U2002

DTC U2002 SPI Data - In Low:

CIRCUIT DESCRIPTION
This code (both current and history) indicates the body control module (BCM) has sensed a short to ground condition on the instrument cluster Serial Peripheral Interface (SPI) data line to the BCM.

CONDITIONS FOR SETTING THE DTC
All of the following conditions must be met:
^ Ignition 0 is active.
^ The serial data line from the IPC to the BCM is shorted to ground for 5 seconds.

ACTION TAKEN WHEN THE DTC SETS
Stores DTC U2002 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 RUN) with no current codes active during the 100 ignition cycles.
^ Use the scan tool.

DIAGNOSTIC AIDS
^ Diagnose DTC U2006 through U2007 before diagnosing this DTC.
^ When the diagnostics direct you to take electrical measurements at the wiring harness junction blocks, refer to Diagrams.
^ 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.

TEST DESCRIPTION
The numbers below refer to the numbers on the diagnostic table.
2. This step determines if the BCM is delivering power to the instrument cluster.
3. This step determines if the body control module (BCM) is reading the serial peripheral interface data input high.
7. This step determines if there is an open in CKT 1322 between the BCM and the instrument cluster.
8. This step determines if there is a short to ground in CKT 1322 between the BCM and the instrument cluster.