BCM Diagnostic System Check

Connect scan tool to Data Link Connector (DLC). If scan tool does not power up, go to SCAN TOOL DOES NOT POWER UP . If scan tool powers up, go to next step.
Turn ignition on. Attempt to establish communication with BCM. If scan tool communicates with BCM, go to next step. If scan tool does not communicate with BCM, go to SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE .
Select BCM Display DTCs function on scan tool. If scan tool displays any DTCs, go to next step. If scan tool does not display any DTCs, diagnose system by symptom. See appropriate article for malfunctioning system.
If scan tool displays any DTCs beginning with a "U", go to SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE . If scan tool does not display any DTCs beginning with a "U", perform appropriate test. See BODY CONTROL SYSTEM DIAGNOSTIC TROUBLE CODE INDEX table.

BODY CONTROL SYSTEM DIAGNOSTIC TROUBLE CODE INDEX

DTC

Description

B0016 ⁽¹⁾

Right Front/Passenger Frontal Deployment Loop (Single Stage Or Stage 1) Resistance Low

B0017 ⁽¹⁾

Right Front/Passenger Frontal Deployment Loop (Single Stage Or Stage 1) Open

B0018 ⁽¹⁾

Right Front/Passenger Frontal Deployment Loop (Single Stage Or Stage 1) Short To Ground/Voltage Out Of Range

B0022 ⁽¹⁾

Left Front/Driver Frontal Deployment Loop (Single Stage Or Stage 1) Resistance Low

B0024 ⁽¹⁾

Left Front/Driver Frontal Deployment Loop (Single Stage Or Stage 1) Short To Ground/Voltage Out Of Range

B0026 ⁽¹⁾

Left Front/Driver Frontal Deployment Loop (Single Stage Or Stage 1) Open

B0028 ⁽¹⁾

Right Front/Passenger Side Deployment Loop Resistance Low

B0029 ⁽¹⁾

Right Front/Passenger Side Deployment Loop Open

B0030 ⁽¹⁾

Right Front/Passenger Side Deployment Loop Short To Ground/Voltage Out Of Range

B0035 ⁽¹⁾

ADS Closed/Shorted To Ground

B0036 ⁽¹⁾

ADS Open/Missing/Shorted To Battery

B0040 ⁽¹⁾

Left Front/Driver Side Deployment Loop Resistance Low

B0041 ⁽¹⁾

Left Front/Driver Side Deployment Loop Open

B0045 ⁽¹⁾

Left Front Side Deploy Loop Short To Ground/Voltage Out Of Range

B0051 ⁽¹⁾

Deployment Commanded

B0053 ⁽¹⁾

Deployment Commanded With Loop Malfunctions Present

B0077 ⁽¹⁾

Left Front/Driver SIS Malfunction

B0078 ⁽¹⁾

Right Front/Passenger SIS Malfunction

B0079 ⁽¹⁾

Incorrect Left Front/Driver SIS Installed

B0080 ⁽¹⁾

Discard Left Front/Driver SIS

B0081 ⁽¹⁾

Incorrect Right Front/Passenger SIS Installed

B0082 ⁽¹⁾

Discard Right Front/Passenger SIS

B0090 ⁽¹⁾

Active Switch: Voltage Out of Range

B0091 ⁽¹⁾

Active Switch: Wrong State

B0159 ⁽³⁾

Outside Air Temperature Sensor Circuit Range/Performance

B0164 ⁽³⁾

Passenger Compartment Temperature Sensor No. 1 (Single Sensor or Left Side) Circuit Range/Performance

B0174 ⁽³⁾

Output Air Temperature Sensor No. 1 (Upper, Single or Left Side) Circuit Range/Performance

B0179 ⁽³⁾

Output Air Temperature Sensor No. 2 (Lower, Single or Left Side) Circuit Range/Performance

B0184 ⁽³⁾

Solar Load Sensor No. 1 CKT Range

B0229 ⁽³⁾

Air Flow Control No. 7 (Recirc) Feedback Circuit Range/Performance

B0248 ⁽³⁾

Mode Door Inoperative Error

B0268 ⁽³⁾

Air Flow Control No. 7 (Recirc) Circuit Malfunction

B0408 ⁽³⁾

Temperature Control No. 1 (Main/Front) Circuit Malfunction

B0414 ⁽³⁾

Temperature Control No. 1 (Main/Front) Feedback Circuit Range/Performance

B0429 ⁽³⁾

Air Mix Door No. 3 Range Error

B0434 ⁽³⁾

Temperature Control No. 3 Rear Feedback Circuit Range

B1000 ⁽¹⁾⁽²⁾

ECU Malfunction

B1001 ⁽¹⁾

Option Configuration Error

B1004 ⁽²⁾

Keep Alive Memory (KAM) Reset

B1009 ⁽²⁾

EEPROM Checksum Error

B1020 ⁽³⁾

Auxiliary ECU Malfunction

B1367 ⁽⁴⁾

IPC Ignition 0 Circuit Low

B1397 ⁽⁵⁾

Device Voltage Reference Output No. 1 Circuit Low

B1398 ⁽⁵⁾

Device Voltage Reference Output No. 1 Circuit High

B1477 ⁽⁶⁾

Retained Accessory Power Circuit Low

B1478 ⁽⁶⁾

Retained Accessory Power Circuit High

B1480 ⁽⁵⁾

Battery Rundown Protection Circuit Malfunction

B2462 ⁽²⁾

GPS Signal Error

B2476 ⁽²⁾

Cellular Phone Select Service Switch Malfunction

B2527 ⁽⁷⁾

Front Fog Light Circuit Low

B2577 ⁽⁷⁾

Headlight Control Circuit Low

B2585 ⁽⁸⁾

Parking Light Control Circuit Malfunction

B2613 ⁽⁹⁾

Passenger Compartment Dimming No. 1 Circuit High

B2617 ⁽⁹⁾

Passenger Compartment Dimming No. 2 Circuit Low

B2618 ⁽⁹⁾

Passenger Compartment Dimming No. 2 Circuit High

B2642 ⁽⁸⁾

Delayed Exterior Lighting Control Circuit Low

B2643 ⁽⁸⁾

Delayed Exterior Lighting Control Circuit High

B2647 ⁽⁷⁾

Ambient Light Sensor Circuit Low

B2648 ⁽⁷⁾

Ambient Light Sensor Circuit High

B2722 ⁽¹⁰⁾

Transmission Preference Switch Circuit Low

B2752 ⁽¹¹⁾

Horn Relay Coil Circuit Low

B2947 ⁽¹²⁾

Security System Sensor Power Circuit Low

B2948 ⁽¹²⁾

Security System Sensor Power Circuit High

B2957 ⁽¹²⁾

Security System Sensor Data Circuit Low

B2958 ⁽¹²⁾

Security System Sensor Data Circuit High

B2960 ⁽¹²⁾

Security System Sensor Data Incorrect But Valid

B2961 ⁽¹²⁾

Key In Ignition Circuit Malfunction

B2973 ⁽¹²⁾

Left Front Door Key Switch Circuit Low

B3031 ⁽¹²⁾

Security System Controller in Learn Mode

B3033 ⁽¹²⁾

Security System Indicates Tamper

B3102 ⁽¹³⁾

Keyless Entry Data Link Circuit Low

B3137 ⁽¹⁴⁾

All Door Lock Circuit Low

B3138 ⁽¹⁴⁾

All Door Lock Circuit High

B3147 ⁽¹⁴⁾

Right Front Unlock Switch Circuit Low

B3148 ⁽¹⁴⁾

Right Front Unlock Switch Circuit High

B3531 ⁽³⁾

Air Flow Control No. 10 Rear Circuit Malfunction

B3579 ⁽³⁾

Output Air Temperature Sensor No. 6 Circuit Range/Performance

B3584 ⁽³⁾

Output Air Temperature Sensor No. 7 Circuit Range/Performance

B3761 ⁽³⁾

Air Flow Control No. 3 (Blend Defog/Floor) Feedback Circuit Range/Performance

B3764 ⁽³⁾

Airflow Control No. 4 Mode Feedback Circuit Malfunction

U1000 & U1255 ⁽⁵⁾

Class 2 Communication Malfunction

U1001-U1254 ⁽⁵⁾

Loss of XXX Communications

U1300 ⁽⁵⁾

Class 2 Data Link Low

U1301 ⁽⁵⁾

Class 2 Data Link High

U1500 ⁽³⁾

Communication (Front-To-Rear) State Of Health

U1500 ⁽²⁾

Inter-Device Dedicated Bus Malfunction

⁽¹⁾	For information on air bag DIAGNOSIS & TESTING or DISPOSAL PROCEDURES, see lemon-25® AIR BAG SERVICE & REPAIR MANUAL, DOMESTIC & IMPORTED MODELS.

⁽²⁾	Repair OnStar® system as necessary.

⁽³⁾	Perform appropriate diagnostic procedure. See appropriate AUTOMATIC A/C-HEATER SYSTEMS article in AIR CONDITIONING & HEATING.

⁽⁴⁾	Perform appropriate diagnostic procedure. See appropriate ANALOG INSTRUMENT PANELS article.

⁽⁵⁾	Perform appropriate test under DIAGNOSTIC TESTS.

⁽⁶⁾	Repair appropriate circuit as necessary. See WIRING DIAGRAMS .

⁽⁷⁾	Repair appropriate circuit as necessary. See HEADLIGHT SYSTEMS & DAYTIME RUNNING LIGHTS article.

⁽⁸⁾	Repair appropriate circuit as necessary. See EXTERIOR LIGHTS article.

⁽⁹⁾	Repair appropriate circuit as necessary. See ILLUMINATION/INTERIOR LIGHTS article.

⁽¹⁰⁾	Perform appropriate diagnostic procedure. See appropriate ELECTRONIC CONTROLS article in AUTOMATIC TRANSMISSIONS.

⁽¹¹⁾	Perform appropriate diagnostic procedure. See appropriate STEERING COLUMN SWITCHES article.

⁽¹²⁾	Perform appropriate diagnostic procedure. See appropriate ANTI-THEFT SYSTEMS article.

⁽¹³⁾	Perform appropriate diagnostic procedure. See appropriate REMOTE KEYLESS ENTRY SYSTEMS article.

⁽¹⁴⁾	Perform appropriate diagnostic procedure. See appropriate POWER DOOR LOCKS article.