Security Indicator Always On or Flashing
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Security Indicator Always On or Flashing
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Circuit/System Description
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The main immobilizer function is performed as an interaction between several modules. The process that determines whether the engine may be engaged or not consists of several steps. When the immobilizer is active the indicator in the dashboard is flashing.
Schematic Reference
Immobilizer Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Immobilizer Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References
for scan tool information
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1.
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Ignition OFF, disconnect the harness connector at the B10B Ambient Light/Sunload Sensor.
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2.
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Test for less than 5 Ω between the ground circuit terminal 6 and ground.
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3.
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If greater than the specified range, test the ground circuit for an open/high resistance.
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4.
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Disconnect the harness connector X1 at the K9 Body Control Module. Test for less than 0.3 V at the signal circuit terminal 1 at the B10B Ambient Light/Sunload Sensor and ground.
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5.
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If greater than the specified range, test the signal circuit for a short to voltage.
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6.
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Test for less than 5 Ω between the signal circuit terminal 1 at the B10B Ambient Light/Sunload Sensor and the signal circuit terminal 21 X1 at the K9 Body Control Module.
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7.
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If greater than the specified range, test the signal circuit for an open/high resistance.
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8.
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If the circuit tests normal, replace the B10B Ambient Light/Sunload Sensor.
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9.
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If all circuits test normal, replace the K9 Body Control Module.
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Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.
Control Module References
for body control module (BCM) replacement, setup, and programming
