Preliminary Procedure

Verify customers complaint by operating power window system. Check for obvious signs of mechanical or electrical damage. Check for blown fuse(s), loose or corroded connectors, or damaged wiring harness. Check window glass and regulator drive mechanism. Repair or replace components as necessary. Also see TROUBLE SHOOTING .
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, CKT 915 or CKT 70=ALL MODULES NO RESP/NOT EQUIP, see MODULE COMMUNICATIONS NETWORK article to diagnose network concern. If NGS tester displays NO RESP/NOT EQUIP for Generic Electronic Module (GEM), perform TEST A: NO COMMUNICATION WITH GEM MODULE under SYMPTOM TESTS.
If NGS tester displays SYSTEM PASSED, retrieve and record continuous DTCs. Erase continuous DTCs. Perform self-test diagnostics for GEM using NGS tester. If GEM DTCs are retrieved, see GENERIC ELECTRONIC MODULE (GEM) DTC DEFINITIONS table to continue diagnosis. If no DTCs are retrieved, perform appropriate test under SYMPTOM TESTS .

GENERIC ELECTRONIC MODULE (GEM) DTC DEFINITIONS

DTC

Source Module

Description

B1214

GEM

⁽¹⁾ Running Board Lamp Relay Coil Circuit Failure

B1215

GEM

⁽¹⁾ Running Board Lamp Relay Coil Short To Power

B1240

GEM

⁽²⁾ Rear Washer Pump Relay Coil Circuit Failure

B1241

GEM

⁽²⁾ Rear Washer Pump Relay Coil Short To Battery

B1302

GEM

⁽³⁾ Accessory Delay Relay Coil Circuit Failure

B1304

GEM

⁽³⁾ Accessory Delay Relay Coil Circuit Open Or Short To Battery

B1313

GEM

⁽³⁾ Battery Saver Relay Coil Circuit Failure

B1315

GEM

⁽³⁾ Battery Saver Relay Coil Circuit Short To Battery

B1317

GEM

⁽⁴⁾⁽⁵⁾ Battery Voltage High

B1318

GEM

⁽⁴⁾⁽⁵⁾ Battery Voltage Low

B1322

GEM

⁽¹⁾⁽⁵⁾ Left Front Door Ajar Circuit Short To Ground

B1323

GEM

⁽⁶⁾ Door Ajar Light Circuit Failure

B1325

GEM

⁽⁶⁾ Door Ajar Light Circuit Short To Battery

B1330

GEM

⁽¹⁾⁽⁵⁾ Right Front Door Ajar Circuit Short To Ground

B1334

GEM

⁽¹⁾ Liftgate Ajar Rear Door Circuit Short To Ground

B1338

GEM

⁽¹⁾ Right Rear Door Open Warning Light Switch Circuit Short To Ground

B1342

GEM

⁽⁷⁾ GEM Is Defective

B1345

GEM

⁽⁸⁾ Heated Backlite Input Circuit Short To Ground

B1347

GEM

⁽⁸⁾ Heated Backlite Relay Circuit Failure

B1349

GEM

⁽⁸⁾ Heated Backlite Relay Circuit Short To Battery

B1352

GEM

⁽⁵⁾⁽⁹⁾ Ignition Key-In Circuit Failure

B1355

GEM

⁽¹⁰⁾ Ignition Run Circuit Failure

B1359

GEM

⁽¹⁰⁾ Ignition RUN/ACC Circuit Failure

B1365

GEM

⁽¹⁰⁾ Ignition START Circuit Failure

B1371

GEM

⁽¹⁾ Illuminated Entry Relay Circuit Failure

B1373

GEM

⁽¹⁾ Interior Light Relay Coil Circuit Short To Battery

B1398

GEM

⁽¹¹⁾ Power Window One-Touch Window Relay Circuit Failure

B1400

GEM

⁽¹¹⁾ Power Window One-Touch Window Relay Coil Circuit Short To Battery

B1405

GEM

⁽¹²⁾ Driver Door Power Window Down Circuit Short To Battery

B1408

GEM

⁽¹²⁾ Driver Door Power Window Up Circuit Short To Battery

B1410

GEM

⁽⁵⁾⁽¹²⁾ Driver Door Power Window Motor Circuit Failure

B1426

GEM

⁽⁶⁾ Seat Belt Light Output Circuit Short To Battery

B1428

GEM

⁽⁶⁾ Seat Belt Light Output Circuit Failure

B1431

GEM

⁽²⁾ Wiper Brake/Run Relay Circuit Failure

B1432

GEM

⁽²⁾ Wiper Brake/Run Relay Short To Battery

B1434

GEM

⁽²⁾ Wiper Hi/Low Speed Relay Circuit Failure

B1436

GEM

⁽²⁾ Wiper Hi/Low Speed Relay Circuit Short To Battery

B1438

GEM

⁽²⁾⁽⁵⁾ Wiper Mode Select Switch Circuit Failure

B1441

GEM

⁽²⁾⁽⁵⁾ Wiper Mode Select Switch InputShort To Ground

B1446

GEM

⁽²⁾⁽⁵⁾ Wiper Park Sense Circuit Failure

B1450

GEM

⁽²⁾⁽⁵⁾ Wiper/Wash Interval Delay Switch Input Circuit Failure

B1453

GEM

⁽²⁾⁽⁵⁾ Wiper/Wash Interval Delay Switch Input Short To Ground

B1454

GEM

⁽²⁾ Low Washer Fluid Indicator Output Circuit Short To Ground

B1456

GEM

⁽²⁾ Low Washer Fluid Indicator Output Circuit Short To Battery

B1458

GEM

⁽²⁾ Wiper/Washer Pump Motor Relay Circuit Failure

B1460

GEM

⁽²⁾ Wiper/Washer Pump Motor Relay Coil Short To Battery

B1462

GEM

⁽⁵⁾⁽⁹⁾ Seat Belt Switch Circuit Failure

B1466

GEM

⁽²⁾ Wiper Hi/Low Speed Not Switching

B1467

GEM

⁽²⁾ Wiper Motor Hi/Low Speed Circuit Short To Battery

B1473

GEM

⁽²⁾ Wiper Motor Low Speed Circuit Failure

B1475

GEM

⁽³⁾ Delayed Accessory Relay Contacts Short To Battery

B1476

GEM

⁽²⁾ Wiper Motor High Speed Circuit Failure

B1483

GEM

⁽¹³⁾ Brake Pedal Input Circuit Failure

B1485

GEM

⁽¹³⁾ Brake Pedal Input Circuit Short To Battery

B1571

GEM

⁽¹⁾ Left Rear Door Ajar Circuit Failure

B1574

GEM

⁽¹⁾ Left Rear Door Ajar Circuit Short To Ground

B1577

GEM

⁽⁵⁾⁽⁹⁾ Parking Light Input Circuit Short To Battery

B1610

GEM

⁽¹⁾⁽⁵⁾ Illuminated Entry Input Request Circuit Short To Ground

B1611

GEM

⁽²⁾ Rear Wiper Mode Select Switch Circuit Failure

B1614

GEM

⁽²⁾ Rear Wiper Mode Select Switch Circuit Short To Ground

B1814

GEM

⁽²⁾ Rear Wiper Motor Down Relay Circuit Failure

B1816

GEM

⁽²⁾ Rear Wiper Motor Down Relay Coil Circuit Short To Battery

B1818

GEM

⁽²⁾ Rear Wiper Motor Up Relay Coil Circuit Failure

B1820

GEM

⁽²⁾ Rear Wiper Motor Up Relay Circuit Short To Battery

B1839

GEM

⁽²⁾ Rear Wiper Motor Circuit Failure

B1840

GEM

⁽²⁾ Front Wiper Power Circuit Failure

C1107

GEM

⁽¹⁴⁾ ABS Active Fault

P0500

GEM

⁽¹³⁾ Vehicle Speed Signal Circuit Failure

P1804

GEM

⁽¹³⁾ 4-Wheel Drive High Indicator Circuit Failure

P1806

GEM

⁽¹³⁾ 4-Wheel Drive High Indicator Circuit Short To Battery

P1808

GEM

⁽¹³⁾ 4-Wheel Drive Low Indicator Circuit Failure

P1810

GEM

⁽¹³⁾ 4-Wheel Drive Low Indicator Circuit Short To Battery

P1812

GEM

⁽¹³⁾ 4-Wheel Drive Mode Select Circuit Failure

P1815

GEM

⁽¹³⁾ 4-Wheel Drive Mode Select Circuit Short To Ground

P1819

GEM

⁽¹³⁾ Neutral Safety Switch Input Circuit Failure

P1820

GEM

⁽¹³⁾ Transfer Case Clockwise Shift Relay Coil Circuit Failure

P1822

GEM

⁽¹³⁾ Transfer Case Clockwise Shift Relay Coil Short To Power

P1824

GEM

⁽¹³⁾ 4-Wheel Drive Electric Clutch Relay Circuit Failure

P1826

GEM

⁽¹³⁾ 4-Wheel Drive Low Clutch Relay Short To Battery

P1828

GEM

⁽¹³⁾ Transfer Case Counterclockwise Shift Relay Circuit Failure

P1830

GEM

⁽¹³⁾ Transfer Case Counterclockwise Shift Relay Coil Short To Battery

P1832

GEM

⁽¹³⁾ Front Axle 4WD Solenoid Short To Ground

P1834

GEM

⁽¹³⁾ Front Axle 4WD Solenoid Short To Battery

P1836

GEM

⁽¹³⁾ Transfer Case Front Shaft Speed Sensor Circuit Failure

P1837

GEM

⁽¹³⁾ Transfer Case Rear Shaft Speed Sensor Circuit Failure

P1838

GEM

⁽¹³⁾ Transfer Case Shift Motor Circuit Failure

P1846

GEM

⁽¹³⁾ Transfer Case Contact Plate "A" Circuit Failure

P1850

GEM

⁽¹³⁾ Transfer Case Contact Plate "B" Circuit Failure

P1854

GEM

⁽¹³⁾ Transfer Case Contact Plate "C" Circuit Failure

P1858

GEM

⁽¹³⁾ Transfer Case Contact Plate "D" Circuit Failure

P1866

GEM

⁽¹³⁾ Transfer Case System Concern

P1867

GEM

⁽¹³⁾ Transfer Case Contact Plate General Circuit Failure

P1868

GEM

⁽¹³⁾ Automatic 4WD Indicator Circuit Failure

P1869

GEM

⁽¹³⁾ Automatic 4WD Indicator Circuit Short To Power

P1874

GEM

⁽¹³⁾ Automatic Hall Effect Sensor Power Circuit Failure

P1875

GEM

⁽¹³⁾ Automatic Hall Effect Sensor Power Circuit Short To Battery

P1876

GEM

⁽¹³⁾ Transfer Case 2WD Solenoid Circuit Failure

P1877

GEM

⁽¹³⁾ Transfer Case 2WD Solenoid Circuit Short To Battery

P1886

GEM

⁽¹³⁾ 4X4 Synchronization Failure

P1891

GEM

⁽¹³⁾ Transfer Case Contact Plate Ground Return Open Circuit

⁽¹⁾	Test wiring for opens and/or shorts. Repair as necessary. See appropriate wiring diagram in ILLUMINATION/INTERIOR LIGHTS article.

⁽²⁾	See WIPER/WASHER SYSTEMS article for testing procedures.

⁽³⁾	Perform TEST B: ALL POWER WINDOWS ARE INOPERATIVE under SYSTEM TESTS.

⁽⁴⁾	See GENERATORS article in the STARTING & CHARGING SYSTEMS section for testing procedures.

⁽⁵⁾	This DTC may also be present from GEM wiggle test.

⁽⁶⁾	See INSTRUMENT PANELS article for testing procedures.

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

⁽⁸⁾	See REAR WINDOW DEFOGGERS article for testing procedures.

⁽⁹⁾	Test wiring for opens and/or shorts and repair as necessary. See appropriate wiring diagram in WARNING SYSTEMS article.

⁽¹⁰⁾	Perform appropriate test under SYMPTOM TESTS .

⁽¹¹⁾	Perform TEST D: ONE TOUCH DOWN FEATURE DOES NOT OPERATE under SYMPTOM TESTS.

⁽¹²⁾	Perform TEST C: SINGLE WINDOW IS INOPERATIVE under SYMPTOM TESTS.

⁽¹³⁾	See TRANSFER CASES article in the TRANSMISSIONS section for testing procedures.

⁽¹⁴⁾	See BRAKE SYSTEM - ANTI-LOCK article in the BRAKES section for testing procedures.