E
M
301
ProCarManuals.com

TEST NS-SELNO START SELECTION MENU
NOTE:The battery must be fully charged before performing any test in this manual.
NOTE:If the engine will not crank or cranks but will not run, be sure to check the Sentry Key
Immobilizer Module (SKIM) for proper communication and trouble codes.
NOTE:With the DRB, attempt to read ECM trouble codes. If the DRB is unable to communicate with
the ECM, perform test NS-2A. If there are any trouble codes present they must be repaired before
continuing with the No Start Symptom diagnostics.
Below you will find a recommended procedure to correct a No Start Problem by symptom. They
should be performed in the order that they are listed.
Repairing a No Crank Condition..............................................NS-1A
Repairing a No Response Condition...........................................NS-2A
Repairing a No Start Condition................................................NS-3A
Repairing a Start and Stall Condition...........................................NS-4A
Checking the Engine Mechanical Systems......................................NS-5A
NOTE:A failed engine coolant temperature (ECT) sensor can cause a cranks but will not run or an
extended cranking before starting condition. This occurs when the ECT sensor calibration fails
(sensor indicates engine temp is warmer than actual engine temp) and the ECM cannot command
proper fuel quantity to the injection pump.
NOTE:For all component locations seeGeneral Information Section 4.0 in this manual.
N
O
S
T
A
R
T
T
E
S
T
S
392
ProCarManuals.com

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.
N
O
S
T
A
R
T
T
E
S
T
S
415
ProCarManuals.com

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.*
N
O
S
T
A
R
T
T
E
S
T
S
417
ProCarManuals.com

TEST VER-1ANO START VERIFICATION
Important Note:
If the Engine Control Module, Sentry Key Immobilizer Module or Body Control Module have been
changed the Vehicle Identification Number (VIN) and Secret Key data must be updated to enable the
vehicle to start and run. Refer to GENERAL INFORMATION SECITON 8.0 for programming
procedures.
Inspect the vehicle to ensure that all engine components are connected. Reassemble and reconnect
components as necessary.
Inspect the engine oil for contamination. If it is contaminated, change the oil and filter.
Using the DRB, clear all diagnostic trouble codes (DTC's).
Turn the ignition off for 10 seconds.
Attempt to start the vehicle.
If the engine isunableto start, look for any Technical Service Bulletins that may relate to this
condition. Return toDTC TESTif necessary.
The repair is now complete.
V
E
R
I
F
I
C
A
T
I
O
N
T
E
S
T
422
ProCarManuals.com