Circuit Description
This is code (both current and history) indicates the body control module (BCM) has sensed a loss of serial peripheral interface (SPI) data from the instrument cluster.
Conditions for Setting the DTC
All of the following conditions must be met:
| • | Ignition 0 is active. |
| • | The serial data transmitted from the instrument panel cluster (IPC) to the BCM is incorrect for 12 seconds. |
Action Taken When the DTC Sets
Stores DTC U2001 in the BCM memory
Conditions for Clearing the DTC
| • | The BCM goes to sleep and reinitializes with the malfunction cleared. |
| • | All the BCM history codes will be cleared after 100 ignition cycles (from OFF to ON) with no current codes active during the 100 ignition cycles. |
| • | Use the scan tool. |
Diagnostic Aids
| • | When the diagnostics direct you to take electrical measurements at the wiring harness junction blocks, refer to Power Distribution for terminal assignments of the wiring harness junction blocks. |
| • | If the DTC is a history DTC, the problem may be intermittent. Perform the above tests while wiggling the wiring and connectors. This may often cause the malfunction to appear. |
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
|
Important: A short to ground will cause an open fuse(s). Before performing this diagnostic procedure, inspect the fuse(s) for an open. | ||||
1 | Was the body control module (BCM) Diagnostic System Check performed? | -- | Go to Step 2 | |
2 | Diagnose and repair DTC U2002 through DTC 2007. Is the repair complete? | -- | Go to Step 5 | Go to Step 3 |
3 | Use the scan tool in order to check if DTC U2001 is current without any DTCs within DTC U2002 through DTC U2007 as current codes. Is U2001 a current DTC without any DTCs within DTC U2002 through 2007 set as current codes? | -- | Go to Step 4 | Go to Step 2 |
4 | Replace the instrument cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console. Is the repair complete? | -- | Go to Step 5 | -- |
5 | Clear the DTCs from the memory. Are the DTCs cleared from the memory? | -- | -- | |
