PRE-RELEASE
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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