2000 Cadillac DeVille BaseFACTORY OEM SERVICE PROCEDURE

Body Control System Diagnostic System Check

  1. Connect scan tool to Data Link Connector (DLC). See Figure . If scan tool powers up, go to next step. If scan tool does not power up, go to SCAN TOOL DOES NOT POWER UP  .
  2. Turn ignition on. Attempt to establish communication with Dash Integration Module (DIM), Instrument Panel Module (IPM) and Rear Integration Module (RIM). If scan tool communicates with all 3 modules, go to next step. If scan tool does not communicate with all 3 modules, go to SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE  .
  3. Display DTCs function on scan tool for DIM, IPM and RIM. If scan tool displays any DTCs for these modules, go to next step. If scan tool does not display any DTCs for these modules, attempt to diagnose malfunctioning system or device by symptom. Go to appropriate article for malfunctioning system or device.
  4. If scan tool displays any DTCs that begin with "U", go to SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE  . If scan tool does not display any DTCs that begin with "U", go to next step.
  5. If scan tool displays DTC B1000, B1004, B1007, B1009, B1652, B1656, B1658 or B1805, go to BODY CONTROL SYSTEM DIAGNOSTIC TROUBLE CODE IDENTIFICATION  table. If scan tool does not display any DTCs listed, go to next step.
  6. If scan tool displays DTC B1327 or B1328 go to BODY CONTROL SYSTEM DIAGNOSTIC TROUBLE CODE IDENTIFICATION  table. If scan tool does not display any DTCs listed, attempt to diagnose malfunctioning system or device by symptom. Go to appropriate article for malfunctioning system or device.
BODY CONTROL SYSTEM DIAGNOSTIC TROUBLE CODE IDENTIFICATION

DTC (1) Module Description
B0159 (3) IPM Outside Air Temperature Sensor Circuit
B0164 (3) IPM Passenger Compartment Temperature Sensor No. 1
B0174 (3) IPM Outside Air Temperature Sensor No. 1
B0179 (3) IPM Outside Air Temperature Sensor No. 2
B0184 (3) IPM Solar Load Sensor No. 1
B0189 (3) IPM Solar Load Sensor No. 2
B0248 (3) IPM Mode Door Inoperative Error
B0249 (3) IPM Heater/Defrost/A/C Door Inoperative Error
B0268 (3) IPM A/I Door Inoperative Error
B0269 (3) IPM Air Inlet Door Range Error
B0408 (3) IPM Temperature Control No. 1 Circuit Malfunction
B0409 (3) IPM Air Mix Door No. 1 Range Error
B0419 (3) IPM Air Mix Door No. 2 Range Error
B0423 (3) IPM Air Mix Door No. 2 Inoperative Error
B0428 (3) IPM Air Mix Door No. 3 Inoperative Error
B0429 (3) IPM Temperature Control No. 3 Rear Circuit Range/Performance
B0510 (3) IPM RH Panel Discharge Temp Sensor Failure
B0515 (3) IPM RH Heater Discharge Temp Sensor Failure
B0520 (3) IPM Rear Discharge Temp Sensor Failure
B1000 (3) IPM Loss of KDD Main Control Head
B1000  IPM ECU Malfunction
B1004  IPM Keep Alive Memory (KAM)
B1007  DIM, RIM EEPROM Write Error
B1009  DIM, RIM EEPROM Checksum Error
B1013  IPM ROM Checksum Error
B1014  IPM Program ROM Checksum Error
B1327  IPM, DIM, RIM Device Power Circuit Low
B1328  DIM, RIM Device Power Circuit High
B1390  DIM Battery Voltage Sense Failure
B1422  DIM Device Power Moding Malfunction
B1656  N/A EEPROM Write Error
B1658  N/A EEPROM Checksum Error
B2556 (2) IPM Interior Light Rheostat Circuit Range
B2641 (2) IPM Delayed Exterior Lighting Control Circuit Range
B2646 (2) IPM Ambient Light Sensor Circuit Range
B2805 (4) IPM Steering Wheel Controls HVAC Switch Circuit Malfunction
B2810 (4) IPM Steering Wheel Controls Entertainment Circuit Malfunction
C0625 (5) RIM Level Control Suspension Sensor Malfunction
C0628 (5) RIM Level Control Position Sensor Circuit High
C0655 (5) RIM Level Control Compressor Relay Malfunction
C0658 (5) RIM Level Control Compressor Relay High
C0660 (5) RIM Level Control Exhaust Valve Circuit Malfunction
C0663 (5) RIM Level Control Exhaust Valve Circuit High
P1531 (6) DIM A/C Temperature Circuit Malfunction
P1536 (6) DIM Engine Coolant Overtemperature
P1540 (6) DIM Air Conditioning Refrigerant Overpressure
U1000 (7) DIM, IPM, RIM Loss Of Communications
U1016 (7) DIM, IPM, RIM Loss Of Communications With PCM
U1064 (7) IPM, RIM Loss Of Communications With DIM
U1065 (7) DIM, RIM Loss Of Communications With IPM
U1066 (7) IPM Loss Of Communications With RIM
U1160 (7) RIM Loss Of Communications With DDM
U1161 (7) RIM Loss Of Communications With PDM
U1162 (7) RIM Loss Of Communications With LRDM
U1163 (7) RIM Loss Of Communications With RRDM
U1164 (7) DIM, RIM Loss Of Communications With DDS
U1300 (7) DIM, IPM, RIM Class 2 Short To Ground
U1301 (7) DIM, IPM, RIM Class 2 Short To Battery
(1) Go to appropriate diagnostic and repair procedure under DIAGNOSTIC TESTS  .
(2) Go to appropriate diagnostic procedure under DIAGNOSTIC TESTS in AUTOMATIC TWILIGHT SENTINEL - DEVILLE article.
(3) Go to appropriate diagnostic procedure in AUTOMATIC A/C-HEATER SYSTEMS - SEVILLE article in AIR CONDITIONING & HEATING.
(4) Go to appropriate diagnostic procedure under DIAGNOSTIC TESTS in STEERING COLUMN SWITCHES - DEVILLE article.
(5) Go to appropriate article in SUSPENSION.
(6) Go to appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
(7) Go to SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE  .
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.