Power and Signal DistributionDTC C078A
DTC C078A
Diagnostic Instructions
DTC Descriptor
DTC C078A 39: Tire Pressure Indicator Module
Internal Malfunction
Circuit/System Description
The internal fault detection is handled inside the tyre pressure
indicator module. No external circuit diagnosis is involved.
Conditions for Running the DTC
The module runs the program to detect an internal fault when
power up is commanded. The only requirements are voltage and
ground. This program runs even if the voltage is out of the valid
operating range.
Conditions for Setting the DTC
The module has detected an internal malfunction.
Action Taken When the DTC Sets
The module refuses all additional inputs.
Conditions for Clearing the DTC
| • |
A current DTC clears when the malfunction is no
longer present. |
| • |
A history DTC clears when the module ignition
cycle counter reaches the reset threshold of 50, without a
repeat of the malfunction. |
Diagnostic Aids
| • |
This DTC may be stored as a history DTC without
affecting the operation of the module. |
| • |
If stored only as a history DTC and not retrieved
as a current DTC, do not replace the module. |
| • |
If this DTC is retrieved as both a current and
history DTC, replace the tyre pressure sensor locator module. |
Circuit/System Verification
Verify that DTC C078A 39 is not set.
| ⇒ |
If the DTC is set, replace the K65 Tyre
Pressure Indicator Module. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
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13 General
