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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), 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=00000000F or 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 and perform self-test diagnostics for GEM using NGS tester. 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
B1243  GEM (1) Express Window Switch Down Circuit Short To Battery
B1244 GEM (2) Rear Wiper Run Relay Coil Circuit Failure
B1245 GEM (2) Rear Wiper Run Relay Coil Circuit Short To Battery
B1302  GEM (1) Delayed Accessory Relay Coil Circuit Failure
B1304  GEM (1) Delayed Accessory Relay Coil Circuit Short To Battery
B1309 GEM (3) Power Door Lock Circuit Short To Ground
B1312 GEM (4) Headlight Input Short To Battery
B1313 GEM (5) Battery Saver Relay Coil Circuit Failure
B1315 GEM (5) Battery Saver Relay Coil Circuit Short To Battery
B1317 GEM (6) Battery Voltage High
B1318 GEM (6) Battery Voltage Low
B1322 GEM (5) Driver's Door Ajar Circuit Short To Ground
B1323 GEM (7) Door Ajar Light Circuit Failure
B1325 GEM (7) Door Ajar Light Short To Battery
B1330 GEM (5) Right Front Door Ajar Circuit Short To Ground
B1334 GEM (5) Luggage Compartment Ajar Circuit Short To Ground
B1335 GEM (5) Sliding Door Ajar Circuit Failure
B1341 GEM (3) Power Door Unlock Circuit Short To Ground
B1342 GEM (8) ECU Is Defective
B1345 GEM (9) Rear Window Defogger Switch Input Circuit Short To Ground
B1347 GEM (9) Rear Window Defogger Relay Coil Circuit Failure
B1349 GEM (9) Rear Window Defogger Relay Coil Circuit Short To Battery
B1352 GEM (4) 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 Short To Battery
B1371 GEM (5) Illuminated Entry Relay Coil Circuit Failure
B1373 GEM (5) Illuminated Entry Relay Coil Circuit Short To Battery
B1392 GEM (3) Memory Door Lock Relay Coil Circuit Failure
B1394 GEM (3) Memory Door Lock Relay Coil Circuit Short To Battery
B1398  GEM (1) Driver Door One-Touch Window Down RelayCircuit Failure
B1400  GEM (1) Driver Door One-Touch Window Down Relay CoilCircuit Short To Battery
B1404  GEM (1) Driver Door Window Down Circuit Open
B1405  GEM (1) Driver Door Window Down Circuit Short To Battery
B1408  GEM (1) Driver Door Window Up Circuit Short To Battery
B1410  GEM (1) Driver Door Window Motor Circuit Failure
B1426 GEM (7) Seat Belt Light Short To Battery
B1428 GEM (7) Seat Belt Light Circuit Failure
B1431 GEM (2) Wiper Run Relay Coil Circuit Failure
B1432 GEM (2) Wiper Run Relay Coil Circuit Short To Battery
B1434 GEM (2) Wiper HI/LO Speed Relay Coil Circuit Failure
B1436 GEM (2) Wiper HI/LO Speed Relay Coil Circuit Short To Battery
B1438 GEM (2) Wiper Mode Select Switch Circuit Failure
B1441 GEM (2) Wiper Mode Select Switch Short To Ground
B1446 GEM (2) Wiper System Park Sense Circuit Failure
B1448 GEM (2) Wiper System Park Sense Short To Battery
B1450 GEM (2) Wiper/Washer Delay Switch Circuit Failure
B1453 GEM (2) Wiper/Washer Delay Switch Short To Ground
B1456 GEM (2) Low Washer Fluid Light Short To Battery
B1458 GEM (2) Wiper/Washer Pump Motor Relay Coil Circuit Failure
B1460 GEM (2) Wiper/Washer Pump Motor Relay Coil Circuit Short To Battery
B1462 GEM (7) Seat Belt Switch Circuit Failure
B1466 GEM (2) Wiper HIGH/LOW Speed Not Switching
B1467 GEM (2) Wiper Motor Circuit Short To Battery
B1473 GEM (2) Wiper Motor LOW Speed Circuit Failure
B1475  GEM (1) Delayed Accessory Relay Contacts Short To Battery
B1476 GEM (2) Wiper Motor HIGH Speed Circuit Failure
B1501 GEM (11) Left Turn Signal Switch Short To Battery
B1505 GEM (11) Right Turn Signal Switch Short To Battery
B1610 GEM (5) Illuminated Entry Input Short To Ground
B1613 GEM (2) Rear Wiper Mode Switch Circuit Short To Battery
B1629 GEM (2) PRNDL Reverse Input Short To Battery
B1896 GEM (5) Driver's & Passenger's Door Ajar Output Short To Battery
B1982 GEM (12) Driver Door Unlock Relay Coil Circuit Failure
B1983 GEM (12) Driver Door Unlock Relay Coil Short To Battery
C1724 GEM (13) Height Sensor Power Circuit Failure
C1763 GEM (13) Height Sensor High Signal Short To Ground
C1768 GEM (13) Height Sensor Low Signal Short To Ground
C1770 GEM (13) Air Suspension Vent Solenoid Circuit Failure
C1772 GEM (13) Air Suspension Vent Solenoid Short To Battery
C1790 GEM (13) Left Rear Air Spring Solenoid Circuit Failure
C1792 GEM (13) Left Rear Air Spring Solenoid Short To Battery
C1795 GEM (13) Right Rear Air Spring Solenoid Circuit Failure
C1797 GEM (13) Right Rear Air Spring Solenoid Short To Battery
C1813 GEM (13) Air Suspension Vent Requirement Exceeds Maximum Timing
C1818 GEM (13) Air Compressor Requirement Exceeds Maximum Timing
C1830 GEM (13) Air Compressor Relay Coil Circuit Failure
C1832 GEM (13) Air Compressor Relay Coil Short To Battery
C1840 GEM (13) Air Suspension Service Switch Circuit Failure
C1850 GEM (13) Air Suspension Warning Light Circuit Failure
C1852 GEM (13) Air Suspension Warning Light Circuit Short To Battery
P0500 GEM (13) GEM Speed Signal Circuit Failure
(1) Perform appropriate DTC test under DIAGNOSTIC TESTING  .
(2) See WIPER/WASHER SYSTEMS article.
(3) See POWER DOOR LOCKS article.
(4) See appropriate wiring diagram in WARNING SYSTEMS article.
(5) See appropriate wiring diagram in ILLUMINATION/INTERIOR LIGHTS article.
(6) See GENERATORS article in the STARTING & CHARGING SYSTEMS section.
(7) See INSTRUMENT PANELS article.
(8) Clear DTCs. Retrieve DTCs. If DTC B1342 is retrieved, replace GEM and retest system operation.
(9) See REAR WINDOW DEFOGGERS article.
(10) See STEERING COLUMN SWITCHES article.
(11) See appropriate wiring diagram in EXTERIOR LIGHTS article.
(12) See REMOTE KEYLESS ENTRY SYSTEMS article.
(13) See ELECTRONIC article in the SUSPENSION section.
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