Savana 3500 V8-6.6L DSL Turbo VIN 2 (2006)
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Electronic brake control module (EBCM)
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Instrument panel cluster (IPC)
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Powertrain control module (PCM)
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Radio
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Remote control door lock receiver (RCDLR)
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Sensing and diagnostic module (SDM)
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Vehicle communication interface module (VCIM)
3. The following DTCs may be retrieved with a history status, but are not the cause of the present condition.
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U1300
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U1301
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U1305
6. A state of health DTC with a history status may be present along with a U1000 or U1255 code having a current status. This indicates that the
malfunction occurred when the ignition was ON.
7. Data link connector terminals 2 and 5 provide the connection to the class 2 serial data circuit and the signal ground circuit respectively.
10. A poor connection at the DLC terminal of the splice pack SP200 would cause this condition, but will not set a DTC.
11. An open in the class 2 serial data circuit between the DLC and splice pack SP200 will prevent the scan tool from communicating with any module.
This condition will not set a DTC.
12. The class 2 serial data circuit is shorted to voltage or ground. The condition may be due to the wiring or due to a malfunction in one of the
modules. When testing the wire for a short, make sure there is not a module connected to the wire being tested. This test isolates the BCM class 2
serial data circuits.
14. The BCM detects that the ignition is ON and sends the appropriate power mode message to the other modules. Therefore, the BCM must remain
connected to the DLC for any other module to communicate with the scan tool. This test isolates the rest of the splice pack SP200 serial data
circuits.
18. If there are no current DTCs that begin with a "U", the communication malfunction has been repaired.
19. The communication malfunction may have prevented diagnosis of the customer complaint.
