Dodge Ram 2004 Service Manual page 117

NO PCI LOOPBACK —
TEST
1 Turn the ignition on.
NOTE: Ensure the battery is fully charged.
NOTE: For the purpose of this test, the AECM and ORC modules will be
referred to as an ACM.
From the list below, select the appropriate module and DTC type for this diagnostic
trouble code.
DETERMINE ACTIVE OR STORED DTC
ACM - ACTIVE
ACM - STORED
NOTE: When reconnecting airbag system components the Ignition must be
turned off and the Battery must be disconnected.
2 WARNING: TO AVOID PERSONAL INJURY OR DEATH, DISCONNECT THE
BATTERY AND WAIT TWO MINUTES BEFORE PROCEEDING.
WARNING: IF THE AIRBAG CONTROL MODULE IS DROPPED AT ANY
TIME, IT MUST BE REPLACED. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT
AND PERSONAL INJURY OR DEATH.
If there are no possible causes remaining, view repair.
Repair
3 Note: Determine which modules this vehicle is equipped with before begin-
ning.
Note: When attempting to communicate with any of the modules on this
vehicle, the DRB will display 1 of 2 different communication errors: a NO
RESPONSE message or a BUS +/- SIGNALS OPEN message.
Turn the ignition on.
Using the DRB, attempt to communicate with the following control modules:
Airbag Control Module
Occupant Classification Module - If equipped
Front Control Module - If equipped
Instrument Cluster
Occupant Classification module (If equipped)
Was the DRBIII able to communicate with one or more Module(s)?
Yes → Go To 4
→ Go To 9
No
4 Turn the ignition off.
Note: Visually inspect the related wiring harness. Look for any chafed,
pierced, pinched, or partially broken wires.
Note: Visually inspect the related wire harness connectors. Look for broken,
bent, pushed out, or corroded terminals.
Note: If the DRB can not communicate with a single module, refer to the
category list for the related symptom.
Were any problems found?
Yes → Repair wiring harness/connectors as necessary.
→ Go To 5
No
Continued
ACTION
Go To 2
Go To 3
Replace the Airbag Control Module in accordance with Service
Instructions.
Perform __AIRBAG VERIFICATION TEST - VER 1.
Perform __AIRBAG VERIFICATION TEST - VER 1.
103
AIRBAG
APPLICABILITY
All
All
All
All