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Self-Diagnostic System

NOTE: Self-diagnostic tests are written specifically for Chrysler's Diagnostic Readout Box (DRBIII®) scan tool. A generic scan tool may not be capable of performing all necessary test functions.
  1. Perform pretest inspection. See PRETEST INSPECTION  under TROUBLE SHOOTING. If pretest inspection procedure has been performed, go to next step.
  2. Turn ignition off. Connect scan tool to Data Link Connector (DLC). DLC is located on bottom of instrument panel, to left of brake pedal. See Figure. Turn ignition on. Using scan tool, attempt to communicate with all modules. If communication is established with all modules, go to next step. If communication is not established with any module, perform appropriate test under COMMUNICATIONS  under SYSTEM TESTS.
  3. NOTE: Scan tool messages are listed by system affected and not by module retrieved from. Perform appropriate test under appropriate section under SYSTEM TESTS .
  4. Using scan tool, retrieve Diagnostic Trouble Codes (DTC) from all modules. If any DTCs exist, perform corresponding DTC test(s) under affected system under SYSTEM TESTS . See DIAGNOSTIC TROUBLE CODE IDENTIFICATION  table. If no DTCs exist, repair by corresponding symptom test(s) under affected system under SYSTEM TESTS . See SYMPTOM IDENTIFICATION  table.
DIAGNOSTIC TROUBLE CODE IDENTIFICATION

Affected System (1) DTC
Air Bag (2)
Communications BUS +/- SIGNAL OPEN FROM SKIM 
(3) NO SKIM MESSAGES RECEIVED
BUS +/- SIGNALS OPEN FROM INSTRUMENT CLUSTER 
BUS +/- SIGNALS OPEN FROM RKE 
COMPLETE PCI BUS FAILURE 
NO RESPONSE FROM ACM 
NO RESPONSE FROM CAB CONTROLLER 
(4) ABS MESSAGES NOT RECEIVED BY MIC
NO RESPONSE FROM PCI BUS (PCI BUS) 
NO RESPONSE FROM PCM (SCI ONLY) 
Instrument Cluster ACM MESSAGES NOT RECEIVED BY MIC 
FUEL LEVEL SENSOR OPEN 
FUEL LEVEL SENSOR SHORT 
PANEL DIMMER OPEN 
SBEC MESSAGES NOT RECEIVED BY MIC 
(5) PCM MESSAGE NOT RECEIVED
SKIM MESSAGE NOT RECEIVED BY MIC 
Vehicle Theft Security System (VTSS) DECK LID SECURITY (KNOCKOUT) SWITCH MISSING 
HOOD AJAR SWITCH MISSING 
NO AIR BAG MESSAGES RECEIVED 
NO SWITCH CONFIGURATION SPECIFIED 
P/N MISMATCH 
VTSS PREVIOUSLY ENABLED 
(1) Perform corresponding test(s) under affected system under SYSTEM TESTS .
(2) For air bag system diagnostic trouble codes and testing procedures, see appropriate lemon-25® AIR BAG SERVICE & REPAIR, DOMESTIC & IMPORTED manual.
(3) Perform BUS +/- SIGNAL OPEN FROM SKIM  test.
(4) Perform NO RESPONSE FROM CAB CONTROLLER 
test.
(5) Perform SBEC MESSAGES NOT RECEIVED BY MIC 
test.
SYMPTOM IDENTIFICATION

Affected System (1)Test
Instrument Cluster ANY LED INDICATOR FAILS SELF-TEST 
ANY OR ALL GAUGES INOPERATIVE 
CLUSTER ILLUMINATION PROBLEM 
COURTESY LIGHTS ON AT ALL TIMES 
COURTESY LIGHTS TOTALLY INOPERATIVE 
FOGLIGHT INDICATOR INOPERATIVE 
RED BRAKE WARNING INDICATOR NOT OPERATING PROPERLY 
VF DISPLAY FAILS SELF-TEST 
Power Door Locks/RKE ALL DOOR LOCKS INOPERATIVE 
ALL DOORS (EXC DRIVER) FAIL TO LOCK & UNLOCK 
ALL DOORS (EXCEPT DRIVER) FAIL TO LOCK 
ALL DOORS (EXCEPT DRIVER) FAIL TO UNLOCK 
ALL LOCKS INOPERATIVE FROM DRIVER DOOR LOCK SWITCH 
ALL LOCKS INOPERATIVE FROM PASSENGER DOOR LOCK SWITCH 
AUTOMATIC DOOR LOCK INOPERATIVE 
DECK LID SOLENOID INOPERATIVE 
DOORS LOCKABLE WITH KEY IN IGNITION & DRIVER DOOR OPEN 
DRIVER DOOR FAILS TO LOCK & UNLOCK 
DRIVER DOOR FAILS TO UNLOCK 
LEFT REAR DOOR FAILS TO LOCK & UNLOCK 
PASSENGER DOOR FAILS TO LOCK & UNLOCK 
RIGHT REAR DOOR FAILS TO LOCK & UNLOCK 
RKE TRANSMITTER INOPERATIVE 
Vehicle Theft Security System (VTSS) HEAD LIGHTS FAIL TO FLASH DURING ALARM 
HORN FAILS TO SOUND DURING ALARM 
OPEN DRIVER DOOR FAILS TO TRIP ALARM 
OPEN PASSENGER DOOR FAILS TO TRIP ALARM 
PARKING LIGHTS FAIL TO FLASH DURING ALARM 
VTSS FAILS TO ARM/DISARM FROM DRIVER CYLINDER LOCK SWITCH 
VTSS FAILS TO ARM/DISARM FROM PASSENGER DOOR CYLINDER LOCK SWITCH 
VTSS INDICATOR FAILS TO FLASH 
VTSS INDICATOR STAYS ON STEADY DURING ARMING 
(1) Perform corresponding test(s) under affected system under SYSTEM TESTS .