Body Control System Diagnostic System Check

NOTE: Use this system check as starting point for any BCM complaint. Most malfunctions are caused by faulty wiring, connectors or components. Use of scan tool is recommended. Follow scan tool manufacturer's instructions.

Connect scan tool to Data Link Connector. 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 .
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 .
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.
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.
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.
If scan tool displays DTC B1982, B1983, 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

B1000

RFA, SDM

ECU Malfunction

B1004

IPC

Keep Alive Memory (KAM)

B1007

IPC, MSM, RIM, VTD

EEPROM Write Error

B1009

IPC, MSM, RIM, VTD

EEPROM Checksum Error

B1310 ⁽²⁾

IPM

Ambient Air Temperature Sensor Failure

B1317 ⁽²⁾

IPM

In Car Air Temperature Sensor

B1318 ⁽²⁾

IPM

Left Sun Load Sensor Fault

B1321 ⁽²⁾

DIM

A/C Low Side Temperature Sensor Fault

B1324 ⁽²⁾

DIM

A/C Refrigerant Overpressure

B1327

RIM

Device Power Circuit Low

B1328

RIM

Device Power Circuit High

B1328 ⁽²⁾

IPM

Right Sun Load Sensor Fault

B1330 ⁽²⁾

IPM

Left A/C Discharge Sensor Fault

B1331 ⁽²⁾

IPM

Right A/C Discharge Sensor Fault

B1332 ⁽²⁾

IPM

Left Heater Discharge Sensor Fault

B1333 ⁽²⁾

IPM

Right Heater Discharge Sensor Fault

B1340 ⁽²⁾

IPM

Air Mix Door No. 1 Movement Fault

B1341 ⁽²⁾

IPM

Air Mix Door No. 2 Movement Fault

B1344 ⁽²⁾

IPM

HTR/DEF/A/C Door Movement Fault

B1390

DIM

Device Voltage Reference Input Circuit Malfunction

B1399 ⁽²⁾

IPM

Loss Of KDD Communications

B1652

IPM

Loss Of Keep Alive Memory (KAM)

B1656

DDM, DIM, SCCM

EEPROM Write Error

B1658

DIM, IPM, SCCM

EEPROM Checksum Error

B1805

DIM

Ignition Switch Problem

B1982

DIM, IPM

Device Power Circuit High

B1983

DIM, IPM

Device Power Circuit Low

B2419 ⁽³⁾

IPM

Twilight Photocell Circuit Problem

B2420 ⁽³⁾

IPM

Twilight Delay Pot Failure

B2422 ⁽³⁾

IPM

Interior Light Rheostat Failure

B2510 ⁽⁴⁾

DIM

Steering Wheel Controls HVAC Key Stuck

B2511 ⁽⁴⁾

DIM

Steering Wheel Controls Conv Key Stuck

B2512 ⁽⁴⁾

DIM

Steering Wheel Controls Illegal Values

U1016 ⁽⁵⁾

IPM, RIM

Loss Of Communications With PCM

U1064 ⁽⁵⁾

IPM, RIM

Loss Of Communications With DIM

U1065 ⁽⁵⁾

DIM, RIM

Loss Of Communications With IPM

U1066 ⁽⁵⁾

DIM, IPM

Loss Of Communications With RIM

U1096 ⁽⁵⁾

RIM

Loss Of Communications With IPC

U1160 ⁽⁵⁾

RIM

Loss Of Communications With DDM

U1255 ⁽⁵⁾

DIM, IPM, RIM

Class 2 Data Link Malfunction

U1300 ⁽⁵⁾

DIM, IPM, RIM

Class 2 Short To Ground

U1301 ⁽⁵⁾

DIM, IPM, RIM

Class 2 Short To Battery

⁽¹⁾	Go to appropriate diagnostic and repair procedure under DIAGNOSTIC TESTS unless otherwise noted.

⁽²⁾	Go to appropriate diagnostic procedure in AUTOMATIC A/C-HEATER SYSTEMS - SEVILLE article in AIR CONDITIONING & HEATING.

⁽³⁾	Go to appropriate diagnostic procedure in HEADLIGHTS - AUTOMATIC TWILIGHT SENTINEL - SEVILLE article.

⁽⁴⁾	Go to appropriate diagnostic procedure under DIAGNOSTIC TESTS in STEERING COLUMN SWITCHES - SEVILLE article.

⁽⁵⁾	Go to SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE .