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Preliminary Procedure

  1. 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.
  2. 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.
  3. 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.