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), faulty relays, 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 CKT70=ALL MODULES NO RESPONSE/NOT EQUIPPED, see MODULE COMMUNICATIONS NETWORK article to continue diagnosis. If NGS tester displays NO RESPONSE/NOT EQUIPPED for GEM, go to TEST A: NO COMMUNICATION WITH GEM under SYSTEM TESTING.
If NGS tester displays SYSTEM PASSED, retrieve and record continuous DTCs. Erase continuous DTCs. Using NGS tester, perform self-test diagnostics for GEM. Perform appropriate DTC test in accordance with DTC retrieved. See DIAGNOSTIC TESTING . If DTC test is not listed, see GENERIC ELECTRONIC MODULE (GEM) DTC DEFINITIONS table to continue diagnosis. If no DTCs are retrieved, perform appropriate test under SYSTEM TESTING .

GENERIC ELECTRONIC MODULE (GEM) DTC DEFINITIONS

DTC

Source Module

Description

B1300

GEM

⁽¹⁾ Power Door Lock Ckt Failure

B1302

GEM

⁽²⁾ Delayed Accessory Relay Coil Ckt Failure

B1304

GEM

⁽²⁾ Delayed Accessory Relay Coil Ckt Short To Battery

B1309

GEM

⁽¹⁾⁽³⁾ Power Door Lock Sense Ckt Short To Ground

B1310

GEM

⁽³⁾ Power Door Unlock Ckt Failure

B1314

GEM

⁽⁴⁾ Battery Saver Relay Coil Ckt Open

B1315

GEM

⁽⁴⁾ Battery Saver Relay Coil Ckt Short To Battery

B1316

GEM

⁽⁴⁾ Battery Saver Relay Coil Ckt Short To Ground

B1317

GEM

⁽¹⁾⁽⁵⁾ Battery Voltage High

B1318

GEM

⁽¹⁾⁽⁵⁾ Battery Voltage Low

B1319

GEM

⁽¹⁾⁽⁴⁾ Driver Door Ajar Ckt Failure

B1322

GEM

⁽¹⁾⁽⁴⁾ Driver Door Ajar Ckt Short To Ground

B1323

GEM

⁽⁶⁾ Door Ajar Light Ckt Failure

B1325

GEM

⁽⁶⁾ Door Ajar Light Ckt Short To Battery

B1327

GEM

⁽¹⁾⁽⁴⁾ Passenger Door Ajar Ckt Failure

B1330

GEM

⁽¹⁾⁽⁴⁾ Passenger Door Ajar Ckt Short To Ground

B1331

GEM

⁽¹⁾⁽⁴⁾ Decklid Ajar Rear Door Ckt Failure

B1334

GEM

⁽¹⁾⁽⁴⁾ Decklid Ajar Rear Door Ckt Short To Ground

B1338

GEM

⁽¹⁾⁽⁴⁾ Right Rear Door Ajar Ckt Short To Ground

B1342

GEM

⁽⁷⁾ ECU Failure

B1343

GEM

⁽¹⁾⁽⁸⁾ Heated Backlite Input Ckt Failure

B1345

GEM

⁽¹⁾⁽⁸⁾ Heated Backlite Input Ckt Short To Ground

B1347

GEM

⁽⁸⁾ Heated Backlite Relay Ckt Failure

B1349

GEM

⁽⁸⁾ Heated Backlite Relay Ckt Short To Battery

B1352

GEM

⁽¹⁾⁽⁹⁾ Ignition Key-In Ckt Failure

B1354

GEM

⁽¹⁾⁽⁹⁾ Ignition Key-In Ckt Short To Ground

B1359

GEM

⁽¹⁾⁽¹⁰⁾ Ignition RUN/ACC Ckt Failure

B1361

GEM

⁽¹⁾⁽¹⁰⁾ Ignition RUN/ACC Ckt Short To Battery

B1363

GEM

⁽¹⁾⁽¹⁰⁾ Ignition Start Ckt Failure

B1365

GEM

⁽¹⁾⁽¹⁰⁾ Ignition Start Ckt Short To Battery

B1371

GEM

⁽⁴⁾ Illuminated Entry Relay Ckt Failure

B1373

GEM

⁽⁴⁾ Illuminated Entry Relay Short To Battery

B1397

GEM

⁽³⁾ Power Door Unlock Ckt Short To Battery

B1398

GEM

⁽²⁾ Driver Door Window One-Touch Relay Ckt Failure

B1400

GEM

⁽²⁾ Driver Door Window One-Touch Relay Ckt Short To Battery

B1402

GEM

⁽¹⁾ Driver Door Window Down Switch Ckt Failure

B1403

GEM

⁽¹⁾ Driver Door Window Up Switch Ckt Failure

B1405

GEM

⁽¹⁾⁽²⁾ Driver Door Window Down Ckt Short To Battery

B1408

GEM

⁽¹⁾⁽²⁾ Driver Door Window Up Ckt Short To Battery

B1410

GEM

⁽¹⁾⁽²⁾ Driver Door Window Motor Ckt Failure

B1426

GEM

⁽⁶⁾ Seat Belt Light Ckt Short To Battery

B1428

GEM

⁽⁶⁾ Seat Belt Light Ckt Failure

B1430

GEM

⁽¹⁾⁽⁹⁾ Seat Belt Switch Ckt Short To Ground

B1432

GEM

⁽¹¹⁾ Wiper Brake/Run Relay Ckt Short To Battery

B1433

GEM

⁽¹¹⁾ Wiper Brake/Run Relay Ckt Short To Ground

B1434

GEM

⁽¹¹⁾ Wiper HI/LO Speed Relay Coil Ckt Failure

B1436

GEM

⁽¹¹⁾ Wiper HI/LO Speed Relay Coil Ckt Short To Battery

B1438

GEM

⁽¹⁾⁽¹¹⁾ Wiper Mode Select Switch Ckt Failure

B1441

GEM

⁽¹⁾⁽¹¹⁾ Wiper Mode Select Switch Ckt Short To Ground

B1446

GEM

⁽¹⁾⁽¹¹⁾ Wiper Park Sense Ckt Failure

B1448

GEM

⁽¹⁾⁽¹¹⁾ Wiper Park Sense Ckt Short To Battery

B1450

GEM

⁽¹⁾⁽¹¹⁾ Wiper/Washer Delay Switch Ckt Failure

B1453

GEM

⁽¹⁾⁽¹¹⁾ Wiper/Washer Delay Switch Ckt Short To Ground

B1458

GEM

⁽¹¹⁾ Wiper/Washer Pump Motor Relay Ckt Failure

B1460

GEM

⁽¹¹⁾ Wiper/Washer Pump Motor Relay Coil Ckt Short To Battery

B1462

GEM

⁽¹⁾⁽⁹⁾ Seat Belt Switch Ckt Failure

B1465

GEM

⁽¹¹⁾ Wiper Brake/Run Relay Ckt Open

B1466

GEM

⁽¹¹⁾ Wiper HI/LO Speed Not Switching

B1473

GEM

⁽¹¹⁾ Wiper Motor Low Speed Ckt Failure

B1474

GEM

⁽⁴⁾ Battery Saver Power Relay Ckt Short To Battery

B1475

GEM

⁽²⁾ Delayed Accessory Relay Contact Short To Battery

B1476

GEM

⁽¹¹⁾ Wiper Motor High Speed Ckt Failure

B1555

GEM

⁽¹⁾⁽¹⁰⁾ Ignition RUN/START Ckt Failure

B1557

GEM

⁽¹⁾⁽¹⁰⁾ Ignition RUN/START Ckt Short To Battery

B1571

GEM

⁽¹⁾⁽⁴⁾ Left Rear Door Ajar Ckt Failure

B1574

GEM

⁽¹⁾⁽⁴⁾ Left Rear Door Ajar Ckt Short To Ground

B1575

GEM

⁽¹⁾⁽⁹⁾ Parking Light Input Ckt Failure

B1577

GEM

⁽¹⁾⁽⁹⁾ Parking Light Input Ckt Short To Battery

B1607

GEM

⁽¹⁾⁽⁴⁾ Illuminated Entry Input Ckt Failure

B1610

GEM

⁽¹⁾⁽⁴⁾ Illuminated Entry Input Ckt Short To Ground

B1830

GEM

⁽¹⁾ Door Unlock/Disarm Switch Ckt Failure

B1833

GEM

⁽¹⁾ Door Unlock/Disarm Switch Ckt Short To Ground

B1834

GEM

⁽³⁾ Door Unlock/Disarm Switch Output Ckt Failure

B1836

GEM

⁽³⁾ Door Unlock/Disarm Switch Output Ckt Short To Battery

B1838

GEM

⁽⁴⁾ Battery Saver Power Relay Ckt Failure

B1840

GEM

⁽¹¹⁾ Front Wiper Power Ckt Failure

C1898

GEM

⁽¹⁾⁽¹²⁾ VAPS II Ckt Open

C1899

GEM

⁽¹⁾⁽¹²⁾ VAPS II Ckt Short To Battery

C1928

GEM

⁽¹²⁾ VAPS II Solenoid Actuator Return Ckt Short To Ground

P1881

GEM

⁽⁹⁾ Low Coolant Switch Input Ckt Failure

P1882

GEM

⁽⁹⁾ Engine Coolant Level Switch Ckt Short To Ground

P1883

GEM

⁽⁶⁾ Engine Coolant Level Light Ckt Failure

P1884

GEM

⁽⁶⁾ Engine Coolant Level Light Ckt Short To Battery

⁽¹⁾	This DTC may be present from GEM wiggle test.

⁽²⁾	Perform appropriate DTC test under DIAGNOSTIC TESTING .

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

⁽⁴⁾	See appropriate wiring diagram in ILLUMINATION/INTERIOR LIGHTS article.

⁽⁵⁾	See GENERATORS article in the STARTING & CHARGING SYSTEMS section.

⁽⁶⁾	See INSTRUMENT PANELS article.

⁽⁷⁾	Clear DTCs. Retrieve DTCs. If DTC B1342 is retrieved, replace GEM and retest system operation.

⁽⁸⁾	See REAR WINDOW DEFOGGERS article.

⁽⁹⁾	See appropriate wiring diagram in WARNING SYSTEMS article.

⁽¹⁰⁾	See STEERING COLUMN SWITCHES article.

⁽¹¹⁾	See WIPER/WASHER SYSTEMS article.

⁽¹²⁾	See ELECTRONIC article in the STEERING section.