2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 292
4. Install a 30A fused jumper wire between relay terminal 85 and 12V. Install a jumper wire between relay terminal 86 and ground. Test for less
than 2 ohms between terminals 30 and 87.
瀚慖f greater than the specified range, replace the relay.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Relay Replacement (Attached to Wire Harness) (See: Power and Ground Distribution/Power Distribution Relay/Service and Repair/Relay
Replacement (Attached to Wire Harness))Relay Replacement (Within an Electrical Center) (See: Power and Ground Distribution/Power
Distribution Relay/Service and Repair/Relay Replacement (Within an Electrical Center))
* Control Module References (See: Testing and Inspection/Programming and Relearning) for HVAC control module replacement, setup and
programming
B302A
DTC B302A
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 B302A 00
- Telematic Requested Immobilization
Circuit/System Description
As part of the vehicle telematics enhanced services, a request may be sent to the theft deterrent module (TDM) to disable vehicle starting. If a valid
message is received by the TDM requesting that starting be disabled, the start enable message will not be sent to the engine control module (ECM).
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
* A current DTC will clear when the telematic start disable request is no longer seen.
* A history DTC will clear after 100 ignition cycles in which the telematic start disable request is not seen.
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 B302A will only set as a history DTC.
Reference Information
Schematic Reference
Immobilizer Schematics (See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Diagrams/Electrical Diagrams/Immobilizer
Schematics)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
Immobilizer Description and Operation (See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Description and
Operation/Immobilizer Description and Operation)
