RAM 2500 Truck 2WD L6-5.9L DSL Turbo VIN 6 (1998)
The airbag control module may report any of the following diagnostic trouble codes.
For the following codes, replace the airbag control module (ACM) even if set intermittently:
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ACM ACCELEROMETER ...................................................................................................................................... FIRING CAPACITOR LOW
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AECM OUTPUT DRIVER CIRCUIT OPEN ........................................................................................................... LOGIC CAPACITOR LOW
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AECM INTERNAL DIAGNOSTIC CODE # 1 .................................................................................................... SAFING SENSOR SHORTED
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WARNING LAMP DRIVER ERROR
For these codes, refer to the appropriate diagnostic procedure:
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
Warning Lamp Bulb or Driver
Interior Lighting
Interior Lighting
The courtesy lights are controlled by the CTM. The door switches are inputs to the CTM and the courtesy lights are outputs. The glove box lamp and the
ash receiver lamp (if equipped) are not controlled by the CTM. They are hardwired to individual switches and fuses. The ignition key halo lamp is
controlled by the CTM and will remain on for thirty seconds after the door is closed.
The highline CTM also provides for illuminated entry option. If the CTM detects an unlock signal from the RKE transmitter, a door disarm switch input
or the door jamb switch input, the interior courtesy lights will be turned on. The illuminated entry function is canceled if the CTM senses an ignition "on"
condition or the "lock" command from a valid key fob.
If a door is left open or the dome lamp switch is left in the "on" position for more than fifteen minutes, the CTM will extinguish the lamps to avoid
discharging the battery. If the lamps are turned on by rotation of the headlamp panel dimmer switch, the CTM will not be able to turn them off.
Bus Failure Message
Bus Failure Messages
Short to Battery - Either or both of the bus wires are shorted to the battery potential.
Short to 5 Volts - Either or both of the bus wires are shorted to a 5-volt potential.
Short to Ground - Either or both of the bus wires are shorted to ground.
Bus (+)- & Bus (-) Shorted Together - The two bus wires are shorted together.
No Termination - The bus system has lost connection with all of its terminators. The Instrument Cluster (MIC) and Powertrain Controller (PCM) supply
termination for the 1998 Ram Trucks.
Bus Bias Level Too Low - Either of both of the bus wire potentials are significantly below their normal 2.5 volts.
Bus Bias Level Too High - Either of both of the bus wire potentials are significantly above their normal 2.5 volts.
No Bus Bias - The bus system has lost connection with all modules that provide bias. The Instrument Cluster (MIC) provides the CCD bus bias for the
1998 Ram Trucks.
Bus (+) Open - The bus (+) wire has lost connection with termination and/or bias.
