Preliminary Procedure

Verify customer's complaint by operating power windows. Check window alignment and window mounting. Check for window frame interference or damaged switches. Check for blown fuse(s), loose or corroded connectors, or damaged wiring harness. Repair or replace components as necessary.
If all components are okay, connect NGS tester to DLC located below instrument panel. Using NGS tester, perform DATA LINK DIAGNOSTIC TEST. If NGS tester displays CKT 914 or CKT 915=ALL MODULES NO RESP/NOT EQUIP, see MODULE COMMUNICATIONS NETWORK article to continue diagnosis. If NGS tester displays NO RESPONSE/NOT EQUIPPED for Driver Door Module (DDM), go to TEST A: NO COMMUNICATION WITH DDM under SYSTEM TESTING. If NGS tester displays NO RESPONSE/NOT EQUIPPED for Lighting Control Module (LCM), go to TEST B: NO COMMUNICATION WITH LCM under SYSTEM TESTING.
If DDM is not listed for a communication concern, turn ignition switch to RUN position. Ensure all doors are closed. Using NGS tester, retrieve and record continuous DTCs. Erase continuous DTCs. Perform DDM self-test diagnostics using NGS tester. If DDM exits diagnostic state during self-test and returns to normal operation state, go to TEST A: NO COMMUNICATION WITH DDM under SYSTEM TESTING.
If LCM is not listed for a communication concern, turn ignition switch to RUN position. Using NGS tester, retrieve and record continuous DTCs. Erase continuous DTCs. Perform LCM self-test diagnostics using NGS tester. If LCM exits diagnostic state during self-test and returns to normal operation state, go to TEST B: NO COMMUNICATION WITH LCM under SYSTEM TESTING.
If DDM DTC B1549 is retrieved, go to TEST C: ALL WINDOWS ARE INOPERATIVE under SYSTEM TESTING. If any other DDM DTCs are retrieved, see DRIVER DOOR MODULE (DDM) DTC INDEX table to continue diagnosis. If any other LCM DTCs are retrieved, see LIGHTING CONTROL MODULE (LCM) DTC INDEX table to continue diagnosis. If no DTCs are retrieved, perform appropriate test under SYSTEM TESTING .

DRIVER DOOR MODULE (DDM) DTC INDEX

DTC

Proceed To

B1319 (Left Front Door Ajar Circuit Failure)

⁽¹⁾

B1342 (ECU Defective)

⁽²⁾

B1396 (Door Lock Circuit Short To Battery)

⁽³⁾

B1397 (Door Unlock Circuit Short To Battery)

⁽³⁾

B1525 (Keyless Entry Circuit Short To Battery)

⁽⁴⁾

B1541 (Mirror Driver Switch Assembly Ckt Short To Battery)

⁽⁵⁾

B1545 (Seat Direction Switch Assembly Ckt Short To Battery)

⁽⁶⁾

B1549 (Power Window Master Circuit Short To Battery)

⁽⁷⁾

B1554 (Decklid Release Circuit Short To Ground)

⁽³⁾

B1562 (Door Lock Cylinder Circuit Short To Ground)

⁽³⁾

U1041 (SCP Invalid Or Missing Data For Vehicle Speed)

⁽⁸⁾

U1059 (SCP Invalid Or Missing Data For Transmission Range)

⁽⁹⁾

U1089 (SCP Invalid Or Missing Data For Suspension)

⁽¹⁰⁾

U1181 (SCP Invalid Or Missing Data For Memory Feature)

⁽¹¹⁾

U1262 (SCP Communication Bus Fault)

⁽¹²⁾

⁽¹⁾	See appropriate wiring diagram in ILLUMINATION/INTERIOR LIGHTS article.

⁽²⁾	Replace Driver Door Module (DDM) and retest system operation.

⁽³⁾	See POWER DOOR LOCKS & TRUNK RELEASE article.

⁽⁴⁾	See REMOTE KEYLESS ENTRY SYSTEMS article.

⁽⁵⁾	See POWER MEMORY MIRRORS article.

⁽⁶⁾	See POWER SEATS article.

⁽⁷⁾	Perform TEST C: ALL WINDOWS ARE INOPERATIVE under SYSTEM TESTING.

⁽⁸⁾	DTC caused by ABS system. See BRAKE SYSTEM - ANTI-LOCK article in the BRAKES section.

⁽⁹⁾	DTC caused by powertrain control module. See TESTS W/CODES article in the ENGINE PERFORMANCE section.

⁽¹⁰⁾	DTC caused vehicle dynamic module. See appropriate article in the SUSPENSION section.

⁽¹¹⁾	DTC caused by virtual image electronic instrument cluster. See INSTRUMENT PANELS article.

⁽¹²⁾	Service all other DTCs first. After all other DTC concerns have been repaired, see MODULE COMMUNICATIONS NETWORK article.

LIGHTING CONTROL MODULE (LCM) DTC INDEX

DTC

Proceed To

B1312 (Headlight Input Circuit Short To Battery Voltage)

⁽¹⁾

B1334 (Decklid Ajar Rear Door Circuit Short To Ground)

⁽²⁾

B1352 (Ignition Key-In Circuit Failure)

⁽³⁾

B1359 (Ignition RUN/ACC Circuit Failure)

⁽⁴⁾

B1462 (Seat Belt Switch Circuit Failure)

⁽²⁾

B1483 (Brake Pedal Input Circuit Failure)

⁽¹⁾

B1485 (Brake Pedal Input Short To Battery)

⁽¹⁾

B1498 (Decklid Punch Out Short To Ground)

⁽¹⁾

B1509 (Flash-To-Pass Switch Circuit Short To Battery)

⁽¹⁾

B1522 (Hood Switch Circuit Short To Ground)

⁽⁵⁾

B1555 (Ignition RUN/START Circuit Failure)

⁽⁴⁾

B1566 (Door Ajar Circuit Short To Ground)

⁽¹⁾

B1569 (Headlight High Beam Circuit Short To Battery Voltage)

⁽¹⁾

B1577 (Parking Light Input Circuit Short To Battery Voltage)

⁽¹⁾

B1582 (Dim Panel Increase Input Circuit Short To Ground)

⁽¹⁾

B1586 (Dim Panel Decrease Input Circuit Short To Ground)

⁽¹⁾

B1590 (Autolamp Delay Increase Circuit Short To Battery)

⁽¹⁾

B1594 (Autolamp Delay Decrease Circuit Short To Battery)

⁽¹⁾

B1676 (Battery Voltage Out Of Range)

⁽⁶⁾

B1795 (Headlight Low Beam Circuit Open)

⁽¹⁾

B1807 (Taillight Output Circuit Open)

⁽¹⁾

U1041 (SCP Invalid Or Missing Data For Vehicle Speed)

⁽⁷⁾

U1059 (SCP Invalid Or Missing Data For Transmission Range)

⁽⁸⁾

U1123 (SCP Invalid Or Missing Data For Odometer)

⁽⁷⁾

U1146 (SCP Invalid Or Missing Data For Vehicle Security)

⁽⁹⁾

U1147 (SCP Invalid Or Missing Data For Vehicle Security)

⁽⁹⁾

U1181 (SCP Invalid Or Missing Data For Memory Feature)

⁽¹⁰⁾

U1198 (SCP Invalid Or Missing Data For Doors)

⁽¹¹⁾

U1262 (SCP Communication Bus Fault)

⁽¹²⁾

⁽¹⁾	See AUTOLAMP SYSTEMS article.

⁽²⁾	See INSTRUMENT PANELS article.

⁽³⁾	Test wiring for opens and/or shorts and repair as necessary. See appropriate wiring diagram in WARNING SYSTEMS article.

⁽⁴⁾	See STEERING COLUMN SWITCHES article.

⁽⁵⁾	See ANTI-THEFT SYSTEMS article.

⁽⁶⁾	See GENERATORS article in the STARTING & CHARGING SYSTEMS section.

⁽⁷⁾	DTC caused by ABS system. See BRAKE SYSTEM - ANTI-LOCK article in the BRAKES section.

⁽⁸⁾	DTC caused by powertrain control module. See TESTS W/CODES article in the ENGINE PERFORMANCE section

⁽⁹⁾	Using NGS tester, perform VIC Self-Test.

⁽¹⁰⁾	Using NGS tester, perform DDM Self-Test and VIC Self-Test.

⁽¹¹⁾	Using NGS tester, perform DDM Self-Test.

⁽¹²⁾	Service all other DTCs first. After all other DTC concerns have been repaired, see MODULE COMMUNICATIONS NETWORK article.