Diagnostic Fault Information

WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

DTC U1500, U1511, U1512, or U1513

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

Linear Interconnect Network Bus 1

U 1500 02

U 1511/U1512⁽¹⁾

U 1500 01

Linear Interconnect Network Bus 2

U 1500 02

U 1512/U1512⁽¹⁾

U 1500 01

Battery Positive Voltage (front window motor)

U1511⁽²⁾

U1511

Battery Positive Voltage (rear window motor)

U1512⁽²⁾

U1512

Ground (front window motor)

U1511

Ground (rear window motor)

U1512

⁽¹⁾	An open between a door module and the splice will cause both DTCs, and an open between the splice and the window motor will cause only 1 DTC.

⁽²⁾	A short to ground on B+ to any window motor will cause all windows to be inoperative due the use of a single circuit breaker for all window motors. DTC U1511 and U1512 will be set in both the driver and passenger door modules.