B1B70-UP-FRONT LEFT SATELLITE ACCELERATION SENSOR INTERNAL
For a complete wiring diagram, refer to the Wiring Information.
Theory of Operation
Each front sensor is secured with a screw to the back of the front end module carrier on either side of the cooling module and inboard of the headlamp within the engine compartment. Impact sensors perform their own self test using power supplied by the Occupant Restraint Controller (ORC) then communicate this status back to the module. The repair of this fault centers on verifying the integrity of the sensor’s internal circuitry and software validity. If the scan tool shows this DTC has a Stored history of setting then the front left impact sensor is to be replaced.
When Monitored:
With the ignition on, the Front Left Impact Sensor is equipped with on board diagnostics to monitor to sensor's internal circuits. If a problem is identified, the sensor sends the Front Left Impact Sensor Internal message to the Occupant Restraint Controller (ORC).
This DTC will set if the ORC receives an internal DTC from the Front Left Impact Sensor.
Possible Causes
FRONT LEFT IMPACT SENSOR
OCCUPANT RESTRAINT CONTROLLER (ORC)
1.
DETERMINE ACTIVE OR STORED FAULT CODE
NOTE:
If the scan tool shows
this DTC has a Stored history of setting then the front left impact
sensor is to be replaced.
NOTE:
Make sure the battery
is fully charged.
1.
Turn the ignition
on.
2.
Wait one minute,
and read active codes.
Is DTC
B1B70 -Up-Front Left Satellite Acceleration Sensor Internal Active
or shows a setting history in Stored ?
Yes
WARNING:
Turn the ignition off disconnect
the 12-volt battery and wait two minutes before proceeding. Failure
to follow these instructions may result in possible serious or fatal
injury.
NOTE:
Inspect the related
wiring harness for chafed, pierced, pinched, and partially broken
wires. Also, inspect the related connectors for broken, bent, pushed
out, spread, corroded, or contaminated terminals. Repair as necessary.
2.
VERIFY OPERATION
OF THE FRONT LEFT IMPACT SENSOR
WARNING:
Turn the ignition off, disconnect
the 12-volt battery and wait two minutes before proceeding. Failure
to follow these instructions may result in possible serious or fatal
injury.
1.
Replace the Front
Left Impact Sensor in accordance with Service Information.
2.
Reconnect the vehicle
wire harness to the sensor.
3.
Remove any special
tools or jumper wires and reconnect all previously disconnected components
- except the Battery.
WARNING:
Turn the ignition on, then reconnect
the 12-volt battery and wait two minutes before proceeding. Failure
to follow these instructions may result in possible serious or fatal
injury.
4.
Use the scan tool
and erase the stored codes in all airbag system modules.
5.
Turn the Ignition
Off, and wait 15 seconds before turning the Ignition On.
6.
Wait one minute,
and read active codes.
Did
the active DTC B1B70-UP-FRONT LEFT SATELLITE ACCELERATION SENSOR INTERNAL
DTC return?
Yes
WARNING:
Turn the ignition off, disconnect
the 12-volt battery and wait two minutes before proceeding. Failure
to follow these instructions may result in possible serious or fatal
injury.
WARNING:
If the Occupant Restraint Controller
(ORC) is dropped at any time, it must be replaced. Failure to follow
these instructions may result in possible serious or fatal injury.
Replace the ORC in
accordance with Service Information.
With the scan tool,
record and erase all DTC from all Airbag modules.
2.
If any ACTIVE codes
are present they must be resolved before diagnosing any stored codes.
WARNING:
Turn the ignition off, disconnect
the 12-volt battery and wait two minutes before proceeding. Failure
to follow these instructions may result in possible serious or fatal
injury.
3.
Using the wiring
diagram/schematic as a guide, inspect the wiring and connectors.
4.
Look for chafed,
pierced, pinched, or partially broken wires and broken, bent, pushed
out, spread, corroded, or contaminated terminals.
5.
The following additional
checks may assist you in identifying a possible intermittent problem.
6.
Reconnect any disconnected
components and harness connector.
WARNING:
Turn the ignition on, then reconnect
the 12-volt battery and wait two minutes before proceeding. Failure
to follow these instructions may result in possible serious or fatal
injury.
7.
With the scan tool,
monitor active codes as you work through the following steps.
WARNING:
Maintain a safe distance from all
airbags while performing the following steps. Failure to follow these
instructions may result in possible serious or fatal injury.
8.
Wiggle the wiring
harness and connectors of the related airbag circuit or component.
9.
If codes are related
to the Driver Airbag circuits, rotate the steering wheel from stop
to stop.
10.
If only stored
codes return continue the test until the problem area has been isolated.
11.
In the previous
steps you have attempted to recreate the conditions responsible for
setting active DTC in question.
Are
any ACTIVE DTCs present or Is the Impact Sensor showing Stored DTC
status?
Yes
NOTE:
If the scan tool shows
this DTC has a Stored history of setting then the front left impact
sensor is to be replaced.
