Diagnostic System Check

Install scan tool. If scan tool powers up, go to next step. If scan tool does not power up, see SCAN TOOL DOES NOT POWER UP in approprite BODY CONTROL MODULES article.
Turn ignition on, engine off. Try to establish scan tool communication with Driver Door Module (DDM), Dash Integration Module (DIM), Rear Integration Module (RIM) and Remote Function Actuator (RFA) module. If communication with DDM, DIM, RIM and RFA module is established, go to next step. If communication with DDM, DIM, RIM and RFA module is not established, see SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE in appropriate BODY CONTROL MODULES article.
Select display DTC function for DDM, DIM, RIM and RFA module. Record all displayed DTCs, status of displayed DTCs and module that set the DTC. If DTCs are displayed, go to next step. If no DTCs are displayed, see SYMPTOM TESTS .

Retrieve codes and perform appropriate test. See DIAGNOSTIC TROUBLE CODE INDEX table.

DIAGNOSTIC TROUBLE CODE INDEX

DTC

Description

B1000, B1007, B1009, B1010 or B1327

⁽¹⁾

U1161, U1162, U1163 or U1170

⁽²⁾

UXXXX

⁽³⁾

⁽¹⁾	See appropriate BODY CONTROL MODULES article.

⁽²⁾	See DIAGNOSTIC TESTS in POWER WINDOWS - BONNEVILLE & LESABRE article.

⁽³⁾	For any DTC beginning with the letter "U", see SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE in appropriate BODY CONTROL MODULES article.