U2006

DTC U2006 SPI Clock - Out Low:

CIRCUIT DESCRIPTION
This code (both current and history) indicates the Body Control Module (BCM) has sensed a short to the ground/open condition on the instrument cluster Serial Peripheral Interface (SPI) data out line to the BCM.

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

ACTION TAKEN WHEN THE DTC SETS
^ Stores DTC U2006 in the BCM memory
^ The instrument cluster illuminates the following indicators:
- THEFT SYSTEM
- ABS
- SERVICE VEHICLE SOON
- The PRNDL indicator is blank.
- The temperature gauges read zero.
^ Disables the instrument cluster data output

CONDITIONS FOR CLEARING THE DTC
^ The BCM goes to sleep and reinitializes with the malfunction cleared.
^ Use the scan tool.

DIAGNOSTIC AIDS
^ With the ignition switch in the ON position, test for voltage transitions on the SPI data line.
^ 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 body control module (BCM) is malfunctioning.
6. This step determines if there is an open in CKT 1323 between the instrument cluster and the BCM.
7. This step determines if there is a short to ground in CKT 1323 between the instrument cluster and the BCM.