Body Control Computer Dodge Ram Van III

IDENTIFICATION

BODY IDENTIFICATION

MODULE APPLICATIONS

DESCRIPTION

The body control computer system consists of a combination of modules that communicate over the Chrysler Collision Detection (CCD) bus system. Through the CCD or PCI bus, information related to the operation of vehicle components and circuits are relayed to the appropriate system module(s). This reduces the complexity of vehicle wiring and size of wiring harness.

Body control computer systems covered in BODY CONTROL COMPUTER TESTS are as follows

1. Chime system
2. Compass/Mini-Trip Computer (CMTC)
3. Door ajar system
4. Exterior lighting
5. Instrument cluster
6. Interior lighting
7. Intermittent wipers
8. Mechanical Instrument Cluster (MIC)
9. Power door locks
10. Power windows
11. Remote keyless entry
12. Smart key immobilizer system
13. Vehicle Information System (VIC)
14. Vehicle Theft Security System (VTSS).

Body control computer fault messages are accessed through 16-pin Data Link Connector (DLC) using Chrysler's Diagnostic Readout Box (DRB) scan tool or generic scan tool. DLC is located on left side of steering column, above brake pedal.

Note. Self-diagnostic tests are written specifically for Chrysler's Diagnostic Readout Box (DRB) scan tool. A generic scan tool may not be capable of performing all necessary test functions.

CCD BUS SYSTEM

The Chrysler Collision Detection (CCD) bus is a pair of twisted wires traveling from module-to-module receiving and delivering coded information. The code identifies the message and its importance. When multiple messages attempt to access CCD bus at once, code assigns priority ranking.

The 2 twisted wires used by the CCD bus system are called bus "+" (positive) and bus "-" (negative). Both wires carry approximately 2.5 volts. The network consists of some modules with "bias" and some with "termination".

Bias is the part of the voltage divider network which places both bus "+" and bus "-" at 2.5 volts. Termination is the part of the circuitry required to complete the voltage divider network and also provide some electromagnetic protection for the CCD bus. Terminations in all CCD applications have approximately 120 ohms resistance.

CENTRAL TIMER MODULE

The Central Timer Module (CTM) high line model only communicates over CCD bus line. CTM controls air bag, chime, courtesy lights, illuminated entry, power door locks, remote keyless entry, speed sensitive intermittent wipers and vehicle theft security system. For module location, see CTM MODULE LOCATION table.

CTM MODULE LOCATION

COMPASS/MINI-TRIP COMPUTER (CMTC)

The CMTC is located in overhead console. This dual-function display provides a digital readout of ambient (outside) temperature and 8 primary compass readings to indicate the direction in which vehicle is facing.

The CMTC is self-calibrated and requires no adjustment. The word CAL will be displayed to indicate that the compass is in the fast calibrating mode. The CAL display may be turned off after the vehicle has completed 3 circles without stopping, in an area free of magnetic disturbance.

If the module displays ambient temperature while the compass display is blank, the vehicle must be demagnetized. If compass display still goes blank after the vehicle is demagnetized, the compass/temperature module must be replaced.

MECHANICAL INSTRUMENT CLUSTER (MIC)

Instrument cluster includes a speedometer, tachometer, fuel gauge, oil pressure gauge, water temperature gauge, voltmeter, Vacuum Fluorescent (VF) display and a series of warning lights.

Powertrain Control Module (PCM) sends signals necessary for the cluster to position gauges. Cluster receives these messages from CCD or PCI bus and translates them into gauge positions. BCM sends status of all indicator lights and dimming level to instrument cluster over CCD or PCI bus when ignition switch is in RUN or START positions. Malfunction (CHECK ENGINE) indicator light status is sent to BCM from PCM over CCD or PCI bus. Vacuum fluorescent odometer/trip display works when ignition switch is in RUN or START positions. BCM stores mileage information that odometer displays. If CCD bus is not functioning, odometer will display dashes instead of the mileage numbers. BCM sends mileage message and dimming level message to vacuum fluorescent display when ignition switch is in the ON position. All other instrument cluster features only work when the ignition switch is in the RUN position.

OVERHEAD TRAVEL INFORMATION SYSTEM (OTIS)

The OTIS provides vehicle operator with supplementary information on a Vacuum Fluorescent (VF) display. The OTIS is located in overhead console. Vehicle operator selects and resets display functions through the use of 4 buttons (US/M, STEP, C/T and RESET). The OTIS obtains most of its information from the CCD or PCI bus.

The OTIS powers up when it senses vehicle (battery) voltage on the ignition input circuit. The OTIS blanks the display, then illuminates all segments of the VF display. During this time, the OTIS sends and receives information over CCD or PCI bus to determine what to display after its 2 second initialization. OTIS will display dashes (- -) for any of the screens for which it did not receive bus messages during the 2 second initialization. Dashes will be replaced by valid information if and when it is received.

VEHICLE THEFT SECURITY SYSTEM (VTSS)

VTSS monitors vehicle doors, hood, trunk key cylinder and ignition for unauthorized operation/entry. When alarm is triggered, the horn will sound for 3 minutes and the parking lights will flash for 15-18 minutes.

When an unauthorized entry into vehicle occurs, the VTSS module signals Powertrain Control Module (PCM) via CCD or PCI bus that it is not okay to start the engine. The PCM then "zeros out" the pulse width of the fuel injectors, thus preventing the engine from starting (start/stall condition). The engine will NOT start until VTSS is disarmed.

Initialization & Verification

An initialization procedure, included in VTSS, requires that vehicle record 20 engine cranking cycles before allowing VTSS module to function. For this reason, VTSS requires verification. To verify VTSS, perform the following: Open driver's door (all others closed). Remove ignition key. Lock doors with power door lock switch. Close driver's door. If VTSS SET light flashes, system is armed and operational. If VTSS SET light does not flash, 20 engine cranking cycles have not occurred or there is a problem with VTSS.

Manual Override Mode & Tamper Alert Mode

The VTSS will not arm if the doors are locked using the key or the manual lock control (manual override mode). If horn sounds 3 times when either front door is unlocked, the alarm was activated/triggered (tamper alert mode).

* PLEASE READ FIRST *

PRETEST INSPECTION

Before proceeding with diagnosis, the following precautions must be followed

1. Vehicle must have a fully charged battery and functional charging system.
2. Always start at TEST 1A: IDENTIFYING VEHICLE EQUIPMENT & SYSTEM PROBLEMS. Starting with any other test may result in incorrect results.
3. Only perform test steps indicated. It is NOT necessary to perform all steps in a test.
4. BODY CONTROL COMPUTER - VEHICLE COMMUNICATIONS should only be used when instructed to do so by another test. Always start at TEST 1A.
5. Turn ignition switch to OFF position before disconnecting or connecting components.
6. Use extreme care when connecting or disconnecting wiring during testing to prevent accidental grounding or shorting.
7. DO NOT use a test light in place of a voltmeter.
8. Always disconnect scan tool after use.
9. Always disconnect scan tool before charging battery.
10. Always perform appropriate verification test after repairs are made.

Note. Before proceeding with diagnosis, certain precautions must be followed. See PRETEST INSPECTION under SELF-DIAGNOSTIC SYSTEM.

Diagnostic test procedures are designed to detect system faults as quickly as possible. Body Diagnostic Trouble Codes (DTCs) are accessed through Data Link Connector (DLC). Chrysler's Diagnostic Readout Box (DRB) scan tool or generic scan tool, is used to access information from DLC.

A 1998 diagnostic program cartridge (if applicable), scan tool, body diagnostics cable, hand-held oil pressure gauge, jumper wires, and digital volt-ohmmeter will be needed for testing. Proceed to TEST 1A in VEHICLE COMMUNICATIONS .

GENERIC SCAN TOOL

Self-diagnostic tests are written specifically for Chrysler's Diagnostic Readout Box (DRB) scan tool. A generic scan tool can be used, but may not be capable of performing all necessary test functions.

DRB SCAN TOOL

Refer to DRB scan tool instructions to retrieve and clear fault messages, and when performing other scan tool function.

DRB scan tool is grounded through DLC connector. Only one volt/ohmmeter test lead is required when instructed by testing to measure voltage or resistance on specified circuit. DRB scan tool volt/ohmmeter mode should only be used when body control computer tests require the use of this option.

CONNECTOR IDENTIFICATION

Note. For terminal identification of body control system connectors, use following illustrations. (Scheme 1)-11. Connector terminal numbers may be molded into connectors. If connector terminal identification differs from that shown in figure, use wire colors to ensure correct circuit is being tested.

CONNECTOR IDENTIFICATION DIRECTORY

Scheme 1

Scheme 2

Scheme 3

Scheme 4

Scheme 5

Scheme 6

Scheme 7

Scheme 8

Scheme 9

Scheme 10

Scheme 11

Note. Body control computer in Ram Van/Wagon is the Central Timer Module (CTM).

SYMPTOM ID TEST 1A - IDENTIFYING VEHICLE EQUIPMENT & SYSTEM PROBLEMS

Note. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS .

Note. Perform a visual inspection before proceeding with this test. Ensure battery is fully charged.

1. Connect scan tool to Data Link Connector (DLC). DLC is a 16-pin connector located under left side of dash, to left of steering wheel. Turn ignition switch to ON position. If scan tool display is not blank, go to next step. If scan tool display is blank, see «VEHICLE COMMUNICATIONS»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer) .
2. Using scan tool, select SYSTEM MONITORS, then CCD BUS TEST. Scan tool will perform a CCD bus test. If scan tool displays BUS OPERATIONAL, go to next step. If scan tool displays any message except BUS OPERATIONAL, see «VEHICLE COMMUNICATIONS»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer) .
3. Using scan tool, select READ DTCs. If any fault messages are present, go to TEST 1B, IDENTIFYING DTCS. If no DTCs are present, go to SYSTEM DIAGNOSTIC TEST DIRECTORY for specific diagnosis. Problems listed are diagnosed using a scan tool. These problems may occur separately or in various combinations. When diagnosing a system with many apparent problems, a sequence of tests may be required. At the beginning of each test a note will indicate which test to perform first. After repairs, ensure problem(s) or failure(s) have been corrected.

SYSTEM DIAGNOSTIC TEST DIRECTORY (1)

SYMPTOM ID TEST 1B - IDENTIFYING DTCS

Note. Perform TEST 1A before proceeding with this test.

If scan tool displays fault messages in TEST 1A, record messages displayed and perform appropriate test(s). See SCAN TOOL MESSAGE DIRECTORY table.

SCAN TOOL MESSAGE DIRECTORY

CHIME TEST 1A - IDENTIFYING CHIME SYSTEM PROBLEMS

Note. Perform SYMPTOM ID TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Using scan tool, select BODY SYSTEM, then BODY COMPUTER, then ACTUATORS. Actuate the chime. If chime sounds, go to next step. Select EXTERNAL CHIME. Actuate the chime. If chime sounds, go to next step. If either chime does not sound, replace Central Timer Module (CTM).
2. Diagnosis of chime system is separated into 6 faults. Identify fault(s) listed in CHIME SYSTEM DIAGNOSTIC TEST DIRECTORY table and perform indicated test(s).

CHIME SYSTEM DIAGNOSTIC TEST DIRECTORY

CHIME TEST 2A - CHIME INOPERATIVE WITH ANY WARNING LIGHT ON

Note. Perform CHIME TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

Disconnect instrument cluster. Turn ignition on. Connect jumper wire between ground and instrument cluster Gray connector terminal No. 4 (Dark Blue/Red wire). If chime remains on, replace instrument cluster. If chime goes off, go to TEST 2B.

CHIME TEST 2B - CHIME INOPERATIVE WITH ANY WARNING LIGHT ON

Note. Perform CHIME TEST 2A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

Ensure ignition is off. With jumper wire still connected. Disconnect Central Timer Module (CTM) Green connector "A". CTM is located on left side of engine cover. Using external ohmmeter, measure resistance between ground and terminal No. 2 (Dark Blue/Red wire) on CTM Green connector "A". If resistance is more than 5 ohms, repair open Dark Blue/Red wire between CTM and instrument cluster. If resistance is 5 ohms or less, replace CTM.

CHIME TEST 3A - CHIME SOUNDS WITH LEFT DOOR OPEN

Note. Perform CHIME TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Ensure all interior and exterior lights are off. Open driver's door and remove key from ignition. If chime sounds, go to next step. If chime does not sound, system is currently functioning correctly.
2. Using scan tool, read key-in ignition chime state. If scan tool displays CHIME STATE: ON, go to TEST 3B. If scan tool does not display CHIME STATE: ON, replace CTM.

CHIME TEST 3B - CHIME SOUNDS WITH LEFT DOOR OPEN

Note. Perform CHIME TEST 3A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Ensure ignition is on. Using scan tool, read driver's door ajar switch status. Open and close driver's door. If scan tool driver's door ajar switch status does not change from OPEN to CLOSED, go to «DOOR AJAR TEST 1A»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer__door-ajar-test-1a-identifying) . If scan tool driver's door ajar switch status changes from OPEN to CLOSED, displays KEY-IN IGNITION CHIME STATE: ON, go to next step.
2. Turn ignition off and remove key. Ensure doors are closed and all interior and exterior lights are off. Disconnect Central Timer Module (CTM) Green connector "A". CTM is located on left side of engine cover. Using external ohmmeter, measure resistance between ground and terminal No. 9 (Light Blue wire) on CTM Green connector "A". If resistance is more than 150 ohms, go to next step. If resistance is 150 ohms or less, repair Light Blue wire between CTM and key-in ignition switch connector for short to ground.
3. Measure resistance between ground and terminal No. 1 (Black/Light Blue wire) on CTM Green connector "A". If resistance is more than 150 ohms, replace CTM. If resistance is 150 ohms or less, repair Black/Light Blue wire between CTM and driver's door light switch for short to ground.

CHIME TEST 4A - CHIME INOPERATIVE WITH EXTERIOR LIGHTS ON

Note. Perform CHIME TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Using scan tool, read driver's door ajar switch status. Open and close driver's door. If scan tool driver's door ajar switch status does not change from OPEN to CLOSED, go to «DOOR AJAR TEST 1A»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer__door-ajar-test-1a-identifying) . If scan tool driver's door ajar switch status changes from OPEN to CLOSED, go to next step.
2. Place key in ignition switch in OFF position. Using scan tool, read key-in ignition chime state. If scan tool does not display KEY-IN IGNITION CHIME STATE: ON, go to TEST 5A. If scan tool displays KEY-IN IGNITION CHIME STATE: ON, go to next step.
3. Turn on headlights. If chime does not sound, repair open driver's door ajar switch sense circuit (Black/Light Blue wire) between CTM Green connector "A" terminal No. 1 and headlight switch. See «WIRING DIAGRAMS»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer) . If chime sounds, system is currently functioning correctly.

CHIME TEST 5A - CHIME INOPERATIVE WITH DRIVER'S DOOR OPEN & KEY IN IGNITION

Note. Perform CHIME TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Turn ignition off and leave key in ignition switch. Open driver's door. If chime does not sound, go to next step. If chime sounds, system is currently functioning correctly.
2. Using scan tool, read driver's door ajar switch status. Open and close driver's door. If scan tool driver's door ajar switch status does not change from OPEN to CLOSED, go to «DOOR AJAR TEST 1A»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer__door-ajar-test-1a-identifying) . If scan tool driver's door ajar switch status changes from OPEN to CLOSED, go to next step.
3. Using scan tool, read key-in ignition chime state. If scan tool does not display KEY-IN IGNITION CHIME STATE: ON, go to next step. If scan tool displays KEY-IN IGNITION CHIME STATE: ON, replace Central Timer Module (CTM). CTM is located on left side of engine cover.
4. Disconnect CTM Green connector "A". Using external ohmmeter, measure resistance between ground and terminal No. 9 (Light Blue wire) on CTM Green connector "A". If resistance is less than 5 ohms, replace CTM. If resistance is 5 ohms or more, go to next step.
5. Connect jumper wire between ground and CTM Green connector "A" terminal No. 9 (Light Blue wire). Disconnect steering column 48-pin connector. The steering column 48-pin connector is located near bottom of steering column. Measure resistance between ground and steering column 48-pin connector terminal B4 (Light Blue wire). If resistance is less than 5 ohms, replace ignition switch. If resistance is 5 ohms or more, repair open Light Blue wire between steering column 48-pin connector and CTM.

CHIME TEST 6A - CHIME INOPERATIVE WITH ANY WARNING LIGHT ON

Note. Perform CHIME TEST 2A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Identify inoperative chime circuit by identifying which light is on. If low fuel chime is working, go to next step. If low fuel chime is not working, go to «INSTRUMENT CLUSTER TEST 4A»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer__instrument-cluster-test-4a-ccd) .
2. If air bag chime is working, go to next step. If air bag chime is not working, go to «INSTRUMENT CLUSTER TEST 4A»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer__instrument-cluster-test-4a-ccd) .
3. If seat belt chime is working, go to next step. If seat belt chime is not working, go to «INSTRUMENT CLUSTER TEST 5A»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer__instrument-cluster-test-5a-hard) .
4. If low washer fluid chime is working, go to next step. If low washer fluid chime is not working, go to «INSTRUMENT CLUSTER TEST 5A»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer__instrument-cluster-test-5a-hard) .
5. If ABS chime is working, go to next step. If ABS chime is not working, go to «INSTRUMENT CLUSTER TEST 5A»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer__instrument-cluster-test-5a-hard) .
6. If check engine chime is working, go to next step. If check engine chime is not working, go to «INSTRUMENT CLUSTER TEST 3D»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer__instrument-cluster-test-3d-oil) .
7. If check engine chime is working with a high temperature condition indicated, go to next step. If check engine chime is not working with a high temperature condition indicated, go to «INSTRUMENT CLUSTER TEST 3E»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer__instrument-cluster-test-3e-temperature) .
8. If transmission temperature chime is working, system is currently functioning correctly. If transmission temperature chime is not working, go to «INSTRUMENT CLUSTER TEST 4A»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer__instrument-cluster-test-4a-ccd) .

CHIME TEST 7A - CHIME REMAINS ON WITH IGNITION ON

Note. Perform CHIME TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Inspect instrument cluster warning lights for condition causing chime or gauge showing a chime condition. If any of stated conditions exist, repair cause and retest system. If none of stated conditions exist, go to next step.
2. Using scan tool, read chime status. If scan tool does not display chime status OFF, go to next step. If scan tool displays chime status OFF, replace CTM. CTM is located on left side of engine cover.
3. Remove instrument cluster. See «INSTRUMENT PANEL - ANALOG»(/dodge/ram-van/iii-1994-2003/remont/gauges-instrument-panels/#instrument-panels-analog) article. If chime stopped, replace instrument cluster. If chime did not stop, go to next step.
4. Disconnect CTM Green connector "A". Using external ohmmeter, measure resistance between ground and terminal No. 2 (wire). If resistance is 1000 ohms or more, system is currently functioning correctly, retest system. If resistance is less than 1000 ohms, repair Dark Blue/Red wire between CTM and instrument cluster for short to ground.

DOOR AJAR TEST 1A - IDENTIFYING DOOR AJAR PROBLEMS

Note. Perform SYMPTOM ID TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Ensure all doors are closed and properly aligned. Using scan tool, enter BODY SYSTEM, then BODY COMPUTER. Select INPUTS/OUTPUTS. Observe door and liftgate ajar switch status.
2. Individually open and close all doors. Scan tool should display status opposite of actual door position.
3. If scan tool displays ajar switch status CLOSED when door is closed, perform appropriate SHORTED test. See DOOR AJAR SYMPTOM DIRECTORY table. If scan tool displays ajar switch status OPEN when door is open, perform appropriate OPEN test. See DOOR AJAR SYMPTOM DIRECTORY table.

DOOR AJAR SYMPTOM DIRECTORY

DOOR AJAR TEST 2A - DRIVER'S DOOR AJAR SHORT CIRCUIT

Note. Perform DOOR AJAR TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Remove driver's door panel. Disconnect driver's door ajar switch. Using scan tool, read left front door ajar switch status. If scan tool displays DRDOOR AJAR SW: CLOSED, go to next step. If scan tool does not display DRDOOR AJAR SW: CLOSED, replace left front door latch assembly.
2. Disconnect Central Timer Module (CTM) 14-pin Green connector "A". CTM is located on left side of engine cover. Using an external ohmmeter, measure resistance between ground and CTM 14-pin Green connector "A" terminal No. 1 (Black/Light Blue wire). If resistance is less than 5 ohms, repair short to ground in Black/Light Blue wire between CTM connector "A" and left front door ajar switch. If resistance is 5 ohms or more, replace CTM.

DOOR AJAR TEST 3A - DRIVER'S DOOR AJAR OPEN CIRCUIT

Note. Perform DOOR AJAR TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Remove driver's door panel. Disconnect driver's door ajar switch and ensure connector is clean and not damaged. Connect a jumper wire between left front door ajar switch connector Black/Light Blue wire and Black wire. Using scan tool, read left front door ajar switch status. If scan tool displays DRDOOR AJAR SW: CLOSED, replace left front door latch assembly. If scan tool does not display DRDOOR AJAR SW: CLOSED, go to next step.
2. Disconnect jumper wire from Black wire. Take jumper wire end removed from Black wire and connect to ground. If scan tool displays DRDOOR AJAR SW: CLOSED, repair open ground circuit (Black wire). If scan tool does not display DRDOOR AJAR SW: CLOSED, go to next step.
3. Leave jumper wire connected. Locate Central Timer Module (CTM). CTM is located on left side of engine cover. Disconnect CTM 14-pin Green connector "A". Using an external ohmmeter, measure resistance between ground and CTM 14-pin Green connector "A" terminal No. 1 (Black/Light Blue wire). If resistance is less than 5 ohms, replace CTM. If resistance is 5 ohms or more, repair open Black/Light Blue wire between CTM connector "A" and left front door ajar switch.

DOOR AJAR TEST 4A - PASSENGER'S DOOR AJAR SHORT CIRCUIT

Note. Perform DOOR AJAR TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Ensure all doors are closed. Open right front door and remove door panel. Disconnect right front door ajar switch. Using scan tool, read right front door ajar switch status. If scan tool displays PASSDOOR AJAR SW: CLOSED, go to next step. If scan tool does not display PASSDOOR AJAR SW: CLOSED, replace right front door latch assembly.
2. Disconnect Central Timer Module (CTM) 14-pin Green connector "A". CTM is located on left side of engine cover. Using an external ohmmeter, measure resistance between ground and CTM 14-pin Green connector "A" terminal No. 5 (Tan/Red wire). If resistance is less than 5 ohms, repair short to ground in Tan/Red wire. If resistance is 5 ohms or more, replace CTM.

DOOR AJAR TEST 5A - PASSENGER'S DOOR AJAR OPEN CIRCUIT

Note. Perform DOOR AJAR TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Remove passenger's door panel. Disconnect right front door ajar switch and ensure connector is clean and not damaged. Connect a jumper wire between right front door ajar switch connector Tan/Red wire and Black wire. Using scan tool, read right front door ajar switch status. If scan tool displays PASSDOOR AJAR SW: CLOSED, replace right front door latch assembly. If scan tool does not display PASSDOOR AJAR SW: CLOSED, go to next step.
2. Disconnect jumper from Black wire. Take jumper wire end removed from Black wire and connect to ground. If scan tool displays PASSDOOR AJAR SWITCH: CLOSED, repair open ground circuit (Black wire). If scan tool does not display PASSDOOR AJAR SW: CLOSED, go to next step.
3. Leave jumper wire connected. Locate Central Timer Module (CTM). CTM is located on left side of engine cover. Disconnect CTM 14-pin Green connector "A". Using an external ohmmeter, measure resistance between ground and CTM 14-pin Green connector "A" terminal No. 5 (Tan/Red wire). If resistance is less than 5 ohms, replace CTM. If resistance is 5 ohms or more, repair open Tan/Red wire between CTM connector "A" and right front door ajar switch.

DOOR AJAR TEST 6A - SHORTED AUXILIARY DOOR AJAR CIRCUIT

Note. Perform DOOR AJAR TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Remove side auxiliary door panel. Disconnect side auxiliary door ajar switch connector. Using scan tool, read auxiliary door ajar switch status. If scan tool displays AUXILIARY DOOR SWITCH: CLOSED, go to next step. If scan tool does not display AUXILIARY DOOR SWITCH: CLOSED, replace side auxiliary door ajar switch.
2. Remove rear auxiliary door panel. Disconnect rear auxiliary door ajar switch connector. Using scan tool, read auxiliary door ajar switch status. If scan tool displays AUXILIARY DOOR SWITCH: CLOSED, go to next step. If scan tool does not display AUXILIARY DOOR SWITCH: CLOSED, replace rear auxiliary door ajar switch.
3. Disconnect Central Timer Module (CTM) 18-pin White connector C2. CTM is located on left side of engine cover. Using an external ohmmeter, measure resistance between ground and CTM 18-pin White connector C2 terminal No. 15 (Tan/Black wire). If resistance is less than 5 ohms, repair short to ground in Tan/Black wire. If resistance is 5 ohms or more, replace CTM.

DOOR AJAR TEST 7A - AUXILIARY DOOR AJAR OPEN CIRCUIT

Note. Perform DOOR AJAR TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Disconnect inoperative auxiliary door ajar switch and ensure connector is clean and not damaged. Connect a jumper wire between ground and auxiliary door ajar switch connector Tan/Black wire. Using scan tool, read auxiliary door ajar switch status. If scan tool displays AUXILIARY DOOR SWITCH: CLOSED, replace auxiliary door ajar switch. If scan tool does not display AUXILIARY DOOR SWITCH: CLOSED, go to next step.
2. Do not remove jumper wire. Disconnect Central Timer Module (CTM) 18-pin White connector C2. CTM is located on left side of engine cover. Using an external ohmmeter, measure resistance between ground and CTM 18-pin White connector C2 terminal No. 15 (Tan/Black wire). If resistance is less than 5 ohms, replace CTM. If resistance is 5 ohms or more, repair open Tan/Black wire.

INSTRUMENT CLUSTER TEST 1A - IDENTIFYING INSTRUMENT CLUSTER PROBLEMS

Note. Perform SYMPTOM ID TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Turn ignition on. Using scan tool, select ELECTRO/MECH CLUSTER (MIC). If scan tool displays NO RESPONSE, go to «VEHICLE COMMUNICATIONS»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer) . If scan tool display is other than described, go to next step.
2. RWD Van instrument clusters do not set DTCs. Diagnostics are symptom based only. Identify problem(s) listed in INSTRUMENT CLUSTER DIAGNOSTIC TEST DIRECTORY table and perform appropriate indicated test(s).

INSTRUMENT CLUSTER DIAGNOSTIC TEST DIRECTORY

INSTRUMENT CLUSTER TEST 2A - ALL GAUGES DO NOT OPERATE

Note. Perform INSTRUMENT CLUSTER TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Remove and inspect fuse No. 11. Fuse No. 11 is located in junction block behind left kick panel. If fuse is okay, go to next step. If fuse is open, go to «VEHICLE COMMUNICATIONS»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer) .
2. Turn ignition off. Remove instrument cluster. See «INSTRUMENT PANEL - ANALOG»(/dodge/ram-van/iii-1994-2003/remont/gauges-instrument-panels/#instrument-panels-analog) article. Turn ignition on. Using external voltmeter, measure voltage between ground and Black instrument cluster connector C1 terminal No. 2 (Dark Blue/White wire). If voltage is 10 volts or less, repair open Dark Blue/White wire. If voltage is more than 10 volts, replace instrument cluster.

INSTRUMENT CLUSTER TEST 3A - ONE GAUGE DOES NOT OPERATE

Note. Perform INSTRUMENT CLUSTER TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Using scan tool, perform instrument cluster self-test, under ACTUATE TESTS. Turn ignition off. Remove instrument cluster. See «INSTRUMENT PANEL - ANALOG»(/dodge/ram-van/iii-1994-2003/remont/gauges-instrument-panels/#instrument-panels-analog) article. If gauge reached proper calibration point, go to next step. If gauge did not reach proper calibration point, replace instrument cluster.
2. Stop instrument cluster self-test. Identify inoperative gauge. If speedometer is not working properly, go to TEST 3B. If speedometer is working properly, go to next step.
3. If oil pressure gauge is not working properly, go to TEST 3C. If oil pressure gauge is working properly, go to next step.
4. If temperature gauge is not working properly, go to TEST 3E. If temperature gauge is working properly, go to next step.
5. If fuel gauge is not working properly, see TESTS W/CODES article in the ENGINE PERFORMANCE Section. If fuel gauge is working properly, system is currently functioning correctly.

INSTRUMENT CLUSTER TEST 3B - SPEEDOMETER DOES NOT OPERATE

Note. Perform INSTRUMENT CLUSTER TEST 3A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Using SCAN TOOL, SELECT BODY--SYSTEM TESTS then PCM MONITOR. If scan tool displays PCM ACTIVE ON THE BUS, go to next step. If scan tool does not display PCM ACTIVE ON THE BUS, go to TEST 3A in BODY CONTROL COMPUTER - VEHICLE COMMUNICATIONS.
2. Raise and support vehicle. Start engine and place gear selector in DRIVE position. Using scan tool, select MIC MONITORS then CCD BUS ENGINE INFO. Read Vehicle Speed Sensor (VSS) signal. If VSS signal on scan tool matches speedometer, see ANTI-LOCK BRAKE SYSTEM article in the BRAKES Section for tooth and tire calibration. If VSS signal on scan tool does not match speedometer, replace instrument cluster circuit board.

INSTRUMENT CLUSTER TEST 3C - OIL PRESSURE GAUGE DOES NOT OPERATE

Note. Perform INSTRUMENT CLUSTER TEST 3A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Turn ignition on. If check gauges light illuminated, go to next step. If check gauges light did not illuminate, go to TEST 3D.
2. Turn ignition off. Check oil level. If oil level is within proper range, go to next step. If oil level is not within proper range, add oil as necessary.
3. Disconnect oil pressure switch connector. Oil pressure switch is located at bottom of distributor. If check gauges light remains illuminated, go to step 6). If check gauges light went out, go to next step.
4. Replace oil pressure switch with a mechanical gauge. Start engine. If oil pressure is 4 psi or more at idle, go to next step. If oil pressure is less than 4 psi at idle, go to article in ENGINE MECHANICAL Section for mechanical repair.
5. Warm engine to normal operating temperature. If oil pressure is 4 psi or more at idle warm, replace oil pressure switch. If oil pressure is less than 4 psi at idle warm, go to article in ENGINE MECHANICAL Section for mechanical repair.
6. Disconnect Powertrain Control Module (PCM) Black connector C2. PCM is located in center of underhood engine compartment. Using external ohmmeter, measure resistance between ground and PCM Black connector C2 terminal No. 23 (Gray wire). If resistance is less than 5 ohms, repair short to ground in Gray wire between PCM and oil pressure switch. If resistance is 5 ohms or more, replace PCM.

INSTRUMENT CLUSTER TEST 3D - OIL PRESSURE GAUGE DOES NOT OPERATE

Note. Perform INSTRUMENT CLUSTER TEST 3A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Disconnect oil pressure switch connector. Oil pressure switch is located at bottom of distributor. Connect jumper wire between oil pressure switch connector terminals. If oil pressure warning light illuminated, replace oil pressure switch. If oil pressure warning light did not illuminate, go to next step.
2. With jumper wire still connected, disconnect Powertrain Control Module (PCM) Black connector C2. PCM is located in center of underhood engine compartment. Using external ohmmeter, measure resistance between ground and PCM Black connector C2 terminal No. 23 (Gray wire). If resistance is less than 5 ohms, replace PCM. If resistance is 5 ohms or more, repair open Gray wire between PCM and oil pressure switch.

INSTRUMENT CLUSTER TEST 3E - TEMPERATURE GAUGE DOES NOT OPERATE

Note. Perform INSTRUMENT CLUSTER TEST 3A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. If cooling system is operating properly, go to next step. If cooling system is not operating properly, see ENGINE COOLING article in ENGINE MECHANICAL Section for mechanical repair.
2. Using scan tool, select BODY--SYSTEM TESTS then PCM MONITOR. If scan tool displays PCM ACTIVE ON THE BUS, go to next step. If scan tool does not display PCM ACTIVE ON THE BUS, go to «TEST 3A»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer__test-3a-no-response-from) under VEHICLE COMMUNICATIONS.
3. Select MODULE ENGINE CONTROLLER. Read PCM DTCs. If scan tool displays ECT SENSOR VOLTAGE TOO HIGH, see TESTS W/CODES article in the ENGINE PERFORMANCE Section. If scan tool does not display ECT SENSOR VOLTAGE TOO HIGH, go to next step.
4. If scan tool displays ECT SENSOR VOLTAGE TOO LOW, see TESTS W/CODES article in the ENGINE PERFORMANCE Section. If scan tool does not display ECT SENSOR VOLTAGE TOO LOW, replace PCM.

INSTRUMENT CLUSTER TEST 4A - CCD WARNING LIGHT PROBLEMS

Note. Perform INSTRUMENT CLUSTER TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Using scan tool, perform instrument cluster self-test, under ACTUATE TESTS. Observe inoperative light during self-test. If inoperative light did not illuminate during self-test, go to next step. If inoperative light illuminated during self-test, verify if light is an input to instrument cluster. See «WIRING DIAGRAMS»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer) . If light is an input to instrument cluster, go to appropriate circuits article. See INSTRUMENT CLUSTER INPUTS table. If light is not an input to instrument cluster, system is currently functioning correctly. INSTRUMENT CLUSTER INPUTS Light Refer To ABS (1) Air Bag (2) Check Engine (3) Check Gauges «INSTRUMENT CLUSTER TEST 1A»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer__instrument-cluster-test-1a-identifying) Cruise Control (4) Overdrive Off (5) Trans Temp (5) VTSS «VTSS TEST 1A»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer__vtss-test-1a-identifying-vehicle) (1) See appropriate ANTI-LOCK BRAKE SYSTEM article. (2) See appropriate AIR BAG RESTRAINT SYSTEM article. (3) See TESTS W/CODES article in the ENGINE PERFORMANCE Section. (4) See «CRUISE CONTROL SYSTEM»(/dodge/ram-van/iii-1994-2003/remont/cruise-control-systems/#cruise-control-systems) article. (5) See ELECTRONIC CONTROLS article in AUTOMATIC TRANSMISSION Section.
2. Gain access to instrument cluster. See «INSTRUMENT PANEL - ANALOG»(/dodge/ram-van/iii-1994-2003/remont/gauges-instrument-panels/#instrument-panels-analog) article. Remove and inspect defective bulb. If bulb is burned out, replace bulb. If bulb is not burned out, replace instrument cluster.

INSTRUMENT CLUSTER TEST 5A - HARD WIRED WARNING LIGHT PROBLEMS

Note. Perform INSTRUMENT CLUSTER TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Remove instrument cluster. See «INSTRUMENT PANEL - ANALOG»(/dodge/ram-van/iii-1994-2003/remont/gauges-instrument-panels/#instrument-panels-analog) article. Remove inoperative bulb. If bulb is burned out, replace bulb. If bulb is not burned out, go to next step.
2. Inspect wiring diagram and evaluate which instrument cluster provides; power or ground for inoperative bulb. See «WIRING DIAGRAMS»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer) . Using external ohmmeter or voltmeter, check appropriate power or ground circuit. If circuit is okay, replace instrument cluster. If power or ground is not available at appropriate circuit, repair open circuit.

INTERIOR LIGHT TEST 1A - IDENTIFYING INTERIOR LIGHTING SYSTEM PROBLEMS

Note. Perform SYMPTOM ID TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

Interior lighting system consists of courtesy lights and illuminated entry and key-in light. Identify problem(s) listed in INTERIOR LIGHT SYSTEM DIAGNOSTIC TEST DIRECTORY table and perform indicated test(s).

INTERIOR LIGHT SYSTEM DIAGNOSTIC TEST DIRECTORY

INTERIOR LIGHT TEST 2A - COURTESY LIGHTS INOPERATIVE FROM ALL DOORS & COURTESY LIGHT SWITCH

Note. Perform INTERIOR LIGHT TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Ensure panel light dimmer switch is not in defeat position. Disconnect middle courtesy light 3-pin connector. Using external voltmeter, measure voltage between ground and middle courtesy light 3-pin connector terminal No. 2 (Black/Pink wire). If voltage is more than 10 volts, repair open Black/Pink wire. If voltage is 10 volts or less, go to next step.
2. Disconnect defeat switch 2-pin connector. Measure voltage between ground and defeat switch 2-pin connector Pink/White wire. If voltage is more than 10 volts, repair open Pink/White wire. If voltage is 10 volts or less, go to next step.
3. Connect jumper wire between defeat switch 2-pin connector terminals. If courtesy lights operate, replace headlight switch. If courtesy lights do not operate, repair open courtesy light driver circuit (Yellow wire) between headlight switch and splice. See «WIRING DIAGRAMS»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer) .

INTERIOR LIGHT TEST 3A - COURTESY LIGHTS INOPERATIVE WITH COURTESY LIGHT SWITCH

Note. Perform INTERIOR LIGHT TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Disconnect headlight switch 1-pin ground connector. Using external ohmmeter, measure resistance between ground and headlight switch 1-pin ground connector Black wire. If resistance is less than 10 ohms, go to next step. If resistance is 10 ohms or more, repair open Black wire between headlight switch and ground.
2. Disconnect headlight switch 9-pin connector. Connect jumper wire between ground and headlight switch 9-pin connector terminal "D" (Yellow wire). If courtesy lights illuminate, replace headlight switch. If courtesy lights do not illuminate, repair open courtesy light driver circuit (Yellow wire) between headlight switch and splice. See «WIRING DIAGRAMS»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer) .

INTERIOR LIGHT TEST 4A - COURTESY LIGHTS INOPERATIVE FROM BOTH FRONT DOORS

Note. Perform INTERIOR LIGHT TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Using scan tool, read left front door ajar switch status with left front door open. If scan tool displays DRDOOR AJAR SW: CLOSED, go to next step. If scan tool does not display DRDOOR AJAR SW: CLOSED, go to «DOOR AJAR TEST 3A»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer__door-ajar-test-3a-drivers) .
2. Disconnect Central Timer Module (CTM) 18-pin White connector C2. CTM is located on left side of engine cover. Connect jumper wire between ground and CTM 18-pin White connector C2 terminal No. 2 (Yellow wire). If courtesy lights illuminate, replace CTM. If courtesy lights do not illuminate, repair open courtesy light driver circuit (Yellow wire) between CTM and splice. See «WIRING DIAGRAMS»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer) .

INTERIOR LIGHT TEST 5A - COURTESY LIGHTS ON CONSTANTLY

Note. Perform INTERIOR LIGHT TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Ensure auxiliary door switches are properly adjusted. Ensure all doors are closed and courtesy light switch is in middle position. Using scan tool, read left front door ajar switch status. If scan tool displays DRDOOR AJAR SW: CLOSED, go to «DOOR AJAR TEST 2A»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer__door-ajar-test-2a-drivers) . If scan tool does not display DRDOOR AJAR CLOSED, go to next step.
2. Read right front door ajar switch status. If scan tool displays PASSDOOR AJAR SW: CLOSED, go to «DOOR AJAR TEST 4A»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer__door-ajar-test-4a-passengers) . If scan tool does not display PASSDOOR AJAR CLOSED, go to next step
3. Read auxiliary door ajar switch status. If scan tool displays AUXILIARY DOOR SWITCH: CLOSED, go to «DOOR AJAR TEST 6A»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer__door-ajar-test-6a-shorted) . If scan tool does not display AUXILIARY DOOR SWITCH: CLOSED, go to next step.
4. Disconnect auxiliary door ajar switches one at a time while monitoring courtesy lights. If courtesy lights turned off after either auxiliary door ajar switch was disconnected, replace defective auxiliary door ajar switch. If courtesy lights remained on after both auxiliary door ajar switch was disconnected, go to next step.
5. Disconnect headlight switch 9-pin connector. If courtesy lights turned off after headlight switch was disconnected, replace defective headlight switch. If courtesy lights remained on after headlight switch was disconnected,go to next step.
6. Disconnect Central Timer Module (CTM) 18-pin White connector C2. CTM is located on left side of engine cover. If courtesy lights turned off after CTM was disconnected, replace defective CTM. If courtesy lights remained on after CTM was disconnected, repair short to ground in courtesy light driver circuit (Yellow wire) between CTM and splice. See «WIRING DIAGRAMS»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer) .

INTERIOR LIGHT TEST 6A - COURTESY LIGHTS INOPERATIVE FROM EITHER AUXILIARY DOOR

Note. Perform INTERIOR LIGHT TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Ensure courtesy light switch is in middle position. Disconnect inoperative auxiliary door ajar switch connector. Connect jumper wire between ground and auxiliary door ajar switch terminal (Yellow wire).
2. If courtesy lights illuminated, replace defective auxiliary door ajar switch. If courtesy lights did not illuminate, repair open courtesy light driver circuit (Yellow wire) between auxiliary door ajar switch and splice. See «WIRING DIAGRAMS»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer) .

POWER DOOR LOCK TEST 1A - IDENTIFYING POWER DOOR LOCK PROBLEMS

Note. Perform SYMPTOM ID TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Using scan tool, read diagnostic trouble codes. If any door lock or unlock code(s) are present, go to TEST 2A for lock code and TEST 3A for unlock code. See POWER DOOR LOCK SYSTEM DIAGNOSTIC TEST DIRECTORY table. If no codes are present, go to next step.
2. If no codes are set, diagnosis is symptom based. See POWER DOOR LOCK SYSTEM DIAGNOSTIC TEST DIRECTORY table.

POWER DOOR LOCK SYSTEM DIAGNOSTIC TEST DIRECTORY

POWER DOOR LOCK TEST 2A - DOOR LOCK SWITCH FAILURE

Note. Perform POWER DOOR LOCK TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Clear trouble codes as needed. Using scan tool, read I/O's door lock switch status. If scan tool does not display PRESSED, go to step 5). If scan tool displays PRESSED, go to next step.
2. Disconnect left door lock switch connector. If scan tool displays PRESSED, go to next step. If scan tool does not display PRESSED, replace left door lock switch.
3. Disconnect right door lock switch connector. If scan tool displays PRESSED, go to next step. If scan tool does not display PRESSED, replace right door lock switch.
4. Locate Central Timer Module (CTM). CTM is located on left side of engine cover. Disconnect CTM 18-pin White connector C2. Using an external voltmeter, measure voltage between ground and CTM 18-pin White connector C2 terminal No. 4 (Orange/Violet wire). If voltage is more than 1.5 volts, repair short to voltage in Orange/Violet wire. If voltage is 1.5 volts or less, replace CTM.
5. Press door lock switch while monitoring scan tool. If scan tool displays PRESSED, system is currently functioning properly. If scan tool does not display PRESSED, go to next step.
6. Gain access to back of lock switch. Using an external voltmeter, measure voltage between ground and lock switch connector terminal No. 3 (Red wire). If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open Red wire between fuse No. 4 and door lock switch.
7. Ensure door lock switch is connected. Measure voltage between ground and lock switch connector terminal No. 1 (Orange/Violet wire). Press door lock switch while monitoring voltmeter. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, replace door lock switch.
8. Locate Central Timer Module (CTM). Disconnect CTM 18-pin White connector C2. CTM is located on left side of engine cover. Measure voltage between ground and CTM 18-pin White connector C2 terminal No. 4 (Orange/Violet wire). Press door lock switch while monitoring voltmeter. If voltage is more than 10 volts, replace CTM. If voltage is 10 volts or less, repair open Orange/Violet wire between CTM and door lock switch.

POWER DOOR LOCK TEST 3A - DOOR UNLOCK SWITCH FAILURE

Note. Perform POWER DOOR LOCK TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Clear trouble codes as needed. Using scan tool, read I/O's door unlock switch status. If scan tool displays PRESSED, go to next step. If scan tool does not display PRESSED, go to step 5).
2. Disconnect left door lock switch connector. If scan tool displays PRESSED, go to next step. If scan tool does not display PRESSED, replace left door lock switch.
3. Disconnect right door lock switch connector. If scan tool displays PRESSED, go to next step. If scan tool does not display PRESSED, replace right door lock switch.
4. Locate Central Timer Module (CTM). CTM is located on left side of engine cover. Disconnect CTM 18-pin White connector C2. Using an external voltmeter, measure voltage between ground and CTM 18-pin White connector C2 terminal No. 13 (Pink/Violet wire). If voltage is more than 1.5 volts, repair short to voltage in Pink/Violet wire. If voltage is 1.5 volts or less, replace CTM.
5. Press door unlock switch while monitoring scan tool. If scan tool displays PRESSED, system is currently functioning properly. If scan tool does not display PRESSED, go to next step.
6. Gain access to back of lock switch. Using an external voltmeter, measure voltage between ground and lock switch connector terminal No. 3 (Red wire). If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open Red wire between fuse No. 4 and door lock switch.
7. Ensure door lock switch is connected. Measure voltage between ground and lock switch connector terminal No. 5 (Pink/Violet wire). Press door lock switch while monitoring voltmeter. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, replace door lock switch.
8. Locate Central Timer Module (CTM). Disconnect CTM 18-pin White connector C2. CTM is located on left side of engine cover. Measure voltage between ground and CTM 18-pin White connector C2 terminal No. 13 (Pink/Violet wire). Press door lock switch while monitoring voltmeter. If voltage is more than 10 volts, replace CTM. If voltage is 10 volts or less, repair open Pink/Violet wire between CTM and door lock switch.

POWER DOOR LOCK TEST 4A - ALL DOORS FAIL TO LOCK & UNLOCK FROM ANY SWITCH

Note. Perform POWER DOOR LOCK TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Ensure windows are down, key is not in ignition and doors are unlocked. Using scan tool, actuate door lock relay. If door locks operate, go to TEST 2A. If door locks do not operate, go to next step.
2. Remove and inspect fuse No. 4 from junction block. Junction block is located behind left kick panel. If fuse is open, go to step 5). If fuse is okay, go to next step.
3. Reinstall fuse. Locate Central Timer Module (CTM). CTM is located on left side of engine cover. Disconnect CTM 14-pin Green connector "A". Using an external voltmeter, measure voltage between ground and CTM 14-pin Green connector "A" terminal No. 14 (Red wire). If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open Red wire between fuse No. 4 and door lock switch.
4. Turn ignition off. Disconnect CTM 18-pin White connector C2. Using external ohmmeter, measure resistance between ground and CTM 18-pin White connector C2 terminal No. 3 (Black wire). If resistance is more than 5 ohms, repair open Black wire between CTM and ground. If resistance is 5 ohms or less, replace CTM.
5. Turn ignition off. Using external ohmmeter, measure resistance between ground and fuse No. 4 (Red wire). If resistance is 5 ohms or more, repair short to ground in Red wire between junction block and battery source. See «WIRING DIAGRAMS»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer) . If resistance is less than 5 ohms, go to next step.
6. Replace fuse No. 4. Press door lock switch and inspect fuse No. 4. If fuse is okay, go to next step. If fuse is blown, go to TEST 4B.
7. Press door unlock switch and inspect fuse No. 4. If fuse is okay, system is currently functioning properly. If fuse is blown, go to TEST 4C.

POWER DOOR LOCK TEST 4B - ALL DOORS FAIL TO LOCK & UNLOCK FROM ANY SWITCH

Note. Perform POWER DOOR LOCK TEST 4A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Locate Central Timer Module (CTM). CTM is located on left side of engine cover. Disconnect CTM 18-pin White connector C2. Using external ohmmeter, measure resistance between ground and CTM 18-pin White connector C2 terminal No. 1 (Orange/Black wire).
2. If resistance is 5 ohms or more, replace fuse No. 4. If resistance is less than 5 ohms, repair short to ground in Orange/Black wire between CTM and door lock motors.

POWER DOOR LOCK TEST 4C - ALL DOORS FAIL TO LOCK & UNLOCK FROM ANY SWITCH

Note. Perform POWER DOOR LOCK TEST 4A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Locate Central Timer Module (CTM). CTM is located on left side of engine cover. Disconnect CTM 18-pin White connector C2. Using external ohmmeter, measure resistance between ground and CTM 18-pin White connector C2 terminal No. 9 (Pink/Black wire).
2. If resistance is 5 ohms or more, replace fuse No. 4. If resistance is less than 5 ohms, repair short to ground in Pink/Black wire between CTM and door lock motors.

POWER DOOR LOCK TEST 5A - ONE DOOR FAILS TO LOCK & UNLOCK FROM ANY SWITCH

Note. Perform POWER DOOR LOCK TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Remove door panel from door failing to lock. Disconnect door lock motor connector. Connect test light between ground and Orange/Black wire of door lock motor connector. If an auxiliary door is being tested, door must be closed before ignition is turned on.
2. Turn ignition on. Using scan tool, actuate door lock relay while monitoring test light. If test light illuminates, go to next step. If test light does not illuminate, repair open Orange/Black wire between CTM and door lock motor.
3. Move test light from Orange/Black wire to Pink/Black wire of door lock motor. Actuate door lock relay while monitoring test light. If test light illuminates, replace door lock motor. If test light does not illuminate, repair open Pink/Black wire between CTM and door lock motor.

POWER DOOR LOCK TEST 6A - ALL DOORS FAIL TO LOCK FROM ANY SWITCH

Note. Perform POWER DOOR LOCK TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Ensure driver's door is closed. Using scan tool, read I/O's driver's door ajar switch status. If scan tool displays DRDOOR AJAR SW: CLOSED, go to «DOOR AJAR TEST 1A»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer__door-ajar-test-1a-identifying) . If scan tool does not display DRDOOR AJAR SW: CLOSED, go to next step.
2. Locate Central Timer Module (CTM). CTM is located on left side of engine cover. Disconnect CTM 18-pin White connector C2. Turn ignition on and check all fuses, replacing as necessary. Using external voltmeter, measure voltage between ground and CTM 18-pin White connector C2 terminal No. 9 (Pink/Black wire). If voltage is more than .1 volt, repair Pink/Black wire for short to voltage between CTM and door lock motor. If voltage is .1 volt or less, go to next step.
3. Turn ignition off. Using external ohmmeter, measure resistance between ground and CTM 18-pin White connector C2 terminal No. 1 (Orange/Black wire). If resistance is 100 ohms or more, repair short to ground in Orange/Black wire between CTM and door lock motors. If resistance is less than 100 ohms, replace CTM.

POWER DOOR LOCK TEST 7A - ALL DOORS FAIL TO UNLOCK FROM ANY SWITCH

Note. Perform POWER DOOR LOCK TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Locate Central Timer Module (CTM). CTM is located on left side of engine cover. Disconnect CTM 18-pin White connector C2. Turn ignition on and check all fuses, replacing as necessary. Using external voltmeter, measure voltage between ground and CTM 18-pin White connector C2 terminal No. 1 (Orange/Black wire). If voltage is more than .1 volt, repair Orange/Black wire for short to voltage between CTM and door lock motor. If voltage is .1 volt or less, go to next step.
2. Turn ignition off. Locate Central Timer Module (CTM). CTM is located on left side of engine cover. Using external ohmmeter, measure resistance between ground and CTM 18-pin White connector C2 terminal No. 9 (Pink/Black wire). If resistance is 100 ohms or more, repair short to ground in Orange/Black wire between CTM and door lock motors. If resistance is less than 100 ohms, replace CTM.

POWER DOOR LOCK TEST 8A - AUXILIARY DOOR FAILS TO LOCK

Note. Perform POWER DOOR LOCK TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Using scan tool, read I/O's driver's auxiliary door ajar switch status. If scan tool displays OPEN, go to TEST 5A. If scan tool does not display OPEN, go to next step.
2. Disconnect side auxiliary door switch connector. If scan tool displays OPEN, replacoes not display OPEN, go to next step.
3. Locate Central Timer Module (CTM). CTM is located on left side of engine cover. Disconnect CTM 18-pin White connector C2. Using external ohmmeter, measure resistance between ground and CTM 18-pin White connector C2 terminal No. 15 (Brown/Tan wire). If resistance is 5 ohms or more, replace CTM. If resistance is less than 5 ohms, repair short to ground in Brown/Tan wire between CTM and rear auxiliary door switch connector.

POWER DOOR LOCK TEST 9A - INOPERATIVE DOOR LOCK INHIBIT CIRCUIT

Note. Perform POWER DOOR LOCK TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Turn ignition on. Using scan tool, select BODY COMPUTER then I/O. Open and close driver's door and read driver's door ajar status. If scan tool driver's door ajar status changes from OPEN to CLOSED, go to next step. If scan tool driver's door ajar status does not change from OPEN to CLOSED, go to «DOOR AJAR TEST 1A»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer__door-ajar-test-1a-identifying) .
2. Ensure key is in ignition. Using scan tool, read key-in ignition chime status. If scan tool does not display KEY-IN IGNITION CHIME STATE: ON, go to next step. If scan tool displays KEY-IN IGNITION CHIME STATE: ON, replace Central Timer Module (CTM). CTM is located on left side of engine cover.
3. Disconnect CTM 14-pin Green connector C1. Using an external ohmmeter, measure resistance between ground and CTM 14-pin Green connector C1 terminal No. 9 (Light Blue wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, replace CTM.
4. Connect jumper wire between ground and CTM 14-pin Green connector C1 terminal No. 9 (Light Blue wire). Disconnect steering column 48-pin connector. The steering column 48-pin connector is located near bottom of steering column. Measure resistance between ground and steering column 48-pin connector terminal B4 (Light Blue wire). If resistance is less than 5 ohms, replace ignition switch. If resistance is 5 ohms or more, repair open Light Blue wire between steering column 48-pin connector and CTM.

POWER DOOR LOCK TEST 10A - AUTOMATIC (WHILE MOVING) DOOR LOCKS

Note. Perform POWER DOOR LOCK TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Using scan tool, read auto door lock status. If scan tool displays AUTO DOOR LOCKS: ENABLED, go to next step. If scan tool does not display AUTO DOOR LOCKS: ENABLED, use scan tool to enable auto door locks.
2. Close all doors. Using scan tool, read driver's door ajar status. If scan tool displays DRDOOR AJAR: CLOSED, go to «DOOR AJAR TEST 2A»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer__door-ajar-test-2a-drivers) . If scan tool does not display DRDOOR AJAR: CLOSED, go to next step.
3. Using scan tool, read passenger's door ajar status. If scan tool displays PASSENGER DOOR AJAR: CLOSED, go to «DOOR AJAR TEST 4A»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer__door-ajar-test-4a-passengers) . If scan tool does not display PASSENGER DOOR AJAR: CLOSED, go to next step.
4. Using scan tool, read auxiliary door(s) ajar status. If scan tool displays AUXILIARY DOOR(S) AJAR: CLOSED, go to «DOOR AJAR TEST 6A»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer__door-ajar-test-6a-shorted) . If scan tool does not display AUXILIARY DOOR(S) AJAR: CLOSED, go to next step.
5. Using scan tool, read engine DTCs. If any Vehicle Speed Sensor (VSS) or Throttle Position (TP) sensor DTCs are present, go to TESTS W/CODES article in the ENGINE PERFORMANCE Section. If no Vehicle Speed Sensor (VSS) or Throttle Position (TP) sensor DTCs are present, go to next step.
6. Turn ignition on with engine off. Using scan tool, select SYSTEM TEST then PCM MONITOR. If scan tool displays, POWERTRAIN CONTROL MODULE: ACTIVE ON BUS, go to next step. If scan tool does not display, POWERTRAIN CONTROL MODULE: ACTIVE ON BUS, go to «VEHICLE COMMUNICATIONS»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer) .
7. Raise and properly support vehicle drive wheels. Close all doors, start engine, apply brakes and put transmission into drive. release brake and raise vehicle speed to 20 MPH. If doors locked automatically when MPH increased to 20 MPH, system is operating properly. If doors did not lock automatically when MPH increased 20 MPH, replace CTM.

POWER DOOR LOCK TEST 11A - REMOTE KEYLESS ENTRY (RKE) PROBLEMS & OPTIONS

Note. Perform POWER DOOR LOCK TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Using a voltmeter test Remote Keyless Entry (RKE) transmitter batteries. If batteries are more than 3.1 volts, go to next step. If batteries are 3.1 volts or less, replace batteries and retest.
2. Secure known good transmitter. Using scan tool, select BODY COMPUTER, MISCELLANEOUS then PROGRAM RKE. Program borrowed transmitter. If system operates properly, replace RKE and reprogram. If system does not operate properly, replace Central Timer Module (CTM). CTM is located on left side of engine cover.

VTSS TEST 1A - IDENTIFYING VEHICLE THEFT SECURITY SYSTEM PROBLEMS

Note. Perform SYMPTOM ID TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Using scan tool select SYSTEM MONITORS, then CCD BUS TEST. Scan tool performs a CCD bus test. If scan tool is blank, displays a CCD bus failure message or displays NO RESPONSE, go to «VEHICLE COMMUNICATIONS»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer) . If scan tool displays BUS OPERATIONAL, go to next step.
2. Select BODY SYSTEM then VTSS and read Central Timer Module (CTM) DTCs. If any VTSS DTCs are displayed, perform appropriate procedure. See VTSS DTC table. If no VTSS DTCs are displayed, go to next step. VTSS DTC DTC Message Perform DOOR DISARM SWITCH FAILURE «VTSS TEST 2A»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer__vtss-test-2a-door-disarm) DOOR LOCK SWITCH FAILURE «POWER DOOR LOCK TEST 2A»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer__power-door-lock-test-2a) DOOR UNLOCK SWITCH FAILURE «POWER DOOR LOCK TEST 3A»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer__power-door-lock-test-3a) EEPROM CHECKSUM FAILURE Replace CTM INTERNAL ROM TEST FAILURE Replace CTM
3. Select THEFT ALARM, VTSS then MONITORS. If scan tool displays, OK TO RUN ENGINE, NOT OK TO ARM VTSS, PCM has not recorded more than 20 starts. Start engine 20 times and retest. If message does not change to OK TO ARM, replace PCM. If message changes to OK TO ARM, go to next step.
4. Press horn button. If horn does not sound, go to «STEERING COLUMN SWITCHES»(/dodge/ram-van/iii-1994-2003/remont/steering-column-switches/#steering-column-switches) article. If horn sounds, go to next step.
5. Using scan tool, select VTSS then ACTUATE TESTS. Actuate horn relay. If horn does not sound, go to TEST 5A. If horn sounds, go to next step.
6. Actuate headlights. If headlights do not flash, go to TEST 6A. If headlights flash, go to next step.
7. Actuate VTSS light. If VTSS light does not flash, go to TEST 7A. If VTSS light flashes, go to next step.
8. Using scan tool, place VTSS in diagnostic mode and follow directions on screen. If TURN KEY TO ACC POSITION is not displayed, go to TEST 8A. If NO RESPONSE after turning key to accessory position or TURN KEY TO ACC POSITION is displayed longer than 15 seconds, go to TEST 9A.
9. Remove key from ignition. Wait 2 seconds after performing each of the following actions. Open, then close each door. Operate power door lock switch to lock, then unlock position.
10. Rotate key in both doors to unlock position. Horn should sound after each action. If horn does not sound, see VTSS SYMPTOM DIRECTORY table. If horn sounds, turn ignition on. If horn does not sound, go to VTSS TEST 10A.

VTSS SYMPTOM DIRECTORY

VTSS TEST 2A - DOOR DISARM SWITCH FAILURE DTC

Note. Perform VTSS TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Using scan tool, read VTSS inputs/outputs information. If scan tool displays door disarm switch state OPEN, go to step 5). If scan tool does not display door disarm switch state OPEN, go to next step.
2. Disconnect left door disarm switch. If scan tool displays door disarm switch state OPEN, replace left door disarm switch. If scan tool does not display door disarm switch state OPEN, go to next step.
3. Disconnect right door disarm switch. If scan tool displays door disarm switch state OPEN, replace left door disarm switch. If scan tool does not display door disarm switch state OPEN, go to next step.
4. Access Central Timer Module (CTM). CTM is located on left side of engine cover. Disconnect CTM White 18-pin connector C2. Using an external ohmmeter, measure resistance between ground and CTM White 18-pin connector C2 terminal No. 10 (Black/Orange wire). If resistance is less than 1000 ohms, repair short to ground in Black/Orange wire. If resistance is 1000 ohms or more, replace CTM.
5. Using door key, turn several times between lock and unlock, returning key to neutral position. If key moves freely in both directions, go to next step. If key does not move freely in both directions, repair or replace lock assembly.
6. If scan tool door disarm switch state changes freely from OPEN to CLOSED, system is currently functioning properly at this time. If scan tool door disarm switch state does not change freely from OPEN to CLOSED, replace door disarm switch.

VTSS TEST 3A - LEFT DISARM SWITCH OPEN

Note. Perform VTSS TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Using scan tool, monitor door disarm switch state. Disconnect left door disarm switch. Connect jumper wire between left door disarm switch connector terminals. If scan tool displays door disarm switch state CLOSED, replace left door disarm switch. If scan tool does not display door disarm switch state CLOSED, go to next step.
2. Disconnect jumper wire. Connect jumper wire between ground and left door disarm switch connector Black/Orange wire. If scan tool displays door disarm switch state CLOSED, go to next step. If scan tool does not display door disarm switch state CLOSED, repair open left door disarm switch ground circuit (Black wire).
3. Access Central Timer Module (CTM). CTM is located on left side of engine cover. Disconnect CTM White 18-pin connector C2. Using an external ohmmeter, measure resistance between ground and CTM White 18-pin connector C2 terminal No. 10 (Black/Orange wire). If resistance is less than 5 ohms, replace CTM. If resistance is 5 ohms or more, repair open Black/Orange wire between CTM and door disarm switch.

VTSS TEST 4A - RIGHT DISARM SWITCH OPEN

Note. Perform VTSS TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Using scan tool, monitor door disarm switch state. Disconnect right door disarm switch. Connect jumper wire between right door disarm switch connector terminals. If scan tool displays door disarm switch state CLOSED, replace right door disarm switch. If scan tool does not display door disarm switch state CLOSED, go to next step.
2. Disconnect jumper wire. Connect jumper wire between ground and right door disarm switch connector Black/Orange wire. If scan tool displays door disarm switch state CLOSED, go to next step. If scan tool does not display door disarm switch state CLOSED, repair open right door disarm switch ground circuit (Black wire).
3. Access Central Timer Module (CTM). CTM is located on left side of engine cover. Disconnect CTM White 18-pin connector C2. Using an external ohmmeter, measure resistance between ground and CTM White 18-pin connector C2 terminal No. 10 (Black/Orange wire). If resistance is less than 5 ohms, replace CTM. If resistance is 5 ohms or more, repair open Black/Orange wire between CTM and door disarm switch.

VTSS TEST 5A - HORN INOPERATIVE IN THEFT MODE

Note. Perform VTSS TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

Locate Central Timer Module (CTM). CTM is located on left side of engine cover. Disconnect CTM White 18-pin connector C2. Connect jumper wire to CTM White 18-pin connector C2 terminal No. 18 (Black/Red wire) and momentarily touch ground. If horn sounds, replace CTM. If horn does not sound, repair open in Black/Red wire between CTM and horn relay.

VTSS TEST 6A - HEADLIGHTS INOPERATIVE IN THEFT MODE

Note. Perform VTSS TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Remove headlight relay. Headlight relay is taped into harness behind headlight switch. Using an external voltmeter, measure voltage between ground and headlight relay connector No. 1 and No. 5 (Red/White wires). If voltage is more than 10 volts at both terminals, go to next step. If voltage is 10 volts or less at either terminal, repair open in appropriate Red/White wire between fuse No. 8 30-amp and headlight relay.
2. Measure voltage between ground and headlight relay connector No. 3 (Violet/White wire). Turn low beam headlights on. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open Violet/White wire between splice and headlight relay. See «WIRING DIAGRAMS»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer) .
3. Connect a test light between battery source and headlight relay connector terminal No. 1 (Red/White wire) and No. 2 (Red wire). Using scan tool, select THEFT ALARM, VTSS, ACTUATOR TESTS then HEADLAMP RELAY. Actuate headlight relay. If test light illuminates, replace headlight relay. If test light does not illuminate, go to next step.
4. With test light still connected. Locate Central Timer Module (CTM). CTM is located on left side of engine cover. Disconnect CTM White 18-pin connector C2. Connect a jumper wire between ground and CTM White 18-pin connector C2 terminal No. 6 (Red wire). If test light illuminates, replace CTM. If test light does not illuminate, repair open in Red wire between CTM and headlight relay.

VTSS TEST 7A - VEHICLE THEFT SECURITY LIGHT INOPERATIVE

Note. Perform VTSS TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Using scan tool, actuate VTSS indicator light. If VTSS indicator light is not illuminated, see «INSTRUMENT PANEL - ANALOG»(/dodge/ram-van/iii-1994-2003/remont/gauges-instrument-panels/#instrument-panels-analog) article. If VTSS indicator light is illuminated, go to next step.
2. Locate Central Timer Module (CTM). CTM is located on left side of engine cover. Disconnect CTM White 18-pin connector C2. Connect a jumper wire between ground and CTM White 18-pin connector C2 terminal No. 8 (Yellow/Orange wire). If VTSS indicator light is not illuminated, repair open in Yellow/Orange wire between CTM and VTSS indicator light. If VTSS indicator light is illuminated, replace CTM.

VTSS TEST 8A - LOSS OF IGNITION RUN TO CTM

Note. Perform VTSS TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Inspect junction block fuse No. 17. Junction block is located behind left kick panel. If fuse is okay, go to step 3). If fuse is blown, go to next step.
2. Using an external ohmmeter, measure resistance between ground and fuse No. 17 White wire terminal. If resistance is less than 5 ohms, repair White wire between junction block and CTM for short to ground and replace fuse No. 17. If resistance is 5 ohms or more, replace fuse No. 17.
3. Locate Central Timer Module (CTM). CTM is located on left side of engine cover. Disconnect CTM 14-pin Green connector C1. Turn ignition on. Using an external voltmeter, measure voltage between ground and CTM 14-pin Green connector C1 terminal No. 8 (Yellow/Red wire). If voltage is more than 10 volts, replace CTM. If voltage is 10 volts or less, repair open Yellow/Red wire between CTM and fuse No. 16 in junction block.

VTSS TEST 9A - LOSS OF IGNITION RUN/ACC TO CTM

Note. Perform VTSS TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Inspect junction block fuse No. 16. Junction block is located behind left kick panel. If fuse is okay, go to step 3). If fuse is blown, go to next step.
2. Using an external ohmmeter, measure resistance between ground and fuse No. 16 Yellow/Red wire terminal. If resistance is less than 5 ohms, repair Yellow/Red wire between junction block and CTM for short to ground and replace fuse No. 16. If resistance is 5 ohms or more, replace fuse No. 16.
3. Locate Central Timer Module (CTM). CTM is located on left side of engine cover. Disconnect CTM 18-pin White connector C2. Turn ignition on. Using an external voltmeter, measure voltage between ground and CTM 18-pin White connector C2 terminal No. 5 (White wire). If voltage is more than 10 volts, replace CTM. If voltage is 10 volts or less, repair open White wire between CTM and fuse No. 17 in junction block.

WINDSHIELD WIPER TEST 1A - IDENTIFYING WINDSHIELD WIPER SYSTEM PROBLEMS

Note. Perform SYMPTOM ID TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS .

Using scan tool, read DTCs. If wiper park switch failure DTC is displayed, go to TEST 2A. If wiper park switch failure DTC is not displayed, see WINDSHIELD WIPER SYSTEM DIAGNOSTIC TEST DIRECTORY table.

Note. Central Timer Module (CTM) is used for intermittent and speed sensitive feature only. If low or high speed problems exist, see WIPER/WASHER SYSTEM article.

WINDSHIELD WIPER SYSTEM DIAGNOSTIC TEST DIRECTORY

WINDSHIELD WIPER TEST 2A - WIPER PARK SWITCH FAILURE

Note. Perform WINDSHIELD WIPER TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

Note. It takes 8 seconds for wiper park switch failure DTC to set.

1. Using scan tool, clear DTCs. Operate wipers in all switch positions including off. Reread DTCs. If WIPER PARK SWITCH FAILURE is displayed, go to next step. If WIPER PARK SWITCH FAILURE is not displayed, system is currently functioning properly.
2. If wipers worked properly in all positions, replace CTM. If wipers did not work properly in all positions, go to next step.
3. If intermittent wipers work erratic or wipers stop in up position, go to step 5). If intermittent wipers do not work erratic or wipers do not stop in up position, go to next step.
4. If wipers do not park in low and hi positions, go to TEST 2B. If wipers park in low and hi positions, replace CTM.
5. Using an external voltmeter, measure voltage between ground and backprobe of steering column 48-pin connector terminal A15 (White/Brown wire). The steering column 48-pin connector is located near bottom of steering column. Monitor voltmeter while turning wiper switch to each intermittent position. If voltage is more than 2 volts in each position, go to next step. If voltage is 2 volts or less in each position, replace wiper switch.
6. Locate Central Timer Module (CTM). CTM is located on left side of engine cover. Measure voltage between ground and backprobe of CTM 14-pin Green connector C1 terminal No. 12 (White/Brown wire). If voltage is more than 2 volts in each position, replace CTM. If voltage is 2 volts or less in each position, repair open White/Brown wire between CTM and steering column 48-pin connector.

WINDSHIELD WIPER TEST 2B - WIPER PARK SWITCH FAILURE

Note. Perform WINDSHIELD WIPER TEST 2A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Place wipers in up position with wiper switch off. Gain access to wiper relay. Wiper relay is located behind glove box. Do not remove relay.
2. Connect jumper wire between ground and backprobe of wiper relay terminal No. 3 (Black/Tan wire). If wipers moved to park position, replace wiper relay. If wipers did not move to park position, repair open Black/Tan wire between wiper relay and multi-function switch.

WINDSHIELD WIPER TEST 3A - WIPERS NOT WORKING IN INTERMITTENT MODE

Note. Perform WINDSHIELD WIPER TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. If wipers run constantly in intermittent mode, go to step 4). If wipers do not run constantly in intermittent mode, go to next step.
2. Gain access to steering column 48-pin connector. The steering column 48-pin connector is located near bottom of steering column. Do not disconnect. Using an external voltmeter, measure voltage between ground and backprobe of steering column 48-pin connector terminal A15 (White/Brown wire). monitor voltmeter while turning wipers to each intermittent speed. If voltage is more than 2 volts in each position, go to next step. If voltage is 2 volts or less in each position, replace wiper switch.
3. Locate Central Timer Module (CTM). CTM is located on left side of engine cover. Measure voltage between ground and backprobe of CTM 14-pin Green connector C1 terminal No. 12 (White/Brown wire). If voltage is more than 2 volts in each position, replace CTM. If voltage is 2 volts or less in each position, repair open White/Brown wire between CTM and steering column 48-pin connector.
4. Gain access to steering column 48-pin connector. The steering column 48-pin connector is located near bottom of steering column. Do not disconnect. Using an external voltmeter, measure voltage between ground and backprobe of steering column 48-pin connector terminal A14 (Violet wire). Turn wiper switch to intermittent position. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, replace wiper switch.
5. Locate Central Timer Module (CTM). CTM is located on left side of engine cover. Measure voltage between ground and backprobe of CTM 14-pin Green connector C1 terminal No. 3 (Violet wire). Turn wiper switch to intermittent position. If voltage is more than 10 volts, replace CTM. If voltage is 10 volts or less, repair open Violet wire between CTM and steering column 48-pin connector.

WINDSHIELD WIPER TEST 4A - WIPER SPEED SENSITIVE FEATURE INOPERATIVE

Note. Perform WINDSHIELD WIPER TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Raise and support vehicle. Turn wipers on to lowest intermittent position. Time interval between wipes. Spin rear wheels to more than 15 MPH. If interval between wipes decreased, system is currently functioning properly. If interval between wipes did not decrease, go to next step.
2. Using scan tool, access wiper system monitor. If vehicle speed signal on scan tool matches speedometer, replace CTM. If vehicle speed signal on scan tool does not match speedometer, go to «INSTRUMENT CLUSTER TEST 3A»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer__instrument-cluster-test-3a-one) .

WINDSHIELD WIPER TEST 5A - WIPER INOPERATIVE AFTER WASHER USED

Note. Perform WINDSHIELD WIPER TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Turn ignition on. If washer system works, go to next step. If washer system does not work, see «WIPER/WASHER SYSTEM»(/dodge/ram-van/iii-1994-2003/remont/wiperwasher-systems/#wiper-system-washer-system) article.
2. If wipers function properly, go to next step. If wipers do not function properly, go to TEST 1A.
3. Using scan tool, select WIPER MONITORS. Observe washer switch status. If washer switch status changes from OFF to ON, replace CTM. If washer switch status changes from OFF to ON, repair open Brown wire between CTM 14-pin Green connector C1 terminal No. 10 and multifunction switch.

TEST 1A - IDENTIFYING VEHICLE COMMUNICATION PROBLEMS

Connect scan tool to Data Link Connector (DLC) to retrieve messages. If scan tool message is blank, see NO RESPONSE DIAGNOSIS table and proceed to appropriate test number. Disconnect scan tool. Ensure ground circuit has continuity at DLC terminal No. 4. Ensure 12 volts exists at DLC terminal No. 16. Try another scan tool and/or cable. See BUS FAULT MESSAGES table and proceed to appropriate test number.

BUS FAULT MESSAGES

NO RESPONSE DIAGNOSIS

TEST 2A - NO RESPONSE FROM AIR BAG CONTROL MODULE

Note. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Remove and inspect fuse No. 19 from junction block. Junction block is behind left kick panel. If fuse is open, go to «TEST 2B»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer__test-2b-no-response-from) . If fuse is okay, go to next step.
2. Using external voltmeter, measure voltage between ground and voltage input side of fuse No. 19 socket (Dark Blue wire). If voltage is 10 volts or less, repair open ignition switch output circuit (Dark Blue wire). If voltage is more than 10 volts, go to next step.
3. Turn ignition off and wait 2 minutes. Install fuse No. 19. Disconnect Air Bag Control Module (ACM) connector. ACM is located under driver's seat. Turn ignition on.
4. Using external voltmeter, measure voltage between ground and terminal No. 14 (Light Green/Yellow wire) on ACM connector. If voltage is 10 volts or less, repair open Light Green/Yellow wire. If voltage is more than 10 volts, go to next step.
5. Turn ignition off. Using external ohmmeter, measure resistance between ground and terminal No. 4 (Black wire) on ACM connector. If resistance is 5 ohms or greater, repair open Black wire. If resistance is less than 5 ohms, go to next step.
6. Turn ignition on. Using external voltmeter, measure voltage between ground and terminal No. 21 (Violet/Brown wire) on ACM connector. If voltage is not 1.8-2.8 volts, repair open Violet/Brown wire. If voltage is 1.8-2.8 volts, go to next step.
7. Using external voltmeter, measure voltage between ground and terminal No. 22 (White/Black wire) on ACM connector. If voltage is not 1.8-2.8 volts, repair open White/Black wire. If voltage is 1.8-2.8 volts, see AIR BAG RESTRAINT SYSTEM article.

TEST 2B - NO RESPONSE FROM AIR BAG CONTROL MODULE

Note. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Turn ignition on. Using external voltmeter, measure voltage between ground and fused ignition switch output run/start terminal (Dark Blue wire) on fuse No. 19 socket. If voltage is 10 volts or less, repair open Dark Blue wire. If voltage is more than 10 volts, go to next step.
2. Turn ignition off and wait 2 minutes. Using external ohmmeter, measure resistance between ground and fused ignition switch output run/start terminal (Light Green/Yellow wire) on fuse No. 19 socket. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or greater, go to step 5).
3. Disconnect Air Bag Control Module (ACM) connector. ACM is located under front of center console. Turn ignition on.
4. Measure resistance between ground and fused ignition switch output run/start terminal (Light Green/Yellow wire) on fuse No. 19 socket. If resistance is less than 5 ohms, repair Light Green/Yellow wire for short to ground. Replace fuse No. 19. If resistance is 5 ohms or greater, replace fuse No. 19. Go to AIR BAG RESTRAINT SYSTEM article for further testing.
5. Turn ignition off and wait 2 minutes. Disconnect Air Bag Control Module (ACM) connector. ACM is located under driver's seat. Using external ohmmeter, measure resistance between terminal No. 14 (Light Green/Yellow wire) on ACM connector and fused ignition switch output run/start terminal (Light Green/Yellow wire) on fuse No. 19 socket.
6. If resistance is less than 5 ohms, reconnect ACM connector. Turn ignition on. Replace fuse No. 19 in junction block. Go to AIR BAG RESTRAINT SYSTEM article for further testing. If resistance is 5 ohms or greater, repair open Light Green/Yellow wire. Replace fuse No. 19.

TEST 3A - NO RESPONSE FROM POWERTRAIN CONTROL MODULE (PCM)

Note. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. If engine does not run, see «BASIC TESTING - 3.9L»(/dodge/ram-van/iii-1994-2003/remont/testing-diagnostics/#engine-controls-basic-engine-testing-39l) article or see «BASIC TESTING - 5.2L»(/dodge/ram-van/iii-1994-2003/remont/testing-diagnostics/#engine-controls-basic-engine-testing-52l) article in the ENGINE PERFORMANCE Section. If engine runs, turn ignition off. Disconnect Powertrain Control Module (PCM). PCM is located in center of underhood engine compartment. Connect jumper wire between ground and PCM Gray connector C3 terminal No. 30 (Violet/Brown wire) on PCM connector. Turn ignition on.
2. Using scan tool, perform CCD BUS test. If scan tool does not display SHORT TO GROUND, repair open Violet/Brown wire. If scan tool displays SHORT TO GROUND, go to next step.
3. Move jumper wire to PCM Gray connector C3 terminal No. 28 (White/Black wire) on PCM connector. Perform CCD BUS test. If scan tool does not display SHORT TO GROUND, repair open White/Black wire. If scan tool displays SHORT TO GROUND, replace PCM.

TEST 4A - BUS SHORT TO BATTERY

Note. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Turn ignition off. Disconnect Powertrain Control Module (PCM). PCM is located in center of underhood engine compartment. Turn ignition on. If scan tool does not display BUS SHORT TO BATTERY, go to «TEST 4B»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer__test-4b-bus-short-to) . If scan tool displays BUS SHORT TO BATTERY, go to next step.
2. Turn ignition off. Disconnect instrument cluster. Turn ignition on. If scan tool does not display BUS SHORT TO BATTERY, go to «TEST 4C»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer__test-4c-bus-short-to) . If scan tool displays BUS SHORT TO BATTERY, go to next step.
3. Turn ignition off and wait 2 minutes. Disconnect Air Bag Control Module (ACM). ACM is located under driver's seat. Turn ignition on. If scan tool does not display BUS SHORT TO BATTERY, go to TEST 18A in AIR BAG RESTRAINT SYSTEM article for further testing. If scan tool displays BUS SHORT TO BATTERY, go to next step.
4. Turn ignition off. Disconnect Central Timer Module (CTM). CTM is located on left side of engine cover. Turn ignition on. If scan tool does not display BUS SHORT TO BATTERY, go to «TEST 4D»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer__test-4d-bus-short-to) . If scan tool displays BUS SHORT TO BATTERY, go to next step.
5. Turn ignition off. Disconnect anti-lock brake controller module. Controller module is mounted to top of ABS hydraulic unit. Turn ignition on. If scan tool does not display BUS SHORT TO BATTERY, replace anti-lock brake controller module. If scan tool displays BUS SHORT TO BATTERY, go to next step.
6. Disconnect scan tool from DLC. Using external voltmeter, measure voltage between ground and terminal No. 3 (Violet/Brown wire) on DLC connector. If voltage is more than .2 volt, repair Violet/Brown wire for short to voltage. If voltage is .2 volt or less, go to next step.
7. Measure voltage between ground and terminal No. 11 (White/Black wire) on DLC connector. If voltage is more than .2 volt, repair White/Black wire for short to voltage. If voltage is less than .2 volt, replace scan tool cable or scan tool as necessary.

TEST 4B - BUS SHORT TO BATTERY

Note. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Turn ignition off. Using external ohmmeter, measure resistance between ground and PCM Black connector C1 terminal No. 31 (Black/Tan wire). PCM is located in center of underhood engine compartment. If resistance is less than 10 ohms, go to next step. If resistance is 10 ohms or greater, repair open Black/Tan wire.
2. Measure resistance between ground and PCM Black connector C1 terminal No. 32 (Black/Tan wire). If resistance is less than 5 ohms, replace PCM. If resistance is 5 ohms or greater, repair open Black/Tan wire.

TEST 4C - BUS SHORT TO BATTERY

Note. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Turn ignition off. Using external ohmmeter, measure resistance between ground and instrument cluster Black connector C1 terminal No. 4 (Black/Dark Green wire). If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or greater, repair open Black/Dark Green wire.
2. Measure resistance between ground and instrument cluster Gray connector C2 terminal No. 7 (Black wire). If resistance is less than 5 ohms, replace instrument cluster. If resistance is 5 ohms or greater, repair open Black wire.

TEST 4D - BUS SHORT TO BATTERY

Note. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Turn ignition off. Using external ohmmeter, measure resistance between ground and CTM 14-pin Green connector C1 terminal No. 6 (Black/Tan wire). If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or greater, repair open Black/Tan wire.
2. Measure resistance between ground and CTM 18-pin White connector C2 terminal No. 3 (Black wire). If resistance is less than 5 ohms, replace CTM. If resistance is 5 ohms or greater, repair open Black wire.

TEST 5A - BUS SHORT TO 5 VOLTS

Note. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Turn ignition off. Disconnect Powertrain Control Module (PCM). PCM is located in center of underhood engine compartment. Turn ignition on. If scan tool does not display BUS SHORT TO 5 VOLTS, go to «TEST 5B»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer__test-5b-bus-short-to) . If scan tool displays BUS SHORT TO 5 VOLTS, go to next step.
2. Turn ignition off. Disconnect anti-lock brake controller module. Controller module is mounted to top of ABS hydraulic unit. Turn ignition on. If scan tool does not display BUS SHORT TO 5 VOLTS, replace anti-lock brake controller module. If scan tool displays BUS SHORT TO 5 VOLTS, go to next step.
3. Turn ignition off. Disconnect instrument cluster. Turn ignition on. If scan tool does not display BUS SHORT TO 5 VOLTS, replace instrument cluster circuit board. If scan tool displays BUS SHORT TO 5 VOLTS, go to next step.
4. Turn ignition off and wait 2 minutes. Disconnect Air Bag Control Module (ACM). ACM is located under front of center console. Turn ignition on. If scan tool does not display BUS SHORT TO 5 VOLTS, go to TEST 18A in AIR BAG RESTRAINT SYSTEM article for further testing. If scan tool displays BUS SHORT TO 5 VOLTS, go to next step.
5. Turn ignition off. Disconnect Central Timer Module (CTM). CTM is located on left side of engine cover. Turn ignition on. If scan tool does not display BUS SHORT TO 5 VOLTS, replace CTM. If scan tool displays BUS SHORT TO 5 VOLTS, go to next step.
6. Disconnect scan tool from DLC. Using external voltmeter, measure voltage between ground and terminal No. 3 (Violet/Brown wire) on DLC connector. If voltage is more than 4 volts, repair Violet/Brown wire for short to 5 volts. If voltage is 4 volts or less, go to next step.
7. Measure voltage between ground and terminal No. 11 (White/Black wire) on DLC connector. If voltage is more than 4 volts, repair White/Black wire for short to 5 volts. If voltage is less than 4 volts, replace scan tool cable or scan tool as necessary.

TEST 5B - BUS SHORT TO 5 VOLTS

Note. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Turn ignition off. Using external ohmmeter, measure resistance between PCM Gray connector C3 terminal No. 30 (Violet/Brown wire) on and PCM Black connector C1 terminal No. 17 (Orange wire). PCM is located in center of underhood engine compartment. If resistance is less than 800 ohms, repair short to 5 volts in Violet/Brown wire. If resistance is 800 ohms or greater, go to next step.
2. Measure resistance between PCM Gray connector C3 terminal No. 30 (Violet/Brown wire) PCM White connector C2 terminal No. 31 (Violet/White wire). If resistance is less than 800 ohms, repair short to 5 volts in Violet/Brown wire. If resistance is 800 ohms or greater, go to next step.
3. Measure resistance between PCM Gray connector C3 terminal No. 28 (White/Black wire) on and PCM Black connector C1 terminal No. 17 (Orange wire). PCM is located in center of underhood engine compartment. If resistance is less than 800 ohms, repair short to 5 volts in White/Black wire. If resistance is 800 ohms or greater, go to next step.
4. Measure resistance between PCM Gray connector C3 terminal No. 28 (White/Black wire) PCM White connector C2 terminal No. 31 (Violet/White wire). If resistance is less than 800 ohms, repair short to 5 volts in White/Black wire. If resistance is 800 ohms or greater, replace PCM.

TEST 6A - BUS SHORT TO GROUND

Note. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Connect backprobe jumper between DLC connector terminal No. 4 and No. 5. If scan tool does not display BUS SHORT TO GROUND, repair open ground wire between DLC terminal No. 5 and ground. If scan tool displays BUS SHORT TO GROUND, go to next step.
2. Turn ignition off. Disconnect Powertrain Control Module (PCM). PCM is located in center of underhood engine compartment. Turn ignition on. If scan tool does not display BUS SHORT TO GROUND, replace PCM. If scan tool displays BUS SHORT TO GROUND, go to next step.
3. Turn ignition off. Disconnect anti-lock brake controller module. Controller module is mounted to top of ABS hydraulic unit. Turn ignition on. If scan tool does not display BUS SHORT TO GROUND, replace anti-lock brake controller module. If scan tool displays BUS SHORT TO GROUND, go to next step.
4. Turn ignition off. Disconnect instrument cluster. Turn ignition on. If scan tool does not display BUS SHORT TO GROUND, replace instrument cluster circuit board. If scan tool displays BUS SHORT TO GROUND, go to next step.
5. Turn ignition off and wait 2 minutes. Disconnect Air Bag Control Module (ACM). ACM is located under front of center console. Turn ignition on. If scan tool does not display BUS SHORT TO GROUND, go to TEST 1 in AIR BAG RESTRAINT SYSTEM article for further testing. If scan tool displays BUS SHORT TO GROUND, go to next step.
6. Turn ignition off. Disconnect Central Timer Module (CTM). CTM is located on left side of engine cover. Turn ignition on. If scan tool does not display BUS SHORT TO GROUND, replace CTM. If scan tool displays BUS SHORT TO GROUND, go to next step.
7. Disconnect scan tool from DLC. Using external ohmmeter, measure resistance between ground and terminal No. 3 (Violet/Brown wire) on DLC connector. If resistance is less than 700 ohms, repair Violet/Brown wire for short to ground. If resistance is 700 ohms or greater, go to next step.
8. Measure resistance between ground and terminal No. 11 (White/Black wire) on DLC connector. If resistance is less than 700 ohms, repair White/Dark Green wire for short to ground. If resistance is 700 ohms or greater, replace scan tool cable or scan tool as necessary.

TEST 7A - BUS (+) & BUS (-) SHORTED TOGETHER

Note. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Turn ignition off. Disconnect Powertrain Control Module (PCM). PCM is located in center of underhood engine compartment. Turn ignition on. If scan tool does not display BUS (+) & BUS (-) SHORTED TOGETHER, replace PCM. If scan tool displays BUS (+) & BUS (-) SHORTED TOGETHER, go to next step.
2. Turn ignition off. Disconnect anti-lock brake controller module. Controller is mounted to top of ABS hydraulic unit. Turn ignition on. If scan tool does not display BUS (+) & BUS (-) SHORTED TOGETHER, replace anti-lock brake controller module. If scan tool displays BUS (+) & BUS (-) SHORTED TOGETHER, go to next step.
3. Turn ignition off. Disconnect instrument cluster. Turn ignition on. If scan tool does not display BUS (+) & BUS (-) SHORTED TOGETHER, replace instrument cluster circuit board. If scan tool displays BUS (+) & BUS (-) SHORTED TOGETHER, go to next step.
4. Turn ignition off and wait 2 minutes. Disconnect Air Bag Control Module (ACM). ACM is located under front of center console. Turn ignition on. If scan tool does not display BUS (+) & BUS (-) SHORTED TOGETHER, go to TEST 18A in AIR BAG RESTRAINT SYSTEM article for further testing. If scan tool displays BUS (+) & BUS (-) SHORTED TOGETHER, go to next step.
5. Turn ignition off. Disconnect Central Timer Module (CTM). CTM is behind right corner of dash, behind glove box. Turn ignition on. If scan tool does not display BUS (+) & BUS (-) SHORTED TOGETHER, replace CTM. If scan tool displays BUS (+) & BUS (-) SHORTED TOGETHER, go to next step.
6. Disconnect scan tool from DLC. Using external ohmmeter, measure resistance between terminals No. 3 (Violet/Brown wire) and No. 11 (White/Black wire) on DLC connector. If resistance is less than 5 ohms, repair short between Violet/Brown wire and White/Dark Green wire. If resistance is 5 ohms or greater, replace scan tool cable or scan tool as necessary.

TEST 8A - NO TERMINATION

Note. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Disconnect Powertrain Control Module (PCM) connectors. PCM is located in center of underhood engine compartment. Connect jumper wire between ground and PCM Gray connector C3 terminal No. 30 (Violet/Brown wire). Using scan tool, select SYSTEM MONITORS. Perform CCD BUS test. If scan tool does not display BUS (+) SHORT TO GROUND, repair open Violet/Brown wire. If scan tool displays BUS (+) SHORT TO GROUND, go to next step. NOTE: For this scan tool message to appear, both instrument cluster and PCM terminators would be open.
2. Move jumper wire from terminal No. 30 to PCM Gray connector C3 terminal No. 28 (White/Black wire). Perform CCD BUS test. If scan tool does not display BUS (-) SHORT TO GROUND, repair open White/Black wire. If scan tool displays BUS (-) SHORT TO GROUND, replace PCM and instrument cluster.

TEST 9A - BUS BIAS LEVEL TOO LOW OR TOO HIGH

Note. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Disconnect scan tool. Using an external voltmeter, measure voltage between ground and terminal No. 3 (Violet/Brown wire) on DLC connector. If voltage is not 1.8-2.8 volts, go to step 3). If voltage is 1.8-2.8 volts, go to next step.
2. Measure voltage between ground and terminal No. 11 (White/Black wire) on DLC connector. If voltage is not 1.8-2.8 volts, go to next step. If voltage is 1.8-2.8 volts, replace scan tool cable or scan tool.
3. Turn ignition off. Disconnect instrument cluster. Ensure interior lights are off. Using external ohmmeter, measure resistance between ground and terminal No. 4 (Black/Dark Green wire) in Black instrument cluster connector. If resistance is 5 ohms or less, repair open Black/Dark Green wire. If resistance is more than 5 ohms, go to next step.
4. Connect jumper wire between ground and terminal No. 11 (White/Black wire) on DLC connector. Measure resistance between ground and terminal No. 9 (White/Black wire) on right instrument cluster connector. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open White/Black wire.
5. Disconnect jumper wire. Measure resistance between ground and terminal No. 9 (White/Black wire) on Black instrument cluster connector. If resistance is less than 1000 ohms, repair White/Black wire for short to ground. If resistance is 1000 ohms or more, go to next step.
6. Connect jumper wire between ground and terminal No. 3 (Violet/Brown wire) on DLC connector. Measure resistance between ground and terminal No. 10 (Violet/Brown wire) on Black instrument cluster connector. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open White/Black wire.
7. Disconnect jumper wire. Measure resistance between ground and terminal No. 10 (Violet/Brown wire) on Black instrument cluster connector. If resistance is less than 1000 ohms, repair Violet/Brown wire for short to ground. If resistance is 1000 ohms or more, replace instrument cluster.

TEST 10A - NOT RECEIVING BUS MESSAGES CORRECTLY

Note. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Disconnect anti-lock brake controller module. Controller module is located below battery tray. Turn ignition on. If scan tool displays BUS OPERATIONAL, replace anti-lock brake controller module. If scan tool does not display BUS OPERATIONAL, go to next step.
2. Turn ignition off and wait 2 minutes. Disconnect Air Bag Control Module (ACM). ACM is located under driver seat. Turn ignition on. If scan tool displays BUS OPERATIONAL, go to TEST 18A in AIR BAG RESTRAINT SYSTEM article for further testing. If scan tool does not display BUS OPERATIONAL, go to next step.
3. Disconnect Central Timer Module (CTM). CTM is located on left side of engine cover. Turn ignition on. If scan tool displays BUS OPERATIONAL, replace CTM. If scan tool does not display BUS OPERATIONAL, replace scan tool and/or cable.

TEST 11A - NO BUS BIAS FAILURE

Note. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Remove and inspect fuse No. 11 from junction block. Junction block is behind left kick panel. If fuse is open, go to «TEST 11B»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer__test-11b-no-bus-bias) . If fuse is okay, go to next step.
2. Turn ignition on. Using an external voltmeter, measure voltage between ground and ignition switch output run/start terminal (Dark Blue wire) on fuse No. 11 socket. If voltage is 10 volts or less, repair open Dark Blue wire. If voltage is more than 10 volts, go to next step.
3. Disconnect scan tool from data link connector. Measure voltage between ground and DLC terminal No. 3 (Violet/Brown wire). If voltage is not 1.8-2.8 volts, go to step 5). If voltage is 1.8-2.8 volts, go to next step.
4. Measure voltage between ground and DLC terminal No. 11 (White/Black wire). If voltage is not 1.8-2.8 volts, go to next step. If voltage is 1.8-2.8 volts, replace scan tool cable or scan tool.
5. Connect jumper wire between ground and terminal No. 11 (White/Black wire) on DLC connector. Turn ignition off. Remove instrument cluster. Using external ohmmeter, measure resistance between ground and terminal No. 9 (White/Black wire) on Black instrument cluster connector. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open White/Black wire.
6. Disconnect jumper wire. Measure resistance between ground and terminal No. 9 (White/Black wire) on Black instrument cluster connector. If resistance is less than 1000 ohms, repair White/Black wire for short to ground. If resistance is 1000 ohms or more, go to next step.
7. Connect jumper wire between ground and terminal No. 3 (White/Black wire) on DLC connector. Measure resistance between ground and terminal No. 10 (Violet/Brown wire) on Black instrument cluster connector. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open Violet/Brown wire.
8. Disconnect jumper wire. Measure resistance between ground and terminal No. 10 (Violet/Brown wire) on Black instrument cluster connector. If resistance is less than 1000 ohms, repair Violet/Brown wire for short to ground. If resistance is 1000 ohms or more, go to next step.
9. Reinstall fuse No. 11. Turn ignition on. Using external voltmeter, measure voltage between ground and terminal No. 2 (Dark Blue/White wire) on right instrument cluster connector. If voltage is 9.5 volts or less, repair open Dark Blue/White wire. If voltage is more than 9.5 volts, go to next step.
10. Turn ignition off. Using external ohmmeter, measure resistance between ground and terminal No. 4 (Black/Dark Green wire) on Black instrument cluster connector. If resistance is 5 ohms or less, go to next step. If resistance is more than 5 ohms, repair open Black/Dark Green wire.
11. Measure resistance between ground and terminal No. 7 (Black wire) on Gray instrument cluster connector. If resistance is 5 ohms or less, replace instrument cluster. If resistance is more than 5 ohms, repair open Black wire.

TEST 11B - NO BUS BIAS FAILURE

Note. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

Using external ohmmeter, measure resistance between ground and fused ignition switch output run/start terminal (Dark Blue/White wire) on fuse No. 11 socket. If resistance is less than 5 ohms, repair Dark Blue/White wire for short to ground. Replace fuse No. 11. If resistance is 5 ohms or greater, replace fuse No. 11.

TEST 12A - BUS (+) &/OR BUS (-) OPEN

Note. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Disconnect scan tool. Ensure ignition is on. Using an external voltmeter, measure voltage between ground and DLC terminal No. 3 (Violet/Brown wire). If voltage is not 1.8-2.8 volts, go to step 3). If voltage is 1.8-2.8 volts, go to next step.
2. Measure voltage between ground and DLC terminal No. 11 (White/Black wire). If voltage is not 1.8-2.8 volts, go to next step. If voltage is 1.8-2.8 volts, replace scan tool cable or scan tool.
3. Connect jumper wire between ground and terminal No. 11 (White/Black wire) on DLC connector. Turn ignition off. Remove instrument cluster. Using external ohmmeter, measure resistance between ground and terminal No. 9 (White/Black wire) on Black instrument cluster connector. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open White/Black wire.
4. Disconnect jumper wire. Connect jumper wire between ground and terminal No. 3 (White/Black wire) on DLC connector. Measure resistance between ground and terminal No. 10 (Violet/Brown wire) on Black instrument cluster connector. If resistance is less than 5 ohms, replace instrument cluster. If resistance is 5 ohms or more, repair open Violet/Brown wire.

TEST 13A - NO RESPONSE FROM CENTRAL TIMER MODULE (CTM)

Note. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Remove and inspect fuse No. 11 from junction block. Junction block is behind left kick panel. If fuse is open, go to «TEST 13B»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer__test-13b-no-response-from) . If fuse is okay, go to next step.
2. Install fuse No. 11. Remove and inspect fuse No. 6 from junction block. If fuse is open, go to «TEST 13C»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer__test-13c-no-response-from) . If fuse is okay, go to next step.
3. Install fuse No. 6. Disconnect Central Timer Module (CTM). CTM is located on left side of engine cover. Using external ohmmeter, measure resistance between ground and terminal No. 3 (Black wire) on CTM 18-pin White connector C2. If resistance is more than 5 ohms, repair open Black wire. If resistance is 5 ohms or less, go to next step.
4. Measure resistance between ground and terminal No. 6 (Black/Tan wire) on CTM 14-pin Green connector C1. If resistance is more than 5 ohms, repair open Black/Tan wire. If resistance is 5 ohms or less, go to next step.
5. Turn ignition on. Using scan tool, perform CCD Bus test. Connect jumper wire between ground and terminal No. 16 (Violet/Brown wire) on CTM 18-pin White connector C2. If scan tool does not display BUS (+) SHORT TO GROUND, repair open Violet/Brown wire. If scan tool displays BUS (+) SHORT TO GROUND, go to next step.
6. Disconnect jumper wire. Connect jumper wire between ground and terminal No. 17 (White/Black wire) on CTM 18-pin White connector C2. If scan tool does not display BUS (-) SHORT TO GROUND, repair open White/Black wire. If scan tool displays BUS (-) SHORT TO GROUND, replace CTM.

TEST 13B - NO RESPONSE FROM CENTRAL TIMER MODULE (CTM)

Note. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

Using external ohmmeter, measure resistance between ground and fused ignition switch output run/start terminal (Dark Blue/White wire) on fuse No. 11 socket. If resistance is less than 5 ohms, repair Dark Blue/White wire for short to ground. Replace fuse No. 11. If resistance is 5 ohms or more, replace fuse No. 11.

TEST 13C - NO RESPONSE FROM CENTRAL TIMER MODULE (CTM)

Note. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

Using external ohmmeter, measure resistance between ground and fused ignition switch output run/accy terminal (Dark Blue wire) on fuse No. 6 socket. If resistance is less than 5 ohms, repair Dark Blue wire for short to ground. Replace fuse No. 6. If resistance is 5 ohms or more, replace fuse No. 6.

TEST 14A - NO RESPONSE FROM INSTRUMENT CLUSTER

Note. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE .

1. Disconnect instrument cluster. Using scan tool, turn on internal CCD bus bias under SYSTEM MONITORS, CCD BUS VOLTAGE. Connect jumper wire between ground and Black instrument cluster connector terminal No. 10 (Violet/Brown wire). If scan tool voltage drops to about zero volts, go to next step. If scan tool voltage did not drop to about zero volts, repair open Violet/Brown wire.
2. Connect jumper wire between ground and Black instrument cluster connector terminal No. 9 (White/Black wire). If scan tool voltage drops to about zero volts, replace instrument cluster. If scan tool voltage did not drop to about zero volts, repair open White/Black wire.

TEST VER-1A - VERIFICATION PROCEDURE

1. Reconnect all previously disconnect connectors. Turn ignition on, engine off. Using scan tool, erase all fault messages. Turn ignition off. Wait 10 seconds. Turn ignition on, engine off. Operate system that is malfunctioning. If system does not operate properly, perform «TEST 1A»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer__test-1a-identifying-vehicle-communication) , IDENTIFYING VEHICLE COMMUNICATION PROBLEMS. If system operates properly, go to next step.
2. Using scan tool, read fault messages. If fault messages exist, perform «TEST 1A»(/dodge/ram-van/iii-1994-2003/remont/body-cab-control-systems/#body-control-computer__test-1a-identifying-vehicle-communication) , IDENTIFYING VEHICLE COMMUNICATION PROBLEMS. If fault messages do not exist, repair is complete.

BCM Wiring Diagram. Scheme 12

Data Link Connectors Wiring Diagram. Scheme 13

See also:
• COMPUTER RELEARN PROCEDURES
• A/C-HEATER SYSTEM
• INSTRUMENT PANEL - ANALOG
• CRUISE CONTROL SYSTEM
• STEERING COLUMN SWITCHES
• WIPER/WASHER SYSTEM
• BASIC TESTING - 3.9L
• BASIC TESTING - 5.2L
• CTM MODULE LOCATION
• PRETEST INSPECTION
• CONNECTOR IDENTIFICATION
• CHIME TEST 1A
• DOOR AJAR TEST 1A
• POWER DOOR LOCK TEST 1A
• INSTRUMENT CLUSTER TEST 1A
• INTERIOR LIGHT TEST 1A
• VTSS TEST 1A
• WINDSHIELD WIPER TEST 1A
• VTSS TEST 2A
• POWER DOOR LOCK TEST 2A
• POWER DOOR LOCK TEST 3A
• WINDSHIELD WIPER TEST 2A
• TEST VER-1A - VERIFICATION PROCEDURE
• SYMPTOM ID TEST 1A
• CHIME TEST 2A
• CHIME TEST 3A
• CHIME TEST 4A
• CHIME TEST 5A
• CHIME TEST 6A
• CHIME TEST 7A
• INSTRUMENT CLUSTER TEST 4A
• INSTRUMENT CLUSTER TEST 5A
• INSTRUMENT CLUSTER TEST 3D
• INSTRUMENT CLUSTER TEST 3E
• DOOR AJAR TEST 2A
• DOOR AJAR TEST 3A
• DOOR AJAR TEST 4A
• DOOR AJAR TEST 5A
• DOOR AJAR TEST 6A
• DOOR AJAR TEST 7A
• INSTRUMENT CLUSTER TEST 2A
• INSTRUMENT CLUSTER TEST 3A
• TEST 3A
• INTERIOR LIGHT TEST 2A
• INTERIOR LIGHT TEST 3A
• INTERIOR LIGHT TEST 4A
• INTERIOR LIGHT TEST 5A
• INTERIOR LIGHT TEST 6A
• POWER DOOR LOCK TEST 4A
• POWER DOOR LOCK TEST 5A
• POWER DOOR LOCK TEST 6A
• POWER DOOR LOCK TEST 7A
• POWER DOOR LOCK TEST 8A
• POWER DOOR LOCK TEST 9A
• POWER DOOR LOCK TEST 10A
• POWER DOOR LOCK TEST 11A
• VTSS TEST 3A
• VTSS TEST 4A
• WINDSHIELD WIPER TEST 3A
• WINDSHIELD WIPER TEST 4A
• WINDSHIELD WIPER TEST 5A
• TEST 4A
• TEST 5A
• TEST 6A
• TEST 7A
• TEST 8A
• TEST 9A
• TEST 10A
• TEST 11A
• TEST 12A
• TEST 2A
• TEST 13A
• TEST 14A
• TEST 2B
• TEST 4B
• TEST 4C
• TEST 4D
• TEST 5B
• TEST 11B
• TEST 13B
• TEST 13C
• TEST 1A