Preliminary Procedure: Electrical

Blown Fuse(s): - Relays - Turn - Hazard - High/Low Left Headlights - High/Low Right Headlights
Damaged Miniature Bulbs
Damaged Wiring Harness
Loose Or Corroded Connections
Damaged Instrument Cluster

Verify charging system, cooling system, fuel system, safety belt warning chime, turn signals, headlights and theft control are working properly. Inspect wiring harness for obvious signs of shorts, opens, bad connections or damage.

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 ECUS NO RESP/NOT EQUIP, see MODULE COMMUNICATIONS NETWORK article to diagnosis network concern. If NGS tester displays NO RESP/NOT EQUIP for Generic Electronic Module (GEM), go to NO COMMUNICATION WITH GEM under SYMPTOM TESTS.

If NGS tester displays SYSTEM PASSED for GEM, retrieve and record continuous DTCs using NGS tester. Erase continuous DTCs. Perform GEM/CTM self-test diagnostics using NGS tester. If any GEM/CTM DTCs are retrieved, see GENERIC ELECTRONIC MODULE/CENTRAL TIMER MODULE (GEM/CTM) DTC DEFINITIONS table to continue diagnosis. If no DTCs are retrieved, perform appropriate test under SYMPTOM TESTS.

GENERIC ELECTRONIC MODULE/CENTRAL TIMER MODULE (GEM/CTM) DTC

DTC

Source Module

Description

B1302

GEM

⁽¹⁾ Accessory Delay Relay Coil Circuit Failure

B1304

GEM

⁽¹⁾ Accessory Delay Relay Coil Circuit Short To Battery

B1313

GEM/CTM

⁽²⁾ Battery Saver Relay Coil Circuit Failure

B1315

GEM/CTM

⁽²⁾ Battery Saver Relay Coil Circuit Short To Battery

B1317

GEM/CTM

⁽³⁾⁽⁴⁾ Battery Voltage High

B1318

GEM/CTM

⁽³⁾⁽⁴⁾ Battery Voltage Low

B1322

GEM/CTM

⁽²⁾⁽⁴⁾ Driver Door Ajar Circuit Short To Ground

B1323

GEM/CTM

⁽⁵⁾ Driver Door Ajar Light Circuit Failure

B1325

GEM/CTM

⁽⁵⁾ Door Ajar Light Circuit Short To Battery

B1330

GEM/CTM

⁽²⁾⁽⁴⁾ Passenger Door Ajar Circuit Short To Ground

B1340

GEM/CTM

⁽⁶⁾ Chime Input Request Circuit Short To Ground

B1342

GEM/CTM

⁽⁷⁾ GEM/CTM Is Defective

B1352

GEM/CTM

⁽⁶⁾⁽⁴⁾ Ignition Key-In Circuit Failure

B1355

GEM/CTM

⁽⁸⁾ Ignition RUN Circuit Failure

B1359

GEM/CTM

⁽⁸⁾ Ignition RUN/ACC Circuit Failure

B1371

GEM/CTM

⁽²⁾ Illuminated Entry Relay Circuit Failure

B1373

GEM/CTM

⁽²⁾ Illuminated Entry Relay Short To Battery

B1398

GEM

⁽¹⁾ Driver Door One-Touch Window Relay Circuit Failure

B1400

GEM

⁽¹⁾ Driver Door One-Touch Window Relay Coil Circuit Short To Battery

B1404

GEM

⁽¹⁾ Driver Door Window Down Switch Input Circuit Open

B1405

GEM

⁽¹⁾ Driver Door Window Down Switch Input Circuit Short To Battery

B1410

GEM

⁽¹⁾⁽⁴⁾ Driver Door Window Motor Circuit Failure

B1426

GEM/CTM

⁽⁹⁾ Seat Belt Light Circuit Short To Battery

B1428

GEM/CTM

⁽⁹⁾ Seat Belt Light Circuit Failure

B1431

GEM/CTM

⁽¹⁰⁾ Wiper Brake/Run Relay Circuit Failure

B1432

GEM/CTM

⁽¹⁰⁾ Wiper Brake/Run Relay Circuit Short To Battery

B1434

GEM/CTM

⁽¹⁰⁾ Wiper High/Low Speed Relay Circuit Failure

B1436

GEM/CTM

⁽¹⁰⁾ Wiper High/Low Speed Relay Circuit Short To Battery

B1438

GEM/CTM

⁽¹⁰⁾⁽⁴⁾ Wiper Mode Select Switch Circuit Failure

B1441

GEM/CTM

⁽¹⁰⁾⁽⁴⁾ Wiper Mode Select Switch Short To Ground

B1446

GEM/CTM

⁽¹⁰⁾⁽⁴⁾ Wiper Park Sense Circuit Failure

B1450

GEM/CTM

⁽¹⁰⁾⁽⁴⁾ Wiper/Wash Interval Delay Switch Input Failure

B1453

GEM/CTM

⁽¹⁰⁾⁽⁴⁾ Wiper/Wash Interval Delay Switch Input Short To Ground

B1458

GEM/CTM

⁽¹⁰⁾ Wiper/Washer Pump Motor Relay Circuit Failure

B1460

GEM/CTM

⁽¹⁰⁾ Wiper/Washer Pump Motor Relay Coil Short To Battery

B1462

GEM/CTM

⁽⁶⁾⁽⁴⁾ Seat Belt Switch Circuit Failure

B1466

GEM/CTM

⁽¹⁰⁾ Wiper High/Low Speed Not Switching

B1467

GEM/CTM

⁽¹⁰⁾ Wiper Motor Hi/Low Speed Circuit Short To Battery

B1473

GEM/CTM

⁽¹⁰⁾ Wiper Motor Low Speed Circuit Failure

B1475

GEM

⁽¹⁾ Delayed Accessory Relay Contacts Short To Battery

B1476

GEM/CTM

⁽¹⁰⁾ Wiper Motor High Speed Circuit Failure

B1483

GEM

⁽¹¹⁾ Brake Pedal Input Circuit Failure

B1485

GEM

⁽¹¹⁾ Brake Pedal Input Circuit Short To Battery

B1577

GEM/CTM

⁽⁶⁾⁽⁴⁾ Parking Light Input Circuit Short To Battery

B1610

GEM/CTM

⁽²⁾⁽⁴⁾ Illuminated Entry Input Circuit Short To Ground

B1833

GEM

⁽¹²⁾ Door Unlock Switch Circuit Short To Ground

B1840

GEM/CTM

⁽¹⁰⁾ Wiper Power Circuit Failure

B2141

GEM/CTM

⁽¹³⁾ NVM Configuration Failure

C1751

GEM/CTM

⁽¹⁴⁾ VSS Output Short To Battery

C1752

GEM/CTM

⁽¹⁴⁾ VSS Output Short To Ground

P0500

GEM

⁽¹¹⁾ Vehicle Speed Signal Circuit Failure

P1804

GEM

⁽¹⁵⁾ 4WD High Indicator Circuit Failure

P1806

GEM

⁽¹⁵⁾ 4WD High Indicator Circuit Short To Battery

P1808

GEM

⁽¹⁵⁾ 4WD Low Indicator Circuit Failure

P1810

GEM

⁽¹⁵⁾ 4WD Low Indicator Circuit Short To Battery

P1812

GEM

⁽¹¹⁾ 4WD Mode Select Switch Circuit Failure

P1815

GEM

⁽¹¹⁾ 4WD Mode Select Switch Circuit Short To Ground

P1820

GEM

⁽¹¹⁾ Transfer Case Clockwise Shift Relay Coil Circuit Failure

P1822

GEM

⁽¹¹⁾ Transfer Case Clockwise Shift Relay Coil Short To Battery

P1824

GEM

⁽¹¹⁾ 4WD Electric Clutch Relay Circuit Failure

P1826

GEM

⁽¹¹⁾ 4WD Low Clutch Relay Circuit Short To Battery

P1828

GEM

⁽¹¹⁾ Transfer Case Counterclockwise Shift Relay Coil Circuit Failure

P1830

GEM

⁽¹¹⁾ Transfer Case Counterclockwise Shift Relay Coil Short To Battery

P1832

GEM

⁽¹¹⁾ Transfer Case Differential Lock-Up Solenoid Failure

P1833

GEM

⁽¹¹⁾ Transfer Case Differential Lock-Up Solenoid Open Circuit

P1834

GEM

⁽¹¹⁾ Transfer Case Differential Lock-Up Solenoid Short To Battery

P1835

GEM

⁽¹¹⁾ Transfer Case Differential Lock-Up Solenoid Short To Ground

P1838

GEM

⁽¹¹⁾ Transfer Case Shift Motor Circuit Failure

P1846

GEM

⁽¹¹⁾ Transfer Case Contact Plate "A" Circuit Failure

P1850

GEM

⁽¹¹⁾ Transfer Case Contact Plate "B" Circuit Failure

P1854

GEM

⁽¹¹⁾ Transfer Case Contact Plate "C" Circuit Failure

P1858

GEM

⁽¹¹⁾ Transfer Case Contact Plate "D" Circuit Failure

P1863

GEM

⁽¹¹⁾ Transfer Case Contact Plate Power Circuit Open

P1866

GEM

⁽¹¹⁾ Transfer Case System Concern

P1867

GEM

⁽¹¹⁾ Transfer Case Contact Plate General Circuit Failure

P1878

GEM

⁽¹¹⁾ Transfer Case Disengage Solenoid Circuit Failure

P1879

GEM

⁽¹¹⁾ Transfer Case Disengage Solenoid Open Circuit

P1880

GEM

⁽¹¹⁾ Transfer Case Disengage Solenoid Short To Battery

P1885

GEM

⁽¹¹⁾ Transfer Case Disengage Solenoid Short To Ground

P1891

GEM

⁽¹¹⁾ Transfer Case Contact Plate Ground Return Circuit Open

⁽¹⁾	See POWER WINDOWS article for testing procedures.

⁽²⁾	Test wiring for opens and/or shorts and repair as necessary. See appropriate ILLUMINATION/INTERIOR LIGHTS wiring diagram in SYSTEM WIRING DIAGRAMS article in the WIRING DIAGRAMS section.

⁽³⁾	See appropriate GENERATOR article in the ELECTRICAL section for testing procedures.

⁽⁴⁾	This DTC may also be present from GEM/CTM wiggle test.

⁽⁵⁾	See DOOR AJAR INDICATOR INOPERATIVE under SYMPTOM TESTS for testing procedures.

⁽⁶⁾	Test wiring for opens and/or shorts and repair as necessary. See appropriate WARNING SYSTEMS wiring diagram in SYSTEM WIRING DIAGRAMS article in the WIRING DIAGRAMS section.

⁽⁷⁾	Using NGS tester, clear DTCs. Retrieve DTCs. If DTC B1342 is retrieved, replace GEM/CTM and retest system operation.

⁽⁸⁾	See STEERING COLUMN SWITCHES for testing procedures.

⁽⁹⁾	See SEAT BELT WARNING INDICATOR INOPERATIVE under SYMPTOM TESTS for testing procedures.

⁽¹⁰⁾	See WIPER/WASHER SYSTEM article for testing procedures.

⁽¹¹⁾	See appropriate TRANSFER CASE DIAGNOSIS article in the TRANSFER CASES section for testing procedures.

⁽¹²⁾	See REMOTE KEYLESS ENTRY SYSTEM article for testing procedures.

⁽¹³⁾	Vehicle speed calibration data is not programmed into GEM/CTM. Use NGS tester configuration card help screen to program tire size and axle ratio. Retest system operation. If DTC B2141 is still present, replace GEM/CTM and retest system operation.

⁽¹⁴⁾	See SPEEDOMETER/ODOMETER INOPERATIVE (WITH REAR ANTI-LOCK BRAKES) under SYMPTOM TESTS for testing procedures.

⁽¹⁵⁾	See 4WD HIGH, 4WD LOW INDICATOR INOPERATIVE under SYMPTOM TESTS for testing procedures.