DTC B302A
DTC B302A |
Diagnostic Instructions |
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Perform the
Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
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Review
Strategy Based Diagnosis
for an overview of the diagnostic approach.
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Diagnostic Procedure Instructions
provides an overview of each diagnostic category.
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DTC Descriptor |
DTC B302A 00
Mobile Telephone Communications Interface Requested Immobilization Malfunction
Circuit/System Description |
As part of the vehicle telematics enhanced services, a request may be sent to the body control module (BCM) to disable vehicle starting. If a valid message is received by the BCM requesting that starting be disabled, the start enable message will not be sent to the engine control module (ECM).
Conditions for Running the DTC |
The BCM continuously monitors for this DTC.
Conditions for Setting the DTC |
A valid start disable from telematics will set DTC B302A only as a history DTC.
Action Taken When the DTC Sets |
Vehicle starting will be suspended and the security indicator will be illuminated.
Conditions for Clearing the DTC |
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A current DTC will clear when the telematic start disable request is no longer seen.
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A history DTC will clear after 100 ignition cycles in which the telematic start disable request is not seen.
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Diagnostic Aids |
DTC B302A is only an indicator that a start disable request has been received from the vehicle telematics system and does not indicate a fault in the immobilizer system. DTC will only set as a history.
Reference Information |
Schematic Reference
Immobilizer Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Immobilizer Description and Operation
Electrical Information Reference
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Circuit Testing
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Connector Repairs
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Testing for Intermittent Conditions and Poor Connections
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Wiring Repairs
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Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification |
1. |
With a master vehicle key, turn the ignition ON.
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2. |
Observe the security indicator. After approximately 10 minutes, the indicator will turn off.
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3. |
Turn the ignition OFF and wait 5 s.
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4. |
Repeat steps 2-4 two more times for a total of 3 cycles or 30 minutes.
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5. |
With a master vehicle key, turn the ignition ON. The start disable will now be cleared.
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6. |
Using the Red Emergency Button, notify the advisor that the Ignition Block on the vehicle has been cleared and to update the account status.
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