1999 DODGE RAM can bus

POWER DOOR LOCK SYSTEM
DOOR LOCK SWITCH FAILURE (PDL)
NOTE: For connector terminal identification and wiring diagrams,
see BODY CONTROL COMPUTER - INTRODUCTION article. Perform
VERIFICATION TEST VER-1A after each repair.
CAUTION: Always turn ignition switch to OFF position prior to
disconnecting or connecting any module connector.
1) Clear trouble codes as needed. See BODY CONTROL COMPUTER -
INTRODUCTION article. Using scan tool, read I/O's door lock switch
status. If scan tool displays PRESSED, go to next step. If scan tool
does not display PRESSED, system is currently functioning properly.
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 under
left side of instrument panel. Disconnect CTM 18-pin connector C2.
Using an external voltmeter, measure voltage between ground and CTM
18-pin connector C2 terminal No. 4 (Orange/Dark Green wire). If
voltage is more than 1.5 volts, repair short to voltage in Orange/Dark
Green wire. If voltage is 1.5 volts or less, replace CTM.
DOOR UNLOCK SWITCH FAILURE (PDL)
NOTE: For connector terminal identification and wiring diagrams,
see BODY CONTROL COMPUTER - INTRODUCTION article. Perform
VERIFICATION TEST VER-1A after each repair.
CAUTION: Always turn ignition switch to OFF position prior to
disconnecting or connecting any module connector.
1) Clear trouble codes as needed. See BODY CONTROL COMPUTER -
INTRODUCTION article. 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, system is currently functioning properly.
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 under
left side of instrument panel. Disconnect CTM 18-pin connector C2.
Using an external voltmeter, measure voltage between ground and CTM
18-pin connector C2 terminal No. 13 (Pink/Dark Green wire). If voltage\
is more than 1.5 volts, repair short to voltage in Pink/Dark Green
wire. If voltage is 1.5 volts or less, replace CTM.
AUTOMATIC (ROLLING) DOOR LOCKS INOPERATIVE
NOTE: For connector terminal identification and wiring diagrams,
see BODY CONTROL COMPUTER - INTRODUCTION article. Perform
VERIFICATION TEST VER-1A after each repair.
1) Using scan tool select SYSTEM MONITORS, then CCD BUS TEST.
If scan tool displays BUS OPERATIONAL, go to next step. If scan tool

does not display BUS OPERATIONAL, go to appropriate VEHICLE
COMMUNICATIONS article.
2) Using scan tool select BODY COMPUTER. If scan tool
displays NO RESPONSE, go to appropriate VEHICLE COMMUNICATIONS
article. If scan tool does not displays NO RESPONSE, go to next step.
3) This test is only for vehicles equipped with speed
sensitive door locks. With doors closed and unlocked drive vehicle
faster than 15 MPH. If doors lock, system is currently functioning
properly. If doors do not lock, using scan tool select ROLLING LOCKS.
Retest system.
DOORS LOCK WITH KEY IN IGNITION & LEFT DOOR OPEN
NOTE: For connector terminal identification and wiring diagrams,
see BODY CONTROL COMPUTER - INTRODUCTION article. Perform
VERIFICATION TEST VER-1A after each repair.
CAUTION: Always turn ignition switch to OFF position prior to
disconnecting or connecting any module connector.
1) Using scan tool select SYSTEM MONITORS, then CCD BUS TEST.
If scan tool displays BUS OPERATIONAL, go to next step. If scan tool
does not display BUS OPERATIONAL, go to appropriate VEHICLE
COMMUNICATIONS article.
2) Using scan tool select BODY COMPUTER. If scan tool
displays NO RESPONSE, go to appropriate VEHICLE COMMUNICATIONS
article. If scan tool does not display NO RESPONSE, go to next step.
3) Place key in ignition. Open driver's door. Lock doors from
interior lock switch. If doors locked, go to next step. If doors did
not lock, system is currently functioning correctly.
4) Using scan tool, read left door ajar status. Open and
close left door. If door ajar state changed from OPEN to CLOSED, go to
next step. If door ajar state did not change from OPEN to CLOSED, go
to OPEN LEFT DOOR AJAR CIRCUIT under DOOR AJAR SYSTEM.
5) Ensure driver's door is open. Read key-in ignition status.
If scan tool shows KEY-IN, replace Central Timer Module (CTM). CTM is
located behind right kick panel. If scan tool does not show KEY-IN, go
to next step.
6) Gain access to CTM connector C1. Do not disconnect
connector. Using an external voltmeter, measure voltage between ground
and CTM 14-pin connector C1 terminal No. 9 (Light Blue wire). If
voltage is more than 1.5 volts, repair open Light Blue wire. If
voltage is 1.5 volts or less, go to next step.
7) Turn ignition off and remove key. Measure voltage between
ground and CTM 14-pin connector C1 terminal No. 9 (Light Blue wire).
If voltage is less than 1.5 volts, replace CTM. If voltage is 1.5
volts or more, replace ignition switch.
ONE OR ALL DOORS FAILING TO LOCK FROM ONE SWITCH (ONE OR ALL
DOORS FAILING TO UNLOCK FROM ONE SWITCH)
NOTE: For connector terminal identification and wiring diagrams,
see BODY CONTROL COMPUTER - INTRODUCTION article. Perform
VERIFICATION TEST VER-1A after each repair.
CAUTION: Always turn ignition switch to OFF position prior to
disconnecting or connecting any module connector.
1) Using scan tool select SYSTEM MONITORS, then CCD BUS TEST.
If scan tool displays BUS OPERATIONAL, go to next step. If scan tool
does not display BUS OPERATIONAL, go to appropriate VEHICLE
COMMUNICATIONS article.
2) Using scan tool select BODY COMPUTER. If scan tool

14) Connect test light to ground and probe Orange/Black wire
of door lock actuator connector. If test light illuminates while door
unlock switch is pressed, repair open Orange/Black wire between door
lock actuator and Central Timer Module (CTM). CTM is located behind
right kick panel. If test light does not illuminate while door unlock
switch is pressed, go to next step.
15) Access CTM 18-pin connector C2. Remove connector cover.
Do not disconnect connector. Using an external voltmeter, measure
voltage between ground and CTM 18-pin connector C2 terminal No. 9
(Pink/Black wire). If voltage is more than 9.5 volts while door unlock\
switch is pressed, repair open Pink/Black wire. If voltage is 9.5
volts or less while door unlock switch is pressed, replace CTM.
16) Disconnect inoperative lock switch connector. Using an
external voltmeter, measure voltage between ground and Red wire of
door lock switch connector. If voltage is more than 9.5 volts, repair
open Red wire between door lock switch connector and voltage source.
If voltage is 9.5 volts or less, go to next step.
17) Reconnect door lock switch connector. Measure voltage
between ground and backprobe Pink/Violet wire of door lock switch
connector. If voltage is more than 9.5 volts, go to next step. If
voltage is 9.5 volts or less, replace door lock switch.
18) Access CTM 18-pin connector "B". Remove connector cover.
Do not disconnect connector. Using an external voltmeter, measure
voltage between ground and CTM 18-pin connector "B" terminal No. 13
(Pink/Dark Green wire). If voltage is more than 9.5 volts, replace
CTM. If voltage is 9.5 volts or less, repair open Pink/Dark Green wire
between CTM and door lock switch.
REMOTE KEYLESS ENTRY PROBLEM
NOTE: For connector terminal identification and wiring diagrams,
see BODY CONTROL COMPUTER - INTRODUCTION article. Perform
VERIFICATION TEST VER-1A after each repair.
CAUTION: Always turn ignition switch to OFF position prior to
disconnecting or connecting any module connector.
1) Using scan tool select SYSTEM MONITORS, then CCD BUS TEST.
If scan tool displays BUS OPERATIONAL, go to next step. If scan tool
does not display BUS OPERATIONAL, go to appropriate VEHICLE
COMMUNICATIONS article.
2) Using scan tool select BODY COMPUTER. If scan tool
displays NO RESPONSE, go to appropriate VEHICLE COMMUNICATIONS
article. If scan tool does not display NO RESPONSE, go to next step.
3) Operate door locks with Remote Keyless Entry (RKE)
transmitter. If doors locked when transmitter was actuated, system is
currently functioning properly. If doors do not lock when transmitter
was actuated, go to next step.
4) Ensure transmitter battery voltage is 3.2 volts. Turn
ignition on. Place transmission in park and disarm anti-theft system.
Using scan tool, select MISCELLANEOUS, then PROGRAM RKE. If BCM IS IN
PROGRAMMING MODE does not appear, exit and select PROGRAM RKE again.
Press any transmitter button. A single chime will announce RKE module
accepted transmission. Repeat procedure for all transmitters used with
vehicle. Operate door locks from reprogrammed transmitter. If door
locks operate properly, system has been repaired. If door locks do not
operate properly, go to next step.
5) Using scan tool, reprogram a known good transmitter:
Operate door locks with reprogrammed transmitter. If doors locked
properly, replace transmitter. If doors did not lock properly, replace
CTM.

disarm switch state CLOSED, replace CTM.
23) Turn ignition switch to START position. If horn does not
sound, go to next step. If horn sounds, go to step 24).
24) Locate Central Timer Module (CTM). CTM is located behind\
right kick panel. Disconnect CTM 14-pin connector C1. Using an
external voltmeter, measure voltage between ground and CTM 14-pin
connector C1 terminal No. 8 (Dark Blue/White wire). If voltage is more\
than 10 volts, replace CTM. If voltage is 10 volts or less, repair
open Dark Blue/White wire between CTM and RUN-ACC fuse in junction
block.
WINDSHIELD WIPER SYSTEM
WIPER PARK SWITCH FAILURE
NOTE: For connector terminal identification and wiring diagrams,
see BODY CONTROL COMPUTER - INTRODUCTION article. Perform
VERIFICATION TEST VER-1A after each repair.
CAUTION: Always turn ignition switch to OFF position prior to
disconnecting or connecting any module connector.
NOTE: It takes 8 seconds for wiper park switch failure DTC to set.
1) Using scan tool, clear DTCs. See appropriate SELF-
DIAGNOSTICS article. Operate wipers in low speed, then intermittent
mode. 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) Gain access to wiper motor connector. Using an external
voltmeter, measure voltage between ground and wiper motor terminal No.
2 (Dark Green wire). If voltage is more than 9 volts, go to next step.\
If voltage is 9 volts or less, replace wiper motor.
3) Locate Central Timer Module (CTM). CTM is located under
left side of instrument panel. Using an external voltmeter, measure
voltage between ground and backprobe of CTM 14-pin Green connector C1
terminal No. 11 (Dark Green wire). If voltage is 9 volts or less,
replace CTM. If voltage is more than 9 volts, repair short to voltage
in Dark Green wire between CTM and wiper relay or wiper motor.
INTERMITTENT WIPERS INOPERATIVE
NOTE: For connector terminal identification and wiring diagrams,
see BODY CONTROL COMPUTER - INTRODUCTION article. Perform
VERIFICATION TEST VER-1A after each repair.
CAUTION: Always turn ignition switch to OFF position prior to
disconnecting or connecting any module connector.
1) Using scan tool select CENTRAL TIMER MODULE. If scan tool
displays NO RESPONSE, go to appropriate VEHICLE COMMUNICATIONS
article. If scan tool displays any CCD bus failure message, go to
SYMPTOM IDENTIFICATION. If scan tool does not display NO RESPONSE or
any CCD bus failure message, go to next step.
2) If problem is wipers parking in wrong position, go to next
step. If problem is not wipers parking in wrong position, go to step
5).
3) Gain access to wiper motor connector. Turn wipers on to
low speed. Using an external voltmeter, measure voltage between ground
and wiper motor switch terminal No. 2 (Dark Green wire). If voltage
does not cycle between zero and 12 volts, replace wiper motor. If
voltage cycles between zero and 12 volts, go to next step.

4) Locate Central Timer Module (CTM). CTM is located under
left side of instrument panel. Using an external voltmeter, measure
voltage between ground and backprobe of CTM 14-pin Green connector C1
terminal No. 11 (Dark Green wire). Wipers should be operating at low
speed. If voltage does not cycle between zero and 12 volts, repair
open Dark Green wire between CTM and wiper relay or wiper motor. If
voltage cycles between zero and 10 volts, replace CTM.
5) Using scan tool, monitor intermittent wiper voltage level.
Rotate wiper switch from low intermittent to high intermittent level.
If voltage changes from approximately 2.5 to 12 volts, replace CTM. If
voltage does not change from approximately 2.5 to 12 volts, go to next
step.
6) Disconnect 24-pin multifunction switch connector. Using an
external ohmmeter, measure resistance of White/Dark Blue wire between
multifunction switch connector terminal No. 1 and CTM 14-pin Green
connector C1 terminal No. 12. if resistance is less than 5 ohms,
replace multifunction switch. If resistance is 5 ohms or more, repair
open White/Dark Blue wire between multifunction switch and CTM.
NO WIPER ACTUATION AFTER WASH BUTTON PUSHED
NOTE: For connector terminal identification and wiring diagrams,
see BODY CONTROL COMPUTER - INTRODUCTION article. Perform
VERIFICATION TEST VER-1A after each repair.
CAUTION: Always turn ignition switch to OFF position prior to
disconnecting or connecting any module connector.
1) Using scan tool select Central Timer Module (CTM). If sca\
n
tool displays NO RESPONSE, go to appropriate VEHICLE COMMUNICATIONS
article. If scan tool displays any CCD bus failure message, go to
SYMPTOM IDENTIFICATION. If scan tool does not display NO RESPONSE or
any CCD bus failure message, go to next step.
2) Turn ignition on. If washer system works, go to next step.
If washer system does not work, see appropriate WIPER/WASHER SYSTEMS
article.
3) Using scan tool, actuate washer. If washer pump sense
displays ON, replace CTM. If washer pump sense does not display ON,
repair open Brown wire between CTM 14-pin connector C1 terminal No. 10
and multifunction switch.
WIPER SPEED SENSITIVE FEATURE INOPERATIVE
NOTE: For connector terminal identification and wiring diagrams,
see BODY CONTROL COMPUTER - INTRODUCTION article. Perform
VERIFICATION TEST VER-1A after each repair.
CAUTION: Always turn ignition switch to OFF position prior to
disconnecting or connecting any module connector.
1) Using scan tool select Central timer module (CTM). If sca\
n
tool display is not blank or have a CCD bus failure message, go to
next step. If scan tool display is blank or has a CCD bus failure
message, see appropriate VEHICLE COMMUNICATIONS article.
2) Using scan tool, select Powertrain Control Module (PCM).
If scan tool display is not blank or have a CCD bus failure message,
go to next step. If scan tool display is blank or has a CCD bus
failure message, see appropriate VEHICLE COMMUNICATIONS article.
3) 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 to
approximately 18 seconds, system is currently functioning properly. If
interval between wipes did not decrease to approximately 18 seconds,

Removal (AX15 & NV1500)
1) Shift gear selector into 1st or 3rd gear. Raise and
support vehicle. Disconnect necessary exhaust system components.
Remove "Y" pipe and position remaining pipes for working clearance.
Support transmission adjustable jackstand. Disconnect rear cushion and
mounting bracket from transmission or transfer case.
2) Remove rear crossmember. If transmission will be
disassembled for repair, drain transmission fluid. Disconnect
transmission shift linkage, speedometer cable, transfer case vacuum
lines and clutch hydraulic lines. Lower transmission/transfer case
assembly no more than 3" (76 mm). Reaching around transmission case,
unseat and lift shift lever dust boot. Press shift lever retainer
downward, turn retainer counterclockwise, and lift lever and retainer
out of shift tower.
3) Mark front and rear drive shaft and "U" joint for
reassembly reference. Disconnect and remove both drive shafts. Remove
crankshaft position sensor (AX15). Disconnect transmission/transfer
case assembly vent hoses. Remove slave cylinder from clutch housing.
Remove wire harness from clips on transmission case and transfer case.
4) Support transmission/transfer case assembly with
transmission jack. Secure assembly to jack with safety chains.
Reposition adjustable jackstand under engine. Remove clutch housing
brace rod. Remove clutch housing nuts and bolts. Remove
transmission/transfer case assembly.
Installation
To install, reverse removal procedure. Apply high-temperature
grease to release fork, lever, pivot ball stud and pilot bushing
located in end of crankshaft. Fill transmission with appropriate
fluid, if necessary. Tighten all nuts and bolts to specification. See
TORQUE SPECIFICATIONS table.
Removal (NV 3500)
1) Disconnect negative battery cable. Shift transmission to
Neutral. Open console lid and remove bolts attaching console to floor
pan. Lift cup holder bin and remove bolt attaching console to floor
pan. Lift rear of console and pull console rearward to separate from
shift bezel. Remove console from vehicle. Remove screws attaching
shift boot to floor pan and slide boot upward on lever extension.
2) Remove shift lever extension. Raise and support vehicle.
On 4WD models, remove skid plate, if equipped. Mark drive shaft and
axle yoke for alignment reference. Remove drive shaft. Remove exhaust
"Y" pipe. On 4WD models, disconnect and lower remaining exhaust pipes
for clearance as necessary. Disconnect speed sensor harness connector
and back-up light harness connector.
3) Support engine using adjustable jackstand. If transmission
is to be disassembled for repair, drain lubricant from transmission.
On 4WD models, disconnect transfer case shift linkage at transfer case
range lever and remove shift lever from transmission. Remove
bolts/nuts attaching transmission to rear mount.
4) Support transmission with a transmission jack. Secure
transmission with safety chains. Remove rear crossmember. On 4WD
models, support transfer case with transmission jack and secure
transfer case to jack with safety chains. Remove transfer case
attaching nuts and move transfer case rearward until input gear clears
transmission output shaft.
5) Lower transfer case assembly and remove it from under
vehicle. On 4WD models, remove clutch slave cylinder splash shield, if
equipped. Remove clutch slave cylinder and move aside for working
clearance. Remove starter. Remove transmission splash shield. Remove
transmission harness wires from clips on transmission shift cover.
6) Lower transmission slightly. Remove shift tower and lever
assembly. Remove transmission-to-engine attaching bolts. Slide

transmission and jack rearward until input shaft clears clutch disc.
Lower transmission jack and remove transmission from under vehicle.
Installation
1) To install, reverse removal procedure. Apply high-
temperature grease to pilot bushing located in end of crankshaft. Also
apply grease to release bearing bore, release fork, release fork ball
stud and drive shaft slip yoke. Apply sealer to threads of drain plug
before installing in case.
2) Align reference marks made on drive shaft(s) and "U"
joints during removal. After installing clutch assembly and housing,
tighten housing bolts nearest alignment dowels first. During final
transmission installation, install shims between clutch housing and
transmission at appropriate bolt location. Tighten all nuts and bolts
to specification. See TORQUE SPECIFICATIONS table.
TRANSMISSION (RAM PICKUP)
Removal (NV3500 & NV5600)
1) Disconnect negative battery cable. Shift transmission to
Neutral. Remove shift boot bezel screws and slide boot upward on lever
extension. Remove shift tower and lever assembly. Raise and support
vehicle.
2) On 4WD models, remove skid plate, if equipped. Remove
crankshaft position sensor. Mark drive shaft and axle yoke for
alignment reference. Remove drive shaft. Remove exhaust "Y" pipe. On
4WD models, disconnect and lower remaining exhaust pipes for
clearance, as necessary. Disconnect speed sensor harness connector.
3) Support engine using adjustable jackstand. If transmission
is to be disassembled for repair, drain lubricant from transmission.
On 4WD models, disconnect transfer case shift linkage at transfer case
range lever and remove shift lever from transmission. Remove
bolts/nuts attaching transmission to rear mount.
4) Support transmission with a transmission jack. Secure
transmission with safety chains. Remove rear crossmember. On 4WD
models, support transfer case with transmission jack and secure
transfer case to jack with safety chains. Remove transfer case
attaching nuts and move transfer case rearward until input gear clears
transmission output shaft.
5) Lower transfer case assembly and remove it from under
vehicle. On 4WD models, remove clutch slave cylinder splash shield, if
equipped. Remove clutch slave cylinder and move aside for working
clearance. Remove starter. Remove transmission splash shield. Remove
transmission harness wires from clips on transmission shift cover. On
some models, it may be necessary to remove front axle struts and oil
filter for access and removal clearance.
6) Lower transmission slightly. Remove shift tower and lever
assembly. Remove transmission-to-engine bolts. Slide transmission and
jack rearward until input shaft clears clutch disc. Lower transmission
jack and remove transmission from under vehicle.
Installation
1) To install, reverse removal procedure. Apply high-
temperature grease to pilot bushing located in end of crankshaft. Also
apply grease to release bearing bore, release fork, release fork ball
stud and drive shaft slip yoke.
2) Apply sealer to threads of drain plug before installing in
case. Align reference marks made on drive shaft(s) and axle yoke(s)
during removal. After installing clutch assembly and housing, tighten
housing bolts nearest alignment dowels first. Tighten all nuts and
bolts to specification. See TORQUE SPECIFICATIONS table.
Removal (NV4500 & NV4500HD)

1) Disconnect negative battery cable. Shift transmission to
Neutral. Remove shift boot bezel screws and slide boot upward on lever
extension. Scribe mark position of extension on shank of shift lever.
2) Raise and support vehicle. On 4WD models, remove skid
plate, if equipped. Mark drive shaft and axle yoke for alignment
reference. Remove drive shaft. Remove exhaust "Y" pipe. On 4WD models,
disconnect and lower remaining exhaust pipes for clearance as
necessary. Disconnect speed sensor harness connector and back-up light
harness connector.
3) Support engine using adjustable jackstand. If transmission
is to be disassembled for repair, drain lubricant from transmission.
See Fig. 9 . On 4WD models, disconnect transfer case shift linkage at
transfer case range lever and remove shift lever from transmission.
Remove bolts/nuts attaching transmission to rear mount.
4) Support transmission with a transmission jack. Secure
transmission with safety chains. Remove rear crossmember. On 4WD
models, support transfer case with transmission jack and secure
transfer case to jack with safety chains. Remove transfer case
attaching nuts and move transfer case rearward until input gear clears
transmission output shaft.
5) Lower transfer case assembly and move it from under
vehicle. On 4WD models, remove clutch slave cylinder splash shield, if
equipped. Remove clutch slave cylinder, and move aside. Remove
starter. Remove transmission splash shield. Remove transmission
harness wires from clips on transmission shift cover. On some models,
it may be necessary to remove front axle struts and oil filter for
access and removal clearance.
6) Lower transmission slightly. Remove shift tower and lever
assembly. Remove transmission-to-engine bolts. Slide transmission and
jack rearward until input shaft clears clutch disc. Lower transmission
jack and remove transmission from under vehicle.
Installation
1) To install, reverse removal procedure. Apply high-
temperature grease to pilot bushing located in end of crankshaft. Also
apply grease to release bearing bore, release fork, release fork ball
stud and propeller shift slip yoke.
2) Apply sealer to threads of drain plug before installing in
case. Align reference marks made on drive shaft(s) and axle yoke(s)
during removal. After installing clutch assembly and housing, tighten
housing bolts nearest alignment dowels first.
3) During final transmission installation, install shims
between clutch housing and transmission at appropriate bolt location.
See CLUTCH HOUSING BORE RUNOUT and CLUTCH HOUSING FACE RUNOUT under
CLUTCH HOUSING (RAM PICKUP) under TESTING. Press extension to scribe
mark made during removal. A 0.12-0.20" (3-5 mm) space should exist
between shift lever isolator, top edge of stub shaft and tool lower
jaw. Tighten all nuts and bolts to specification. See TORQUE
SPECIFICATIONS table.
Fig. 9: Identifying Transmission Drain Bolt (NV4500 & NV4500HD)
Courtesy of Chrysler Corp.
CLUTCH ASSEMBLY