B1BBA-PASSENGER SEAT WEIGHT SENSOR SUPPLY CIRCUIT
For a complete wiring diagram Refer to Section 8W.
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When Monitored:
While the CAN bus ignition status is in IGN_RUN, the module checks the sensor supply.
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Set Condition:
If the OCM detects that the sensor supply shorted.
NOTE:
A shorted supply circuit will cause a 'NO RESPONSE FROM OCM” condition.
Possible Causes
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OCS SUPPLY CIRCUIT SHORTED
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OCCUPANT CLASSIFICATION MODULE (OCM)
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Diagnostic Test
1.
VERIFY THAT B1BBA-PASSENGER SEAT WEIGHT SENSOR SUPPLY CIRCUIT DTC IS ACTIVE
With the scan tool, read OCM DTC.
Does the scan tool display active: B1BBA-PASSENGER SEAT WEIGHT SENSOR SUPPLY CIRCUIT?
Yes
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Replace the OCM in accordance with the Service Information.
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Perform the B1BA7-OCCUPANT CLASSIFICATION SYSTEM VERIFICATION REQUIRED diagnostic test.
No
2.
INSPECT PASSENGER SEAT HARNESS WIRES AND CONNECTORS
WARNING:
To avoid serious or fatal injury, turn the ignition off, disconnect the battery and wait two minutes before proceeding.
Using the wiring diagram/schematic as a guide, inspect the Passenger Seat Harness wiring and connectors. Look for chafed, pierced, pinched, or partially broken wires and broken, bent, pushed
out, spread, corroded, or contaminated terminals.
Are any of these conditions present?
Yes
No
3.
TEST FOR INTERMITTENT CONDITION
With the scan tool, record and erase all DTC from the OCM.
If any ACTIVE codes are present they must be resolved before diagnosing any stored codes.
WARNING:
To avoid serious or fatal injury, turn the ignition off, disconnect the battery and wait two minutes before proceeding.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
Look for chafed, pierced, pinched, or partially broken wires and broken, bent, pushed out, spread, corroded, or contaminated terminals.
The following additional checks may assist you in identifying a possible intermittent problem.
Reconnect any disconnected components and harness connector.
WARNING:
To avoid serious or fatal injury, turn the ignition on, then reconnect the battery.
With the scan tool monitor active codes as you work through the following steps.
WARNING:
To avoid serious or fatal injury, maintain a safe distance from all airbags while performing the following steps.
Wiggle the wiring harness and connectors of the related airbag circuit or component.
If only stored codes return continue the test until the problem area has been isolated.
In the previous steps you have attempted to recreate the conditions responsible for setting active DTC in question.
Are any ACTIVE DTC present?
Yes
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Select the appropriate symptom from Symptom List.
No
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No problem found at this time. Perform the Occupant Classification Module System Verification Test in this Section. Erase all codes before returning vehicle
to customer.