RAM 2500 Truck 4WD V8-5.9L VIN Z LDC (1998)
closed again, at any speed above 24 kilometers-per-hour (15 miles-per-hour).
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A programmable feature of the RKE system is the enabling or disabling of the horn chirp following activation of the RKE Lock function. This
feature can be enabled or disabled and, if enabled, the horn chirp duration (twenty or forty milliseconds) can be selected.
Both versions of the CTM are mounted under the driver side end of the instrument panel, inboard of the instrument panel steering column opening.
Refer to Instrument Panel, Gauges and Warning Indicators/Audible Warning Device/Central Timer Module Replacement for the service
procedures.
The programmable features of the CTM can be enabled or disabled using the DRB scan tool as described in the proper Diagnostic Procedures. For
diagnosis of the high-line version of the CTM or of the CCD data bus, a DRB scan tool and the proper Diagnostic Procedures are recommended.
The CTM cannot be repaired and, if faulty or damaged, it must be replaced.
One of the features that the high-line CTM supports and controls is the Vehicle Theft Security System (VTSS). In the VTSS, the CTM receives
hard- wired inputs from the door jamb, door lock cylinder, and ignition switches. The programming in the CTM allows it to process the
information from these inputs and send control outputs to energize or de-energize the headlamp (or security) relay, horn relay, and the security
lamp. The CTM also sends CCD data bus messages to the Powertrain Control Module (PCM) to control the engine no-run feature of the VTSS.
The high-line CTM also contains the receiver and control logic for the power lock and Remote Keyless Entry (RKE) systems, which are integrated
into the arming, disarming, and triggering functions of the VTSS.
For diagnosis of the high-line version of the CTM or of the CCD data bus, a DRB scan tool and the proper Diagnostic Procedures are
recommended. The CTM cannot be repaired and, if faulty or damaged, it must be replaced.
Central Timer Module Diagnostic Trouble Codes
Central Timer Module Diagnostic Trouble Codes
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Door Disarm Switch Failure
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Door Lock Switch Failure
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Door Unlock Switch Failure
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Wiper Park Switch Failure
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EEPROM Checksum Failure
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Internal ROM Test Failure
