For 1990-2009 cars only
Circuit Description
The BCM sends a state of health message to all the vehicle systems connected to the Class II serial data link.
Conditions for Setting the DTC
The BCM does not receive its own transmitted messages on the Class II serial data link.
Action Taken When the DTC Sets
The BCM stores DTC U1064 in memory.
Conditions for Clearing the DTC
| • | The BCM monitors its own transmitted messages on the Class II serial data link. |
| • | A history DTC will clear after 100 consecutive ignition cycles if the condition for the fault is no longer present. |
| • | Using a scan tool. |
Diagnostic Aids
| • | An internal BCM problem may cause an intermittent malfunction to occur. |
| • | DTC P1626 will set in the Powertrain Control Module (PCM) when the ignition switch is on with the Body Control Module (BCM) disconnected. When BCM diagnostics and repairs are completed, refer to Powertrain Control Module Diagnosis Engine Controls for additional information on PCM related DTCs. |
Test Description
The number below refers to the step number on the diagnostic table.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the BCM diagnostic system check performed? | -- | ||
Is BCM DTC U1064 reset as a current DTC? | -- | |||
3 |
Is the repair complete? | -- | -- | |
4 | The malfunction is not present at this time. Refer to Diagnostic Aids for additional information regarding this DTC. | -- | -- | -- |
5 |
Are there any BCM current DTCs set? | -- | System OK |
