1999 DODGE RAM ESP

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 RELEASED, system is currently
functioning properly. If scan tool does not display RELEASED, go to
next step.
2) Disconnect left door lock switch connector. If scan tool
displays RELEASED, replace left door lock switch. If scan tool does
not display RELEASED, go to next step.
3) Disconnect right door lock switch connector. If scan tool
displays RELEASED, replace right door lock switch. If scan tool does
not display RELEASED, go to next step.
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 between CTM and door lock switch. If voltage is 1.5 volts
or less, replace CTM.
IDENTIFYING VTSS PROBLEMS
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 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









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DTC Message Perform
DOOR DISARM SWITCH FAILURE .............. DOOR DISARM SWITCH FAILURE
DOOR LOCK SWITCH FAILURE .................. DOOR LOCK SWITCH FAILURE
DOOR UNLOCK SWITCH FAILURE .............. DOOR UNLOCK SWITCH FAILURE
EEPROM CHECKSUM FAILURE ................................ Replace CTM
INTERNAL ROM TEST FAILURE .............................. Replace CTM









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2) Select VTSS then MONITORS. If scan tool displays, OK TO
RUN, NOT OK TO ARM, 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 scan tool displays NO RESPONSE TO PCM, see appropriate
VEHICLE COMMUNICATIONS article. If scan tool does not display OK TO
RUN, NOT OK TO ARM or NO RESPONSE TO PCM, go to next step.
3) Using scan tool, actuate horn, headlights and VTSS light
to flash. If horn does not sound, go to next step. If headlights do
not flash, go to step 6). If VTSS light does not flash, go to step 9).\
If all function properly, go to step 12).
4) Press horn button. If horn does not sound, go to
appropriate STEERING COLUMN SWITCHES article. If horn sounds, go to
next step.
5) Locate Central Timer Module (CTM). CTM is located behind

right kick panel. Disconnect CTM 18-pin connector C2. Turn ignition
on. Using an external voltmeter, measure voltage between ground and
CTM 18-pin connector C2 terminal No. 18 (Black/Red wire). If voltage
is more than 9.5 volts, replace CTM. If voltage is 9.5 volts or less,
repair open in Black/Red wire between CTM and horn relay.
6) Remove security relay from Power Distribution Center
(PDC). Turn ignition on. Connect a test light between battery source
and headlight relay connector terminal No. 85 (Red/Dark Blue wire).
Using scan tool, actuate relay. If test light illuminates, replace
security relay. If test light does not illuminate, go to next step.
7) Using an external voltmeter, measure voltage between
battery voltage and security relay connector terminal No. 86
(Red/Orange wire). If voltage is more than 9.5 volts, go to next step.\
If voltage is 9.5 volts or less, repair open in Red/Orange wire
between battery source and security relay.
8) Reinstall security relay. Locate Central Timer Module
(CTM). CTM is located behind right kick panel. Disconnect CTM 18-pin
connector C2. Using an external voltmeter, measure voltage between
ground and CTM 18-pin connector C2 terminal No. 6 (Red/Dark Blue
wire). If voltage is more than 9.5 volts, replace CTM. If voltage is
9.5 volts or less, repair open in Red/Dark Blue wire between CTM and
security relay.
9) Disconnect overhead console 12-pin connector. Using an
external voltmeter, measure voltage between battery and overhead
console 12-pin connector terminal No. 11 (Black wire). Using scan
tool, actuate VTSS indicator light. If voltage is about 10 volts,
replace overhead console. If voltage is not about 10 volts, go to next
step.
10) Measure voltage between ground and overhead console 12-
pin connector terminal No. 5 (Pink wire). Turn ignition on. If voltage\
is more than 10 volts, go to next step. If voltage is 10 volts or
less, repair open Pink wire.
11) Locate Central Timer Module (CTM). CTM is located behind\
right kick panel. Disconnect CTM 18-pin connector C2. Turn ignition
on. Using an external ohmmeter, measure resistance between ground and
CTM 18-pin connector C2 terminal No. 8 (Black wire). If resistance is
5 ohms or more, replace CTM. If resistance is less than 5 ohms, repair
open Black wire between CTM and VTSS indicator light.
12) Using scan tool, place VTSS in diagnostic mode and follow
directions on screen. If TURN KEY TO ACC POSITION is not displayed, go
to step 24). If NO RESPONSE after turning key to accessory position or
TURN KEY TO ACC POSITION is displayed longer than 15 seconds, go to
next step. If neither response is received, go to step 14).
13) Locate Central Timer Module (CTM). CTM is located behind\
right kick panel. Gain access to CTM 18-pin connector C2. Ensure key
is in accessory position. Using an external voltmeter, measure voltage
between ground and backprobe of CTM 18-pin connector C2 terminal No. 5
(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 junction block.
14) Remove key from ignition. Wait 2 seconds after performing
each of the following actions. Open, then close both door. Operate
power door lock switch to lock, then unlock position. Rotate key both
directions in both doors. Ensure each operation is successful. If any
operation is unsuccessful, see VTSS SYMPTOM DIRECTORY table for repair
of failed operation. If all operations are successful, go to step 22).
VTSS SYMPTOM DIRECTORY









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Problem Circuit Go To
Driver's Door Open Or Close ............................... Step 15)

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,

SHOE HARDWARE
SHOES
SOCKETS
SPEED SENSORS (ELECTRONIC WHEEL AND VEHICLE)
STEEL BRAKE LINES
STOPLIGHT SWITCHES
SWITCHES
TIRES
TOOTHED RINGS (TONE WHEEL)
VACUUM BOOSTERS
VACUUM HOSES
VALVES
WHEEL ATTACHING HARDWARE
WHEEL BEARINGS, RACES AND SEALS
WHEEL CYLINDERS
WIRING HARNESSES
INTRODUCTION TO MOTORIST ASSURANCE PROGRAM (MAP)
OVERVIEW OF MOTORIST ASSURANCE PROGRAM
The Motorist Assurance Program is the consumer outreach
effort of the Automotive Maintenance and Repair Association, Inc.
(AMRA). Participation in the Motorist Assurance Program is drawn from
retailers, suppliers, independent repair facilities, vehicle
manufacturers and industry associations.
Our organization's mission is to strengthen the relationship
between the consumer and the auto repair industry. We produce
materials that give motorists the information and encouragement to
take greater responsibility for their vehicles-through proper,
manufacturer-recommended, maintenance. We encourage participating
service and repair shops (including franchisees and dealers) to adopt:\
1) a Pledge of Assurance to their Customers and
2) the Motorist Assurance Program Standards of Service.
All participating service providers have agreed to subscribe
to this Pledge and to adhere to the promulgated Standards of Service
demonstrating to their customers that they are serious about customer
satisfaction.
These Standards of Service require that an inspection of the
vehicle's (problem) system be made and the results communicated to the\
customer according to industry standards. Given that the industry did
not have such standards, the Motorist Assurance Program successfully
promulgated industry inspection communication standards in 1994-95 for
the following systems: Exhaust, Brakes, ABS, Steering and Suspension,
Engine Maintenance and Performance, HVAC, and Electrical Systems.
Further, revisions to all of these inspection communication standards
are continually re-published. In addition to these, standards for
Drive Train and Transmissions have recently been promulgated.
Participating shops utilize these Uniform Inspection & Communication
Standards as part of the inspection process and for communicating
their findings to their customers.
The Motorist Assurance Program continues to work
cooperatively and proactively with government agencies and consumer
groups toward solutions that both benefit the customer and are
mutually acceptable to both regulators and industry. We maintain the
belief that industry must retain control over how we conduct our
business, and we must be viewed as part of the solution and not part
of the problem. Meetings with state and other government officials
(and their representatives), concerned with auto repair and/or
consumer protection, are conducted. Feedback from these sessions is
brought back to the association, and the program adjusted as needed.
To assure auto repair customers recourse if they were not

10.4 volts. FTC P1595 will set if vacuum and vent solenoids do not
respond when actuated by PCM.
Possible Causes:
* Ground circuit open.
* S/C brake switch output circuit open.
* S/C power supply circuit open or shorted.
* S/C servo defective.
* S/C vacuum solenoid control circuit open or shorted.
* S/C vent solenoid control circuit open or shorted.
* Brake switch defective or out of adjustment.
* Defective PCM.
NOTE: For component locations, see COMPONENT LOCATIONS. For
connector terminal identification, see CONNECTOR
IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS.
1) Turn ignition on. Turn Speed Control (S/C) on. Using scan\
tool, actuate S/C vent solenoid. If speed control servo clicks, go to
next step. If S/C servo does not click, go to step 7).
2) Using scan tool, actuate S/C vacuum solenoid. If S/C servo
clicks, go to next step. If S/C servo does not click, go to step 6).
3) Turn ignition on. Using scan tool, actuate S/C vacuum
solenoid. Wiggle wiring harness between S/C servo and brake switch to
PCM while scan tool is still actuating speed control vacuum solenoid.
If wiggling did not cause an interruption of S/C servo actuation, go
to next step. If wiggling caused an interruption of S/C servo
actuation, repair wiring harness as necessary. Perform TEST VER-4A
under VERIFICATION TESTS.
4) Turn ignition off. Inspect S/C wiring and connectors.
Clean or repair as necessary. Perform TEST VER-4A under VERIFICATION
TESTS. If wiring and connectors are okay, go to next step.
5) Using scan tool, actuate S/C vent solenoid. Wiggle wiring
harness between S/C servo and brake switch to PCM while scan tool is
still actuating speed control vacuum solenoid. If wiggling did not
cause interruption of S/C servo actuation, test is complete. If
wiggling caused interruption of S/C servo actuation, repair wiring
harness as necessary. Perform TEST VER-4A under VERIFICATION TESTS.
6) Using scan tool, actuate S/C vent solenoid. Wiggle wiring
harness between S/C servo and brake switch to PCM while scan tool is
still actuating speed control vacuum solenoid. If wiggling did not
cause interruption of S/C servo actuation, go to next step. If
wiggling caused interruption of S/C servo actuation, repair wiring
harness as necessary. Perform TEST VER-4A under VERIFICATION TESTS.
NOTE: Ensure brake pedal is not depressed during the following
steps.
7) Turn ignition off. Disconnect S/C servo 4-pin connector.
Inspect all related wiring and connectors and repair as necessary.
Turn ignition on. Turn S/C switch on. Using a 12-volt test light,
probe brake switch output circuit at S/C servo connector terminal No.
3 (Dark Blue/Red wire). If test light is illuminated and bright, go to\
next step. If test light is dim or not illuminated, go to step 13).
8) Turn ignition off. Using an ohmmeter, check resistance of
ground circuit at S/C servo connector terminal No. 4 (Black wire). If
resistance is 5 ohms or more, repair open ground circuit. Perform TEST
VER-4A under VERIFICATION TESTS. If resistance is less than 5 ohms, go
to next step.
9) Disconnect PCM. Inspect connectors. Clean or repair as
necessary. Using an ohmmeter, measure resistance between ground and
S/C vacuum solenoid control circuit at S/C servo connector terminal

respective differential bearings for reassembly reference.
6) Remove bolt and adjuster lock (if not previously removed)\
.
Loosen, but DO NOT remove, bearing cap bolts. Using Adjuster Rotator
(C-4164), unscrew adjusters from bearing caps. See Figs. 1 and 2.
Remove bolts, bearing caps, adjusters, and differential assembly.
7) Using Holder (C-3281), hold pinion flange. Remove pinion
nut and washer. Scribe reference mark on pinion flange-to-pinion for
reassembly reference. Using appropriate puller, remove pinion flange
from pinion. Remove oil seal for pinion from axle housing. Using soft
drift punch and hammer, drive pinion from axle housing.
NOTE: Front pinion bearing, bearing race, and collapsible spacer
must be replaced after removing pinion from axle housing.
8) Drive pinion bearing races from axle housing. Remove
pinion bearing from pinion. Remove shim(s) located behind pinion
bearing on pinion. Record shim thickness for reassembly reference.
CAUTION: DO NOT remove ring gear from differential carrier unless
components must be replaced or differential carrier flange
runout must be checked.
9) If removing ring gear (and exciter ring on RWAL brake
equipped models), mount differential carrier in soft-jaw vise. Remove
and discard left-hand thread ring gear bolts. Using soft-face hammer,
drive ring gear from differential carrier. Tap exciter ring from
differential carrier, if equipped.
10) If disassembling differential carrier, rotate side gears
and align pinion gears with opening in differential carrier. Remove
pinion gears and pinion gear thrust washers. See Fig. 1. Remove side
gears and side gear thrust washers.
11) If checking differential carrier flange runout, install
differential carrier, bearing races, bearing caps and adjusters in
axle housing. Ensure components are installed in original location.
Thread adjusters into bearing caps.
12) Tighten bearing cap bolts enough to just hold bearing
caps against axle housing. Using Adjuster Rotator (C-4164), tighten
adjuster so no side play exists. Side play can be checked by prying
differential carrier to one side.
13) Install dial indicator on axle housing with stem resting
against differential carrier flange. See Fig. 2. Rotate differential
carrier and note differential carrier flange runout. Replace
differential carrier if runout exceeds .003" (.08 mm).
14) Remove dial indicator, bearing caps, adjusters, bearing
races and differential carrier. Remove differential bearings from
differential carrier (if necessary).
15) Use appropriate puller and adapter (bearing splitter) to\
remove bearing from carrier. On models with Rear Wheel Anti-Lock
(RWAL) brakes, if removing exciter ring, use hammer and soft drift to
tap exciter ring from differential carrier.

Cleaning & Inspection
1) Clean components with solvent and dry with compressed air.
Inspect plates in clutch pack for scoring, wear or damage.
2) Inspect remaining components for damage or wear. Replace
components if necessary.
Reassembly
1) Lubricate clutch pack components with gear lube.
Reassemble clutch packs. Ensure components are installed in correct
sequence and in original location. See Fig. 1. Install clutch pack
retainers on clutch packs.
2) Install clutch packs on respective side gears. Install
differential case on axle shaft. Install clutch pack and lower side
gear in differential case.
3) Install step plate on lower side gear. Install upper side
gear and clutch pack in differential case. Install threaded adapter
disc into upper side gear. Install forcing screw.
4) Tighten forcing screw to compress clutch packs. Install
pinion gears on side gears. Using turning bar, rotate differential
case until hole in differential case is aligned with pinion gears.
Remove turning bar.
5) Lubricate pinion gear thrust washers with gear lube.
Install pinion gear thrust washers. It may be necessary to tighten
forcing screw until pinion gear thrust washers can be installed.
6) Remove forcing screw, step plate and threaded adapter
disc. Using soft-face hammer, tap pinion shaft into differential case.
Install snap rings on pinion shaft (if equipped).
7) Install NEW roll pin. Stake differential case in 2 areas
to retain roll pin. Remove differential case from axle shaft. Install
ring gear on differential case. Install NEW ring gear bolts. DO NOT
reuse bolts. Tighten ring gear bolts evenly in alternating pattern to
specification. See TORQUE SPECIFICATIONS table.
TORQUE SPECIFICATIONS
TORQUE SPECIFICATIONS








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Applications Ft. Lbs. (N.m)\
Axle Housing Cover Bolt .............................. 30-35 (41-47)\
Ring Gear Bolt
Dakota ................................................... 70 (95)\
All Others ..................................... 120-140 (163-190)\









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