Dodge Dakota 2001, Руководство по обслуживанию

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•
High beam indicator driver
•
Horn relay control - high-line with power locks
only
•
Interior lamp driver
•
Left high beam driver
•
Left low beam driver
•
Park lamp relay control
•
Right high beam driver
•
Right low beam driver
•
VTSS indicator driver - high-line with VTSS
only
MESSAGING
The CTM uses the following messages received
from other electronic modules over the PCI data bus:
•
Airbag Deploy (ACM)
•
Beep request (CMTC)
•
Charging System Failure (PCM)
•
Chime request (EMIC)
•
Engine RPM (PCM)
•
OK to Arm VTSS (PCM)
•
Security indicator request (SKIM)
•
System Voltage (PCM)
•
Valid/Invalid Key (SKIM)
•
Vehicle Distance (PCM)
•
Vehicle Speed (PCM)
•
Voltage Fault (PCM)
The CTM provides the following messages to other
electronic modules over the PCI data bus:
•
Door Ajar Status (EMIC)
•
Park Brake Status (CAB, EMIC, TCM)
•
Radio Mode (Radio)
•
Radio Preset Scan (Radio)
•
Radio Seek Down (Radio)
•
Radio Seek Up (Radio)
•
Radio Volume Down (Radio)
•
Radio Volume Up (Radio)
DIAGNOSIS AND TESTING - CENTRAL TIMER
MODULE
The hard wired inputs to and outputs from the
Central Timer Module (CTM) may be diagnosed and
tested using conventional diagnostic tools and meth-
ods. Refer to the appropriate wiring information. The
wiring information includes wiring diagrams, proper
wire and connector repair procedures, further details
on wire harness routing and retention, as well as
pin-out and location views for the various wire har-
ness connectors, splices and grounds.
However, conventional diagnostic methods may not
prove conclusive in the diagnosis of the CTM. In
order to obtain conclusive testing of the CTM, the
Programmable Communications Interface (PCI) data
bus network and all of the electronic modules that
provide inputs to or receive outputs from the CTM
must also be checked. The most reliable, efficient,
and accurate means to diagnose the CTM, the PCI
data bus network, and the electronic modules that
provide inputs to or receive outputs from the CTM
requires the use of a DRBIII
t
scan tool. Refer to the
appropriate diagnostic information. The DRBIII
t
scan tool can provide confirmation that the PCI data
bus network is functional, that all of the electronic
modules are sending and receiving the proper mes-
sages over the PCI data bus, and that the CTM is
receiving the proper hard wired inputs and respond-
ing with the proper hard wired outputs needed to
perform its many functions.
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, DISABLE THE AIRBAG SYSTEM BEFORE
ATTEMPTING ANY STEERING WHEEL, STEERING
COLUMN, SEAT BELT TENSIONER, OR INSTRU-
MENT PANEL COMPONENT DIAGNOSIS OR SER-
VICE. DISCONNECT AND ISOLATE THE BATTERY
NEGATIVE (GROUND) CABLE, THEN WAIT TWO
MINUTES FOR THE AIRBAG SYSTEM CAPACITOR
TO DISCHARGE BEFORE PERFORMING FURTHER
DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE
WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE
TO TAKE THE PROPER PRECAUTIONS COULD
RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT
AND POSSIBLE PERSONAL INJURY.
NOTE: The following tests may not prove conclu-
sive in the diagnosis of the Central Timer Module
(CTM). The most reliable, efficient, and accurate
means to diagnose the CTM requires the use of a
DRBIII
T
scan tool. Refer to the appropriate diagnos-
tic information.
(1) Check the fused B(+) fuses (Fuse 3 - 20
ampere, and Fuse 12 - 20 ampere) in the Power Dis-
tribution Center (PDC). If OK, go to Step 2. If not
OK, repair the shorted circuit or component as
required and replace the faulty fuse.
(2) Check for battery voltage at the fused B(+)
fuses (Fuse 3 - 20 ampere, and Fuse 12 - 20 ampere)
in the PDC. If OK, go to Step 3. If not OK, repair the
open B(+) circuit between the PDC and the battery
as required.
(3) Disconnect and isolate the battery negative
cable. Disconnect the instrument panel wire harness
connector (Connector C3) for the CTM from the CTM
connector receptacle. Reconnect the battery negative
cable. Check for battery voltage at each of the two
fused B(+) circuit cavities of the instrument panel
wire harness connector (Connector C3) for the CTM.
If OK, disconnect and isolate the battery negative
cable, reconnect the instrument panel wire harness
connector (Connector C3) for the CTM to the CTM
connector receptacle, and go to Step 4. If not OK,
AN
ELECTRONIC CONTROL MODULES 8E - 5
CENTRAL TIMER MODULE (Continued)