TEST
ACTION
APPLICABILITY
3
Note: Ensure there is PCI bus communication with other modules. If not,
refer to the PCI Bus Communication Failure symptom and repair as
necessary.
WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNI-
TION OFF, DISCONNECT THE BATTERY AND WAIT TWO MINUTES BE-
FORE PROCEEDING.
Disconnect the Occupant Classification Module harness connector.
Turn the ignition on and then reconnect the Battery.
Use Scope input cable CH7058, Cable to Probe adapter CH7062, and the red and
black test probes.
Connect the scope input cable to the channel one connector on the DRB. Attach the
red and black leads and the cable to probe adapter to the scope input cable.
With the DRBIII
t select Pep Module Tools.
Select lab scope.
Select Live Data.
Select 12 volt square wave.
Press F2 for Scope.
Press F2 and use the down arrow to set voltage range to 20 volts. Press F2 again
when complete.
Connect the Black lead to the chassis ground. Connect the Red lead to the PCI Bus
circuit.
Observe the voltage display on the DRBIII
t Lab Scope.
Does the voltage pulse from 0 to approximately 7.5 volts?
All
Yes
→ Replace the Occupant Classification Module in accordance with
the Service lnformation.
Perform __AIRBAG VERIFICATION TEST - VER 1.
No
→ Repair the PCI Bus circuit for an open.
Perform __AIRBAG VERIFICATION TEST - VER 1.
389
COMMUNICATION
*NO RESPONSE FROM OCCUPANT CLASSIFICATION MODULE —
Continued