Chrysler Town, Dodge Caravan. Manual — part 857
Symptom:
*ANY PCI BUS INDICATOR INOPERATIVE
POSSIBLE CAUSES
NO RESPONSE - PCI BUS
NO RESPONSE - INSTRUMENT CLUSTER
NO RESPONSE - ECM / PCM
INDICATOR INOPERATIVE
INSTRUMENT CLUSTER
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, select J1850 Module Scan.
Does the DRBIII
t display MIC PRESENT on the BUS?
All
Yes
→ Go To 2
No
→ Refer to the COMMUNICATION category and perform the appro-
priate symptom.
Perform BODY VERIFICATION TEST - VER 1.
2
Turn the ignition on.
With the DRBIII
t, Select Body, MIC, the MODULE DISPLAY.
Does the DRBIII
t display NO RESPONSE from MIC?
All
Yes
→ Refer to the symptom list for problems related to *NO RE-
SPONSE FROM THE INSTRUMENT CLUSTER.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 3
3
Turn the ignition on.
With the DRBIII
t, select Body, MIC, SYSTEM TESTS, PCM MONITOR.
Does the DRBIII
t display PCM INACTIVE on the BUS?
All
Yes
→ Refer to the symptom list for problems related to *NO RE-
SPONSE FROM THE POWERTRAIN CONTROL MODULE
(Gas) / or *NO RESPONSE FROM THE ENGINE CONTROL
MODULE (Diesel)
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 4
4
NOTE: Diagnose and repair any PCM (gas) or ECM (diesel) DTCs before
proceeding with this test.
Perform the Instrument Cluster diagnostic Self Test.
Observe the indicator in question during the Self Test.
Did the indicator illuminate?
All
Yes
→ Refer to the appropriate Servic Information category to diagnose
the related system.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Instrument Cluster in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
664
INSTRUMENT CLUSTER
Symptom:
*SEAT BELT INDICATOR ALWAYS ON
POSSIBLE CAUSES
ACM SEAT BELT INDICATOR COMMAND PRESENT
INSTRUMENT CLUSTER
TEST
ACTION
APPLICABILITY
1
NOTE: Ensure that the Driver seat belt buckle is not damaged and is
buckled.
With the DRBIII
t, select Airbag, then Monitors.
Does the DRBIII
t display 9S Belt Lamp On by ACM9?
All
Yes
→ Refer to Airbag for the related symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Instrument Cluster in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
665
INSTRUMENT CLUSTER
Symptom:
DOOR/LIFTGATE LAMP OUTPUT SHORT
POSSIBLE CAUSES
INTERMITTENT CONDITION
COURTESY LAMPS DRIVER - LIFTGATE CIRCUIT SHORT TO GROUND
COURTESY LAMPS DRIVER - DOOR CIRCUIT SHORT TO GROUND
BODY CONTROL MODULE
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, clear all BCM DTC’s.
With the DRBIII
t, read the DTC information.
Does the DRBIII
t read: Door/Liftgate Lamp Output Short?
All
Yes
→ Go To 2
No
→ The condition that caused the symptom is currently not present.
Inspect the related wiring for a possible intermittent condition.
Look for any chafed, pierced, pinched, or partially broken wires.
Perform BODY VERIFICATION TEST - VER 1.
2
Turn the ignition off.
Disconnect the Liftgate Door Harness.
Open the Liftgate.
Measure the resistance of the Liftgate Output circuit.
Is the resistance below 5.0 ohms?
All
Yes
→ Repair the Courtesy Lamps Driver - Liftgate Circuit for a short
condition.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 3
3
Disconnect the BCM C3 harness connector.
Disconnect the Drivers and Front Passenger door harness connectors one at a time.
Measure the resistance of each Door Lamp Driver circuit to ground.
Is the resistance below 5.0 ohms?
All
Yes
→ Replace the Body Control Module.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Repair the Applicable Courtesy Lamps Driver - Door Circuit for a
short to ground.
Perform BODY VERIFICATION TEST - VER 1.
666
INTERIOR LIGHTING
Symptom:
FRONT COURTESY LAMPS OUTPUT SHORT
When Monitored and Set Condition:
FRONT COURTESY LAMPS OUTPUT SHORT
When Monitored:
Anytime the BCM is active.
Set Condition:
When the voltage of the Headlamp Switch MUX Return circuit falls below
5.0 volts for 10 seconds.
POSSIBLE CAUSES
INTERMITTENT CONDITION
FRONT COURTESY LAMP OUTPUT CIRCUIT SHORT
BODY CONTROL MODULE
OVERHEAD CONSOLE
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, clear all BCM DTC’s.
Turn the courtesy lamps on.
With the DRBIII
t, read the DTC information.
Does the DRBIII
t read: Front Courtesy Lamps Output Short?
All
Yes
→ Go To 2
No
→ The condition that caused the symptom is currently not present.
Inspect the related wiring for a possible intermittent condition.
Look for any chafed, pierced, pinched, or partially broken wires.
Perform BODY VERIFICATION TEST - VER 1.
2
Turn the ignition off.
Disconnect the Headlamp Switch harness connector.
Disconnect the Body Control Module C5 harness connector.
Measure the resistance of the Front Courtesy Lamp Output circuit.
Is the resistance below 5.0 ohms?
All
Yes
→ Repair the Front Courtesy Lamp Output circuit for a short
condition.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 3
3
Turn the ignition off.
Disconnect the Body Control Module C2 harness connector.
Measure the resistance of the Front Courtesy Lamp Output circuit.
Is the resistance below 5.0 ohms?
All
Yes
→ Replace the Overhead Console.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Body Control Module.
Perform BODY VERIFICATION TEST - VER 1.
667
INTERIOR LIGHTING
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