6. Test for less then 1 ohm between the front end sensor signal circuit terminal 1 and the SDM terminal.
锟斤拷 If greater than the specified range, test the circuit for an open/high resistance.
7. Test for less then 1 ohm between the front end sensor low reference circuit terminal 2 and the SDM terminal.
锟斤拷 If greater than the specified range, test the circuit for an open/high resistance.
8. If the circuits test normal, replace the appropriate front end sensor.
9. Reconnect all SIR components. Ignition ON, with a scan tool clear and recheck for DTCs.
锟斤拷 If the front end sensor DTC returns and is current, replace the SDM.
Repair Instructions
* Inflatable Restraint Front End Sensor Replacement (See: Restraints and Safety Systems/Air Bag Systems/Impact Sensor/Service and
Repair/Inflatable Restraint Front End Sensor Replacement)
* SIR/SRS Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Wiring Repairs/SIR/SRS Wiring Repairs)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for SDM replacement, setup, and programming
Repair Verification
Ignition ON, use the scan tool to clear the DTCs, then recheck for DTCs.
If DTC B0091 was current, replace the SDM.
B101D
DTC B101D (except HP2 A/C Control Module)
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions)provides an overview of each diagnostic category.
DTC Descriptor
DTC B101D XX
- ECU Hardware
Circuit/System Description
The internal fault detection is handled inside the control module. The symptom byte listed in the DTC Descriptor is for engineering reference only.
No external circuit diagnosis is involved.
Conditions for Running the DTC
The control module runs the program to detect an internal fault when power up is commanded. The only requirements are voltage and ground. This
program runs even if the voltage is out of the valid operating range.
Conditions for Setting the DTC
The control module has detected an internal malfunction.
Action Taken When the DTC Sets
The control module refuses all additional inputs.
Conditions for Clearing the DTC
* A current DTC clears when the malfunction is no longer present.
* A history DTC clears when the control module ignition cycle counter reaches the reset threshold of 50, without a repeat of the malfunction.
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