B1200

Factory Manual References

Factory service manual diagnostic procedure for 2012 acura mdx

Climate Control DTCS

CLIMATE CONTROL DIAGNOSTIC TROUBLE CODE (DTC) INDENTIFICATION

DTC Description
B1200 Communication circuit error (BUS-OFF)
B1202 Climate control unit internal error
B1205 Climate control unit lost communication with gauge control module (VSP/NE message)
B1206 Climate control unit lost communication with gauge control module (coolant temp message)
B1207 Climate control unit lost communication with gauge control module (illumination message)
B1213 An open in the rear evaporator temperature sensor circuit
B1214 A short in the rear evaporator temperature sensor circuit
B1215 An open or short in the recirculation control motor circuit
B1223 A problem in the rear blower motor circuit
B1225 An open in the in-car temperature sensor circuit
B1226 A short in the in-car temperature sensor circuit
B1227 An open in the outside air temperature sensor circuit
B1228 A short in the outside air temperature sensor circuit
B1229 An open in the sunlight sensor circuit
B1230 A short in the sunlight sensor circuit
B1231 An open in the evaporator temperature sensor circuit (front)
B1232 A short in the evaporator temperature sensor circuit (front)
B1233 An open in the air mix control motor circuit (driver's)
B1234 A short in the air mix control motor circuit (driver's)
B1235 A problem in the air mix control motor circuit, linkage, door, or motor (driver's)
B1236 An open in the passenger's air mix control motor circuit
B1237 A short in the passenger's air mix control motor circuit
B1238 A problem in the passenger's air mix control motor circuit, linkage, door, or motor
B1239 An open or short in the mode control motor circuit (front)
B1240 A problem in the mode control motor circuit, linkage, doors, or motor (front)
B1241 A problem in the front blower motor circuit
B1244 An open in the rear air mix control motor circuit
B1245 A short in the rear air mix control motor circuit
B1246 A problem in the rear air mix control motor circuit, linkage, door, or motor
B2965 Rear communication failure
B2967 An open in the humidity sensor circuit
B2968 A short in the humidity sensor circuit
B2969 Climate control unit lost communication with MICU (WIPSW message)
B2970 Climate control unit lost communication with gauge control unit (RM message)
B2979 An open in the A/C pressure sensor circuit
B2980 A short in the A/C pressure sensor circuit
B2983 A problem in the recirculation control motor circuit, linkage, door, or motor
B2991 Climate control unit lost communication with audio system

A L L Diagnostic Trouble Codes ( DTC )

B1050




DTC Troubleshooting: B1050, B1200, B1250, B1150, B1750, B1900, B1950, B2150, B1800, B1350

DTC B1050:

Communication Circuit Error (BUS-OFF)

DTC B1150:

Communication Circuit Error (BUS-OFF)

DTC B1200:

Communication Circuit Error (BUS-OFF)

DTC B1250:

Communication Circuit Error (BUS-OFF)

DTC B1350:

Communication Circuit Error (BUS-OFF)

DTC B1800:

Communication Circuit Error (BUS-OFF)

DTC B1900:

Communication Circuit Error (BUS-OFF)

DTC B1950:

Communication Circuit Error (BUS-OFF)

DTC B2150:

Communication Circuit Error (BUS-OFF)

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A Troubleshooting - B-CAN System Diagnosis Test Mode A.

1. Clear the DTCs with the HDS.

2. Turn the ignition switch to LOCK (0) and then back ON (II).

3. Wait for more than 6 seconds.

4. Check for DTCs with the HDS.

Are DTCs B1050, B1150, B1200, B1250, B1350, B1800, B1900, B1950, and/or B2150 indicated?

YES -

Go to step 5.

NO -

Intermittent failure, the system is OK at this time. Check for loose or poor connections at the MICU and B-CAN connected units in the table.

Factory service manual diagram




5. Check for DTCs with the HDS.

Is DTC B1000 also indicated?

YES -

Troubleshoot DTC B1000.

NO -

Intermittent failure, the system is OK at this time. Check for loose or poor connections at the MICU and B-CAN connected units in the table.

Supporting Diagrams & Locations

Reference material from the factory manual for this diagnostic procedure.

Diagram

A/C Leak Detection (B07-025)

Diagram

Air Conditioning

Diagram

Anti-Lock Brakes

Diagram

Anti-Theft

Diagram

Body Control Modules

Diagram

Computer Data Lines

Location

Ac Power Outlet

Location

Accessory Power Sockets

Location

Active Damper System

Location

ACURALINK

Fuse/Relay

Acc/CMBS Indicator Is On With DTC 30 (14-022)

Fuse/Relay

Acc/CMBS Indicator Is On With DTC 30 (14-022)

Fuse/Relay

Acc/CMBS Indicator Is On With DTC 30 (14-022)

Fuse/Relay

2012 MDX: TQI Information (11-028)

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Always Enter Campaign Number On Proof Of Correction Certificate (B13010B)