Chrysler 300M 1999 Manual page 305

TEST 1A
IDENTIFYING INSTRUMENT CLUSTER PROBLEMS
Perform TEST SYMPTOM IDENTIFICATION 1A Before Proceeding
Ensure there is communication with the body control module before proceeding. If any communi-
cation problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .perform ''Vehicle Communication'' TEST 1A.
1. With the DRB, select ''Body System'', ''Body Computer'', ''Sensors''. Read the ''Ignition
Voltage''. If it does not show battery voltage when the ignition key is on . . . .perform ''Vehicle
Communication'' TEST 14A.
2. Turn the ignition on. With the DRB select ''Electro/Mech Cluster''. If the DRB shows ''No
Response'' . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .perform ''Vehicle Communication'' TEST 6A.
3. With the DRB, select ''Monitor Display'', then ''PCI Bus Engine Info.''. If the DRB shows ''No
Response'' . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .perform ''Vehicle Communication'' TEST 8A.
4. With the DRB, select ''Electro/Mech Cluster'', then ''Read DTCs.''
− If the DRB displays
''EATX Bus Communication Failure". . . . . . . .perform ''Vehicle Communication'' TEST 10A.
− If DRB displays
''SBEC Bus Communication Failure'' . . . . . . . .perform ''Vehicle Communication" TEST 8A.
− If DRB displays
''Airbag Bus Communication Failure'' . . . . . . . .perform ''Vehicle Communication" TEST 2A.
− If DRB displays
''ABS Bus Communication Failure'' . . . . . . . . . .perform "Vehicle Communication" TEST 5A.
− If DRB displays
''BCM Bus Communication Failure'' . . . . . . . . .perform ''Vehicle Communication'' TEST 4A.
5. With the DRB, select ''Body Computer'', then ''Read DTCs.''
− If the DRB displays ''Fuel Level Sending Unit Failure'' . . . . . . . . . . . . . . .perform TEST 2A.
− If DRB displays ''Dimming Level Switch Failure'' . . . . . . . . . . . . . . . . . . . .perform TEST 3A.
Diagnostics for the instrument cluster are separated into six groups. Verify the failure or the
customer's complaint and make sure the vehicle is experiencing the problem at this time. Choose
the applicable item from the list below and perform the indicated test.
PROBLEM WITH
All Gauges Not Operating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TEST 4A
Any One Gauge Operating Improperly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TEST 5A
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TEST 6A
Any or All Cluster Warning Lamps. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TEST 7A
PRNDL not operating properly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TEST 8A
Cluster and Panel Illumination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TEST 9A
NOTE: If the problem is with the speedometer, tachometer, or temperature gauges intermittently
going to zero or to the lowest point, use the DRB and select ''Monitor Display'', then ''Engine Info''.
While wiggling the wire harness and connectors between the cluster and BCM, if the DRB says ''No
Response'', disconnect the appropriate connectors (refer to the service manual for connector
locations containing the PCI bus circuits) and inspect the terminals for corrosion and for spread or
pushed out terminals.
295
I
N
S
T
R
U
M
E
N
T
C
L
U
S
T
E
R
PERFORM