DTC B3055
Diagnostic Instructions
DTC Descriptor
DTC B3055 00: No Transponder Modulation or
No Transponder Malfunction
Circuit/System Description
When an ignition key is inserted into the ignition lock cylinder
and the ignition is switched ON, the transponder embedded in the
key is energised by the exciter coils surrounding the ignition lock
cylinder. The transponder transmits a signal to the body control
module (BCM). The BCM then compares this value to a value stored in
memory. If the value is correct, the BCM will send the prerelease
password via the serial data circuit to the engine control module
(ECM). If the learned key code does not match or a transponder
value is not received, the BCM will send the start disable password
to the ECM.
Conditions for Running the DTC
Ignition is in the Accessory or Run position.
Conditions for Setting the DTC
The BCM is unable to measure the ignition key transponder
value.
Action Taken When the DTC Sets
• |
Vehicle starting will be disabled. |
• |
The security indicator in the instrument cluster
will be illuminated. A service message will be displayed in the
driver information centre. |
Conditions for Clearing the DTC
• |
A current DTC will be cleared when the BCM detects
a valid transponder value from the ignition key. |
• |
A history DTC will be cleared after
100 malfunction-free ignition cycles or when a scan tool is
used to clear DTCs. |
Reference Information
Schematic Reference
Immobiliser Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Immobiliser Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
- Verify DTC B2955 is not set.
⇒ |
If the DTC B2955 is set, refer to
DTC B2955 . |
- Inspect all available vehicle keys that they are
correct vehicle keys.
⇒ |
If not a correct vehicle key, replace the
key. |
- While viewing the scan tool instrument panel
Transponder Key Part Number, turn ON the ignition with each of the
available vehicle keys. The parameter should read a Key Part Number
with all available keys.
⇒ |
If only one key results in the parameter reading
no Part Number, replace the appropriate key. |
- If all test normal, replace the K9 Body Control
Module.
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
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