battery DODGE RAM 1999 Service Owner's Guide
[x] Cancel search | Manufacturer: DODGE, Model Year: 1999, Model line: RAM, Model: DODGE RAM 1999Pages: 1691, PDF Size: 40.34 MB
Page 180 of 1691
CAUTION: When removing a deployed air bag, wear eye protection, rubber
gloves and a long-sleeve shirt. Powder residue from air bag
deployment may irritate skin and eyes.
CAUTION: Before removing steering wheel, position front wheels in
straight-ahead position and lock steering column by removing
ignition key. Failure to do so could damage clockspring or
cause clockspring to be off-centered. DO NOT hammer on
steering wheel during removal, or collapsible column could be
damaged.
Removal
1) Before proceeding, see SERVICE PRECAUTIONS. Disable air
bag system. See DISABLING & ACTIVATING AIR BAG SYSTEM . Air bag module
is mounted on face of steering wheel. Ensure wheels are pointed
straight-ahead and steering wheel is locked.
2) Remove air bag module-to-steering wheel screws from back
side of steering wheel. Lift air bag module and disconnect electrical
connectors from rear of module.
Installation
Connect air bag, cruise control and horn harness connectors
to rear of air bag module. Secure module to steering wheel. Tighten
air bag module-to-steering wheel screws to specification. See
TORQUE SPECIFICATIONS . DO NOT connect negative battery cable at this
time. Go to SYSTEM OPERATION CHECK .
PASSENGER-SIDE AIR BAG MODULE
Removal
1) Before proceeding, see SERVICE PRECAUTIONS. Disable air
bag system. See DISABLING & ACTIVATING AIR BAG SYSTEM .
2) Open glove box. Holding glove box door, push center of
glove box bin towards front of vehicle. Flex glove box bin far enough
so glove box stops will clear sides of instrument panel opening. Roll
glove box down until stop bumpers are beyond sides of instrument panel
opening. Release bin. Lift bottom of glove box upward to disengage
hinge hooks form hinge pins.
3) Remove 3 screws securing instrument panel glove box
opening upper trim strip to instrument panel glove box opening upper
reinforcement, then remove trim strip. Remove 4 screws that secure 2
plastic support brackets of passenger-side air bag door panel outlet
housing to glove box opening upper reinforcement.
4) Reach through and above glove box opening to access and
disconnect air bag module harness connector. Remove 2 screws securing
passenger-side air bag module front bracket to instrument panel
structural support. Remove 3 screws securing passenger-side air bag
module rear bracket to glove box opening upper reinforcement.
5) Using trim stick, gently pry passenger-side air bag door
(starting at lower left edge) away from instrument panel top cover.
Remove air bag module, air bag door and panel outlet housing and
barrel assembly from instrument panel as a unit.
Installation
To install, reverse removal procedure. Ensure air bag door is
securely attached to instrument panel. Ensure air bag harness
connector latches fully engaged. DO NOT connect negative battery cable
at this time. Go to SYSTEM OPERATION CHECK .
CLOCKSPRING
CAUTION: Failure to position wheels in the straight-ahead position
with steering wheel locked when removing steering wheel could
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damage clockspring and/or require clockspring to be
readjusted.
NOTE: Clockspring is self-centering and will automatically lock in
the centered position when steering wheel is removed.
Adjustment is only required if centering position is
disturbed.
Removal
1) Before proceeding, see SERVICE PRECAUTIONS. Disable air
bag system. See DISABLING & ACTIVATING AIR BAG SYSTEM .
2) Clockspring is located behind steering wheel. See Fig. 1.
Ensure front wheels are in straight-ahead position. Lock steering
wheel. Remove air bag module. See AIR BAG MODULE.
3) Remove steering wheel nut. Using appropriate steering
wheel puller, remove steering wheel. When steering wheel is removed,
self-centering clockspring will automatically lock in place. Remove
upper and lower steering column shrouds to gain access to clockspring
wiring.
4) Remove knee bolster (if equipped). Disconnect Yellow 2-wa\
y
clockspring harness connector between clockspring and instrument panel
wiring harness, at base of steering column. See Fig. 13. Remove
clockspring by releasing 2 tabs on side of clockspring. Clockspring
cannot be repaired and must be replaced if faulty.
Installation
1) Snap clockspring onto steering column. If clockspring
centering adjustment is disturbed, adjust clockspring before
installing steering wheel. See CLOCKSPRING CENTERING under
ADJUSTMENTS. Connect clockspring wiring connectors. Install steering
column covers. Install knee bolster (if removed).
2) Position steering wheel on steering column. Ensure flats
on steering wheel hub fit formations on inside of clockspring. Pull
clockspring, cruise control switch (if equipped) and horn wires
through lower large holes and upper small holes in steering wheel.
3) Install steering wheel retaining nut and tighten to 45 ft.
lbs. (61 N.m). Connect horn and cruise control wires (if equipped).
Connect clockspring wire to air bag module. To ensure complete
connector connection, latching arms must be visible on top of
connector housing. DO NOT connect negative battery cable at this time.
Go to SYSTEM OPERATION CHECK .
PASSENGER AIR BAG DISARM (PAD) SWITCH
Removal & Installation
1) Before proceeding, see SERVICE PRECAUTIONS. Disable air
bag system. See DISABLING & ACTIVATING AIR BAG SYSTEM .
2) If vehicle is equipped with automatic transmission, turn
ignition switch to UNLOCK position, set parking brake and place
transmission selector lever in LOW position. Tilt steering column to
lowest position (if equipped). Using trim stick, gently pry around
perimeter of cluster bezel and remove bezel.
3) Open glove box. Holding glove box door, push center of
glove box bin towards front of vehicle. Flex glove box bin far enough
so glove box stops will clear sides of instrument panel opening. Roll
glove box down until stop bumpers are beyond sides of instrument panel
opening. Release bin. Lift bottom of glove box upward to disengage
hinge hooks form hinge pins.
4) Reach through glove box opening to access and disconnect 2
passenger-side air bag disarm switch harness connectors. Connectors
are attached to bracket located on inboard glove box opening
reinforcement. See Fig. 4. Remove 3 screws retaining passenger-side
air bag disarm switch bezel to instrument panel.
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5) Remove 3 screws securing passenger-side disable switch to
back of switch bezel and remove switch from bezel.
6) To install, reverse removal procedure. Tighten PAD switch
mounting screws to specification. See TORQUE SPECIFICATIONS. DO NOT
connect negative battery cable at this time. Go to
SYSTEM OPERATION CHECK .
Fig. 4: Identifying PAD Switch Connectors
Courtesy of DaimlerChrysler Corp.
ADJUSTMENTS
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![DODGE RAM 1999 Service Owners Guide TORQUE SPECIFICATIONS \
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TORQUE SPECIFICATIONS \
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Application Ft. Lbs. (N.m)
Steering Wheel Nut ............................... 45 (61)
INCH Lbs. (N.m)
ACM Mounting Screws &
Support Bracket Nuts ........................ 125 (14.0)
Driver-Side Air Bag Module Screws .......... 80-100 (9-11)
Front Impact Sensor Screws ............... 40-50 (4.5-5.6)
PAD Switch Mounting Screws ...................... 20 (2.2)
Passenger-Side Air Bag Module Screws ............ 80 (9.0)
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DIAGNOSIS & TESTING
* PLEASE READ THIS FIRST *
WARNING: Always follow air bag service precautions to avoid air bag
deployment and possible personal injury. Refer to procedure
under SERVICE PRECAUTIONS . After component replacement,
ensure proper system operation. See SYSTEM OPERATION CHECK.
CAUTION: When battery is disconnected, vehicle computer and memory
systems may lose memory data. Driveability problems may
exist until computer systems have completed a relearn cycle.
See COMPUTER RELEARN PROCEDURES in GENERAL INFORMATION.
NOTE: Although other scan tools are available, manufacturer
recommends using Diagnostic Readout Box (DRB) tester to
access SRS on-board diagnostics. Following diagnosis and
testing procedures are designed for use with DRB.
SELF-DIAGNOSTIC SYSTEM
SRS is monitored by Air Bag Control Module (ACM). ACM
contains safing sensor, an integral sensor in circuitry of system,
which is used to deploy air bag modules.
ACM monitors critical input and output circuits within air
bag system, ensuring they operate correctly. Some circuits are tested
continuously; others are checked under certain conditions. ACM
provides information about air bag system, through AIR BAG warning
light and DRB tester. Each circuit monitored by ACM has a
corresponding fault code or fault message assigned to it.
Active Codes
A code becomes active as soon as a malfunction is detected.
An active trouble code indicates an on-going malfunction. This means
the defect is currently there every time the ACM checks that
circuit/function. An active trouble code can not be erases. Active
codes will automatically erase when the reason for the code has been
corrected.
With the exception of warning light trouble codes or
malfunctions, when a malfunction is detected, AIR BAG warning light
remains illuminated for a minimum of 12 seconds or as long as the
malfunction is present.
Stored Codes
Trouble codes are automatically stored in ACM memory as soon
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as the malfunction is detected. A stored code indicates there was an
active code present at some time. However, the code currently may not
be present as an active code, although another active code could be.
When a trouble code occurs, the AIR BAG warning light
illuminates for 12 seconds minimum (even if problem existed for less
than 12 seconds). Code is stored, along with time in minutes it was
active, and number of times ignition has been cycled since problem was
detected.
When and if malfunction ceases to exist, an ignition cycle
count will be initiated for that code. If ignition cycle count reaches
100 without a reoccurrence of the same malfunction, DTC is erased and
that ignition cycle counter is reset to zero. If malfunction reoccurs
before count reaches 100, ignition cycle counter will be reset and DTC
will continue to be a stored code.
If a particular code is not active while performing
diagnostic test for that code, code diagnostic test may not locate the
source of the problem. In this case, stored code can only indicate an
area of system to inspect.
If no obvious problems are found, erase stored codes, and
with ignition on, wiggle wiring harness and connectors. Recheck for
codes periodically as you work through system. This procedure may
uncover a difficult problem to locate.
PRETEST INSPECTION & DIAGNOSTIC PROCEDURE
Following precautions and procedures must be followed:
* Always follow air bag service precautions to avoid air bag
deployment and possible personal injury. Refer to procedure
under See SERVICE PRECAUTIONS.
* After component replacement, ensure proper system operation.
See SYSTEM OPERATION CHECK .
* When testing voltage or continuity at ACM, use terminal side
(not wire end) of connector. DO NOT probe wire through
insulation.
* Always check if any TECH SERVICE BULLETINS (TSBs) apply to
vehicle.
* When using diagnostic charts, DO NOT skip any steps in chart
or incorrect diagnosis may result. Always perform
SYSTEM OPERATION CHECK after repairs are made.
* Always use most current DRB diagnostic program cartridge
available to prevent erroneous codes or test results.
* When using diagnostic charts, use DRB voltmeter unless
instructed to use an external voltmeter. Never use a test
light in place of a voltmeter.
* When performing electrical tests, prevent accidental
shorting of terminals. Such shorts can damage fuses or
components and may cause a second code (message) to be
set, making diagnosis of original problem more difficult.
* Vehicle must have a fully-charged battery and functional
charging system.
* Each time a connector is disconnected, inspect it to ensure
it is in good condition. Always focus on circuit being
tested. Dirt, water and corrosion, are most common problems
in connectors.
* Always disconnect DRB after use.
* Always disconnect DRB before charging battery.
USING DRB
1) Refer to DRB user guide for instructions and assistance
with reading trouble codes and other DRB functions. Under normal
operation DRB will display one of only 2 error messages: User-
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Requested WARM boot or User-Requested COLD boot. If DRB should display
any other error message, record entire display and contact
manufacturer.
2) If DRB does not power-up, check for loose cable
connections or a bad cable. Check vehicle battery voltage (data link
connector terminal No. 16). A minimum of 11 volts is required to
adequately power DRB.
3) If all connections are proper between DRB and vehicle or
other devices, and vehicle battery is fully charged, an inoperative
DRB may be result of faulty cable or vehicle wiring.
ENTERING ON-BOARD DIAGNOSTICS
1) Before entering on-board diagnostics, refer to
PRETEST INSPECTION & DIAGNOSTIC PROCEDURE . Connect DRB to data link
connector. Data link connector (DLC) is located under left side of
instrument panel, left of steering column.
NOTE: Read active DTCs with PAD switch in both ON and OFF
positions. Always turn ignition off before changing PAD
switch positions,
2) Turn ignition switch to ON position. Exit vehicle with
DRB. Using DRB, read and record active Diagnostic Trouble Code (DTC)
data. Read and record stored DTC data. If any DTCs (fault messages)
exist, perform appropriate test.
3) If PAD switch OFF indicator fails to illuminate when in
the OFF position, go to PAD SWITCH INDICATOR PROBLEMS . If PAD switch
OFF indicator illuminates when switch is in ON position or key
cylinder does not operate, replace PAD switch.
4) Air Bag Control Module (ACM) may report any of the
following DTCs or fault messages. If the following active or stored
codes are reported by DRB, replace ACM. See
AIR BAG CONTROL MODULE (ACM) under REMOVAL & INSTALLATION.
* ACM OUTPUT DRIVER CIRCUIT OPEN
* ACM ACCELEROMETER
* ACM INTERNAL DIAGNOSTIC CODE #1
* WARNING LAMP DRIVER ERROR
* FIRING CAPACITOR LOW
* LOGIC CAPACITOR LOW
* SAFING SENSOR SHORTED
If the following active codes are reported by DRB, go to the
appropriate procedure under DIAGNOSTIC TESTS.
* CLUSTER MESSAGE MISMATCH
* DRIVER SQUIB CIRCUIT OPEN
* DRIVER SQUIB CIRCUIT SHORTED
* DRIVER SQUIB CIRCUIT SHORTED TO BATTERY
* DRIVER SQUIB CIRCUIT SHORTED TO GROUND
* LOSS OF IGNITION RUN ONLY
* LOSS OF IGNITION RUN/START
* NO CLUSTER CCD MESSAGE
* NO CCD COMMUNICATION
* MISSING OR INVALID VIN
* PASSENGER SQUIB CIRCUIT OPEN
* PASSENGER SQUIB CIRCUIT SHORTED
* PASSENGER SQUIB CIRCUIT SHORTED TO BATTERY
* PASSENGER SQUIB CIRCUIT SHORTED TO GROUND
* SCTM FAILURE
* SCTM MESSAGE MISMATCH
* VIN MESSAGE MISMATCH
Page 196 of 1691
it to ensure it is in good condition. Always focus on circuit
being tested. Dirt, water and corrosion, are most common
problems in connectors. Due to manufacturer changes in wire
colors, use terminal identification whenever possible.
1) Disconnect battery and wait 2 minutes before proceeding.
Disconnect driver-side air bag module squib connector. Connect a
jumper wire between driver-side air bag (squib) 2-pin connector
terminal No. 1 (Black/Light Blue wire) and terminal No. 2 (Dark
Green/Light Blue wire). Turn ignition on (engine off). Reconnect
battery. Using DRB, read active codes. If DRB displays DRIVER SQUIB
CIRCUIT SHORTED, replace driver-side air bag module. If not, go to
next step.
2) Disconnect clockspring 2-pin connector. Connect a jumper
wire between clockspring 2-pin connector terminals No. 1 (Black/Light
Blue wire) and No. 2 (Dark Green/Light Blue wire). Using DRB, read
active codes. If DRB displays DRIVER SQUIB CIRCUIT SHORTED, replace
clockspring. If not, go to next step.
3) Disconnect battery and wait 2 minutes before proceeding.
Remove jumper wires. Disconnect ACM connector. ACM is located under
instrument panel, on transmission tunnel. Using an ohmmeter, check
resistance between ACM connector terminal No. 6 (Dark Green/Light Blue
wire) and clockspring 2-pin connector terminal No. 2 (Dark Green/Light\
Blue wire). If resistance is less than 5 ohms, go to next step. If
resistance is more than 5 ohms, repair open or high resistance in Dark
Green/Light Blue wire.
4) Check resistance between ACM connector terminal No. 5
(Black/Light Blue wire) and clockspring 2-pin connector terminal No. 1\
(Black/Light Blue wire). If resistance is less than 5 ohms, go to next\
step. If resistance is more than 5 ohms, repair open or high
resistance in Black/Light Blue wire.
5) If there are no potential causes for this DTC remaining,
ACM is assumed to be defective. Replace ACM. See
AIR BAG CONTROL MODULE (ACM) under REMOVAL & INSTALLATION.
DRIVER SQUIB CIRCUIT SHORTED
NOTE: Perform AIR BAG VERIFICATION TEST after
all repairs. Each time a connector is disconnected, inspect
it to ensure it is in good condition. Always focus on circuit
being tested. Dirt, water and corrosion, are most common
problems in connectors. Due to manufacturer changes in wire
colors, use terminal identification whenever possible.
1) Disconnect battery and wait 2 minutes before proceeding.
Ensure driver-side air bag module connector is completely connected
before disconnecting it. If driver-side air bag module connector is
not completely connected, reconnect it. If driver-side air bag
connector is completely connected, go to next step.
2) Disconnect driver-side air bag module. Turn ignition on
(engine off). Reconnect battery. Using DRB, read active codes. If DRB
displays DRIVER SQUIB CIRCUIT OPEN, replace driver-side air bag
module. If not, go to next step.
3) Disconnect clockspring 2-pin connector. Using DRB, read
active codes. If DRB displays DRIVER SQUIB CIRCUIT OPEN, replace
clockspring. If not, go to next step.
4) Turn ignition off, disconnect battery and wait 2 minutes
before proceeding. Disconnect passenger-side air bag module connector.
Using an ohmmeter, check resistance between clockspring 2-pin
connector terminal No. 1 (Black/Light Blue wire) and passenger-side
air bag 2-pin connector terminal "A" (Black/Yellow wire). If
resistance is less than 5 ohms, repair short between Black/Light Blue
wire and Black/Yellow wire. If resistance is more than 5 ohms, go to
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![DODGE RAM 1999 Service Owners Guide next step.
5) Using an ohmmeter, check resistance between clockspring 2-
pin connector terminals No. 1 (Black/Light Blue wire) and No. 2 (Dark\
Green/Light Blue wire). If resistance is less](/img/12/56915/w960_56915-196.png "DODGE RAM 1999 Service Owners Guide next step.
5) Using an ohmmeter, check resistance between clockspring 2-
pin connector terminals No. 1 (Black/Light Blue wire) and No. 2 (Dark\
Green/Light Blue wire). If resistance is less")
next step.
5) Using an ohmmeter, check resistance between clockspring 2-
pin connector terminals No. 1 (Black/Light Blue wire) and No. 2 (Dark\
Green/Light Blue wire). If resistance is less than 5 ohms, repair
short between Dark Green/Light Blue wire and Black/Light Blue wire. If
resistance is more than 5 ohms, go to next step.
6) If there are no potential causes for this DTC remaining,
ACM is assumed to be defective. Replace ACM. See
AIR BAG CONTROL MODULE (ACM) under REMOVAL & INSTALLATION.
DRIVER SQUIB CIRCUIT SHORTED TO BATTERY
NOTE: Perform AIR BAG VERIFICATION TEST after
all repairs. Each time a connector is disconnected, inspect
it to ensure it is in good condition. Always focus on circuit
being tested. Dirt, water and corrosion, are most common
problems in connectors. Due to manufacturer changes in wire
colors, use terminal identification whenever possible.
1) Disconnect battery and wait 2 minutes before proceeding.
Disconnect driver-side air bag module. Turn ignition on and reconnect
battery. Using DRB, read active codes. If DRB does not display DRIVER
SQUIB CIRCUIT SHORTED TO VOLTAGE, replace driver-side air bag module.
If DRB displays DRIVER SQUIB CIRCUIT SHORTED TO VOLTAGE, go to next
step.
2) Disconnect clockspring 2-pin connector. Using DRB, read
active codes. If DRB does not display DRIVER SQUIB CIRCUIT SHORTED TO
VOLTAGE, replace clockspring. If DRB displays DRIVER SQUIB CIRCUIT
SHORTED TO VOLTAGE, go to next step.
3) Disconnect battery and wait 2 minutes before proceeding.
Disconnect ACM 23-pin connector. Using a voltmeter, check voltage
between ground and clockspring connector terminals No. 1 (Black/Light
Blue wire) and No. 2 (Dark Green/Light Blue wire). If voltage is more\
than 5 volts on either circuit, repair short to voltage in Dark
Green/Light Blue wire or Black/Light Blue wire. If voltage is less
than 5 volts on either circuit, go to next step.
4) If there are no potential causes for this DTC remaining,
ACM is assumed to be defective. Replace ACM. See
AIR BAG CONTROL MODULE (ACM) under REMOVAL & INSTALLATION.
DRIVER SQUIB CIRCUIT SHORTED TO GROUND
NOTE: Perform AIR BAG VERIFICATION TEST after
all repairs. Each time a connector is disconnected, inspect
it to ensure it is in good condition. Always focus on circuit
being tested. Dirt, water and corrosion, are most common
problems in connectors. Due to manufacturer changes in wire
colors, use terminal identification whenever possible.
1) Disconnect battery and wait 2 minutes before proceeding.
Disconnect driver-side air bag module. Turn ignition on (engine off)
and reconnect battery. Using DRB, read active codes. If DRB does not
display DRIVER SQUIB CIRCUIT SHORTED TO GROUND, replace driver-side
air bag module. If DRB displays DRIVER SQUIB CIRCUIT SHORTED TO
GROUND, go to next step.
2) Disconnect clockspring 2-pin connector. Using DRB, read
active codes. If DRB does not display DRIVER SQUIB CIRCUIT SHORTED TO
GROUND, replace clockspring. If DRB displays DRIVER SQUIB CIRCUIT
SHORTED TO GROUND, go to next step.
3) Disconnect battery and wait 2 minutes before proceeding.
Disconnect ACM 23-pin connector. Using an ohmmeter, check resistance
between ground and clockspring connector terminals No. 1 (Black/Light
Blue wire) and No. 2 (Dark Green/Light Blue wire). If resistance is
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more than 5 ohms on either circuit, repair short to ground in Dark
Green/Light Blue wire or Black/Light Blue wire. If resistance is less
than 5 ohms on either circuit, go to next step.
4) If there are no potential causes for this DTC remaining,
ACM is assumed to be defective. Replace ACM. See
AIR BAG CONTROL MODULE (ACM) under REMOVAL & INSTALLATION.
LOSS OF IGNITION RUN ONLY
NOTE: Perform AIR BAG VERIFICATION TEST after
all repairs. Each time a connector is disconnected, inspect
it to ensure it is in good condition. Always focus on circuit
being tested. Dirt, water and corrosion, are most common
problems in connectors. Due to manufacturer changes in wire
colors, use terminal identification whenever possible.
1) Remove and inspect fuse No. 18 located in junction block.
If fuse is blown, go to step 5). If fuse is good, go to next step.
2) Using a voltmeter, check voltage between ground and
ignition switch output RUN circuit at fuse No. 18. If voltage is less
than 10 volts, repair open ignition switch output RUN circuit. If
voltage is more than 10 volts, go to next step.
3) Reinstall fuse No. 18. Disconnect battery and wait 2
minutes before proceeding. Disconnect ACM connector. Turn ignition on,
then reconnect battery. Using a voltmeter, check voltage between
ground and ACM connector terminal No. 15 (Dark Blue/Yellow wire). If
voltage is more than 10 volts, go to next step. If voltage is less
than 10 volts, repair open in Dark Blue/Yellow wire.
4) If there are no potential causes for this DTC remaining,
ACM is assumed to be defective. Replace ACM. See
AIR BAG CONTROL MODULE (ACM) under REMOVAL & INSTALLATION.
5) Turn ignition off. Using an ohmmeter, check resistance
between ground and fused ignition switch output RUN circuit at fuse
No. 18. If resistance is more than 5 ohms, replace fuse No. 18 located
in junction block. If resistance is less than 5 ohms, go to next step.
6) Disconnect battery and wait 2 minutes before proceeding.
Disconnect ACM connector. Using an ohmmeter, check resistance between
ground and ACM connector terminal No. 15 (Dark Blue/Yellow wire). If
resistance is less than 5 ohms, repair fused ignition switch output
RUN circuit for a short to ground and replace fuse. If resistance is
more than 5 ohms, go to next step.
7) If there are no potential causes for this DTC remaining,
ACM is assumed to be defective. Replace ACM and fuse No. 18. See
AIR BAG CONTROL MODULE (ACM) under REMOVAL & INSTALLATION.
LOSS OF IGNITION RUN/START
NOTE: Perform AIR BAG VERIFICATION TEST after
all repairs. Each time a connector is disconnected, inspect
it to ensure it is in good condition. Always focus on circuit
being tested. Dirt, water and corrosion, are most common
problems in connectors. Due to manufacturer changes in wire
colors, use terminal identification whenever possible.
1) Remove and inspect fuse No. 19. If fuse is blown, go to
step 5). If fuse is good, go to next step.
2) Using a voltmeter, measure ignition switch output
RUN/START circuit between fuse No. 19 and ground. If voltage is less
than 10 volts, repair open ignition switch output RUN/START circuit.
If voltage is more than 10 volts, reinstall fuse No. 19. Disconnect
battery and wait 2 minutes before proceeding. Go to next step.
3) Disconnect ACM connector. Turn ignition on. Reconnect
battery. Using a voltmeter, check voltage between ground and ACM
Page 199 of 1691
connector terminal No. 14 (Light Green/Yellow wire). If voltage is
less than 10 volts, repair open in Light Green/Yellow wire. If voltage
is more than 10 volts, replace ACM.
4) If there are no potential causes for this DTC remaining,
ACM is assumed to be defective. Replace ACM. See
AIR BAG CONTROL MODULE (ACM) under REMOVAL & INSTALLATION.
5) Turn ignition off. Turn PAD switch to the ON position (if
equipped). Using an ohmmeter, check resistance at fused ignition
switch output RUN/START circuit between fuse No. 19 and ground. If
resistance is more than 5 ohms, replace fuse. If resistance is less
than 5 ohms, disconnect battery and wait 2 minutes before proceeding.
Disconnect ACM connector. Using an ohmmeter, check resistance between
ground and ACM connector terminal No. 14 (Light Green/Yellow wire). If\
resistance is less than 5 ohms, go to next step. If resistance is more
than 5 ohms, replace ACM and fuse No. 19.
6) Disconnect PAD switch. Using an ohmmeter, check resistance
between ground and ACM connector terminal No. 14 (Light Green/Yellow
wire). If resistance is less than 5 ohms, repair short to ground in
Light Green/Yellow wire and replace fuse No. 19. If resistance is more
than 5 ohms, replace fuse No. 19 located in junction block and go to
next step.
7) If there are no potential causes for this DTC remaining,
ACM is assumed to be defective. Replace ACM. See
AIR BAG CONTROL MODULE (ACM) under REMOVAL & INSTALLATION.
MISSING OR INVALID VIN MESSAGE
NOTE: Perform AIR BAG VERIFICATION TEST after
all repairs. Each time a connector is disconnected, inspect
it to ensure it is in good condition. Always focus on circuit
being tested. Dirt, water and corrosion, are most common
problems in connectors. Due to manufacturer changes in wire
colors, use terminal identification whenever possible.
1) Using DRB, select ENGINE PCM. If DRB displays NO RESPONSE
from PCM, go to NO RESPONSE FROM POWERTRAIN CONTROL MODULE under
VEHICLE COMMUNICATIONS. If DRB does not display NO RESPONSE from PCM
and vehicle is a Club Cab (BE) model, go to next step. If vehicle is
not a Club Cab (BE model), go step 3).
2) Using DRB, select PASSIVE RESTRAINTS, AIRBAG AND MONITORS.
Select VIN type (7th digit of VIN; VIN 2 or 3 on Club Cab). If DRB
does not display PCM VIN: BE, replace Powertrain Control Module (PCM).\
If DRB displays PCM VIN: BE, replace ACM.
3) Using DRB, select PASSIVE RESTRAINTS, AIRBAG AND MONITORS.
Select VIN type (7th digit of VIN; VIN 6 on Standard Cab). If DRB does\
not display PCM VIN: BR, replace Powertrain Control Module (PCM). If
DRB displays PCM VIN: BR, replace ACM.
NO CCD COMMUNICATION
NOTE: Perform AIR BAG VERIFICATION TEST after
all repairs. Each time a connector is disconnected, inspect
it to ensure it is in good condition. Always focus on circuit
being tested. Dirt, water and corrosion, are most common
problems in connectors. Due to manufacturer changes in wire
colors, use terminal identification whenever possible.
Using DRB, read active codes. If DRB displays NO CCD
COMMUNICATION as an active code, replace ACM. If DRB does not display
NO CCD COMMUNICATION as an active code, go to
REPAIRING STORED TROUBLE CODES .
NO CLUSTER CCD MESSAGE