Specifications

How to check codes on a 1999 Dodge
The 1999 Dodge Dakota shop manual, page 8E-6 has the following self diagnostic test that checks the
instrument cluster and CCD data bus message-controlled indicator lamps, for the other codes a DRB scan
tool is required.
NOTE: If the ignition switch is turned to the off position during this test, or if a Vehicle speed
message indicating the vehicle is moving is received from the PCM on the CCD data bus during the
test, repeat test if required.
This is one continuous test
1. Ignition switch off
2. Press and hold the trip reset knob
3. Turn the ignition switch to on but do not start.
4. Hold the reset knob for approx 10 seconds or until the word CHEC appears in the display then release.
INSTRUMENT CLUSTER FAILURE MESSAGE
MESSAGE DESCRIPTION CORRECTION
110 A failure has been identified in the
cluster CPU, RAM, or EEPROM.
Replace the faulty cluster
900
The CCD data bus is not operational.
1. Check the CCD data bus
connection at the cluster.
2. Check the cluster fuses.
3. Check the CCD data bus.
4. Check the CCD data bus voltage.
5. Check the CCD data bus
terminations.
920 The cluster is not receiving a vehicle
message from the PCM.
1. Check the PCM software level
and re-flash if required.
2. Use a DRB scan tool to verify that
the vehicle speed message is being
sent by the PCM.
921
The cluster is not receiving a
distance pulse message from the
PCM.
1. Check the PCM software level
and re-flash if required.
2. Use a DRB scan tool to verify that
the distance pulse message is being
sent by the PCM.
940 The cluster is not receiving an airbag
message from the ACM
1. Check the CCD data bus
connections at the ACM.
2. Check the ACM fuse.
1.Check the CCD data bus