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Table of Contents > Blower Power Transistor Test (Manual A/C)

Honda CR-V Heating, Ventilation & Air Conditioning Troubleshooting ➜ Blower Power Transistor Test (Manual A/C)

8. Passenger's Dashboard Undercover  
1. Install the passenger's dashboard undercover (A). Make sure the clips (B) snap into place securely,  
and the pins (C) into the holder (D) securely.  
Fig. 71: Identifying Passenger's Dashboard Undercover, Clips And Pins  
Courtesy of AMERICAN HONDA MOTOR CO., INC.  
BLOWER POWER TRANSISTOR TEST (MANUAL A/C)  
REMOVAL  
1. Passenger's Dashboard Undercover  
1. Gently pull down the passenger's dashboard undercover (A) to detach the clips (B), then pull away  
the undercover to release the pins (C) from the holder (D).  
Fig. 72: Identifying Passenger's Dashboard Undercover, Clips, Pins And Holder  
Courtesy of AMERICAN HONDA MOTOR CO., INC.  
2. Glove Box  
1. Remove the bolts (A).  
Fig. 73: Identifying Glove Box Bolts  
Courtesy of AMERICAN HONDA MOTOR CO., INC.  
2. Release both glove box stops (A) by pushing them in, then let the glove box (B) hang down.  
Fig. 74: Pushing Glove Box Stops  
Courtesy of AMERICAN HONDA MOTOR CO., INC.  
3. Detach the glove box damper hook (A), then remove the glove box (B).  
Fig. 75: Removing Glove Box  
Courtesy of AMERICAN HONDA MOTOR CO., INC.  
3. Glove Box Frame  
1. Remove the glove box frame (A).  
Fig. 76: Identifying Glove Box Frame  
Courtesy of AMERICAN HONDA MOTOR CO., INC.  
4. Passenger's Heater Duct  
1. Remove the passenger's heater duct (A).  
Fig. 77: Identifying Passenger's Heater Duct  
Courtesy of AMERICAN HONDA MOTOR CO., INC.  
5. Power Transistor  
1. Remove the power transistor (A).  
Fig. 78: Identifying Power Transistor  
Courtesy of AMERICAN HONDA MOTOR CO., INC.  
6. Shift Lever Panel (AT)  
1. Carefully pry out the shift lever panel (A) with the appropriate trim tool to detach the clips (B, C)  
and the hooks (D), then remove the shift lever panel.  
Fig. 79: Identifying Shift Lever Panel, Clips And Hooks  
Courtesy of AMERICAN HONDA MOTOR CO., INC.  
7. Driver's Inner Dashboard Trim Panel  
1. Carefully pry out the driver's inner dashboard trim panel (A) with the appropriate trim tool to  
detach the clips (B), then remove the driver's inner dashboard trim panel.  
Fig. 80: Identifying Driver's Inner Dashboard Trim Panel  
Courtesy of AMERICAN HONDA MOTOR CO., INC.  
8. HVAC Control Unit Assembly  
1. Remove the HVAC control unit assembly (A), then disconnect the connector (B).  
Fig. 81: Identifying HVAC Control Unit Assembly And Connector  
Courtesy of AMERICAN HONDA MOTOR CO., INC.  
TEST  
1. Power Transistor - Test  
1. Measure the resistance between terminals No. 2 and No. 4 of the power transistor. It should be  
about 1.5 kohms.  

If the resistance is within the specifications, go to step 3.  

If the resistance is not within the specifications, replace the power transistor.  
NOTE:  
Also check the blower motor. Power transistor failure can be caused  
by a defective blower motor.  
2. Reconnect the power transistor connector.  
Fig. 82: Power Transistor Connector Terminals Layout  
Courtesy of AMERICAN HONDA MOTOR CO., INC.  
3. Connect HVAC control unit connector terminals No. 9 and No. 12 with a jumper wire.  
4. Turn the ignition switch to ON (II).  
5. Check that the blower motor runs.  

If the blower motor does not run, replace the power transistor.  
NOTE: A faulty blower motor can cause the power transistor to fail.  
Before replacing the power transistor, check the blower motor  
for binding, and replace it if necessary.  

If the blower motor runs, the power transistor is OK.  
Fig. 83: HVAC Control Unit 32P Connector Terminal Layout  
Courtesy of AMERICAN HONDA MOTOR CO., INC.  
INSTALLATION  
1. HVAC Control Unit Assembly  
1. Connect the connector (A), then install the HVAC control unit assembly (B).  
Fig. 84: Identifying HVAC Control Unit Assembly And Connector  
Courtesy of AMERICAN HONDA MOTOR CO., INC.  
2. Driver's Inner Dashboard Trim Panel  
1. Install the driver's inner dashboard trim panel (A). Make sure the clips (B) snap into place securely.  
Fig. 85: Identifying Driver's Inner Dashboard Trim Panel And Clips  
Courtesy of AMERICAN HONDA MOTOR CO., INC.  
3. Shift Lever Panel (AT)  
1. Install the shift lever panel (A). Make sure the clips (B, C) and the hooks (D) snap into place  
securely.  
Fig. 86: Identifying Shift Lever Panel, Clips And Hooks  
Courtesy of AMERICAN HONDA MOTOR CO., INC.  
4. Power Transistor  
1. Install the power transistor (A).  
Fig. 87: Identifying Power Transistor  
Courtesy of AMERICAN HONDA MOTOR CO., INC.  
5. Passenger's Heater Duct  
1. Install the passenger's heater duct (A).  
Fig. 88: Identifying Passenger's Heater Duct  
Courtesy of AMERICAN HONDA MOTOR CO., INC.  
6. Glove Box Frame  
1. Install the glove box frame (A).  
Fig. 89: Identifying Glove Box Frame  
Courtesy of AMERICAN HONDA MOTOR CO., INC.  
7. Glove Box  
1. Install the glove box (A), then install the glove box damper hook (B).  
Fig. 90: Installing Glove Box  
Courtesy of AMERICAN HONDA MOTOR CO., INC.  
2. Install the bolts (A).  
Fig. 91: Identifying Glove Box Bolts  
Courtesy of AMERICAN HONDA MOTOR CO., INC.  
8. Passenger's Dashboard Undercover  
1. Install the passenger's dashboard undercover (A). Make sure the clips (B) snap into place securely,  
and the pins (C) into the holder (D) securely.  
Fig. 92: Identifying Passenger's Dashboard Undercover, Clips, Pins And Holder  
Courtesy of AMERICAN HONDA MOTOR CO., INC.  
CLIMATE CONTROL SYSTEM DTC TROUBLESHOOTING INDEX  
DTC  
U1280 Communication bus line error (BUS-OFF)  
Lost communication > with gauge control module (climate Climate control Loss of  
Detection Item or Symptom  
ECU  
Climate control Loss of  
unit communication  
DTC type  
U128D  
control unit)  
unit  
communication  
Climate control  
unit  
B121A An open in the mode control motor circuit  
Signal error  
Climate control  
unit  
B121B A short in the mode control motor circuit  
Signal error  
Climate control Lost of  
B121D Humidity/in-car temperature sensor communication error  
B1220 A short in the recirculation control motor circuit  
B1227 An open in the outside air temperature sensor circuit  
B1228 A short in the outside air temperature sensor circuit  
unit  
communication  
Climate control  
unit  
Climate control  
unit  
Climate control  
unit  
Signal error  
Signal error  
Signal error  
Climate control  
B1229 An open in the sunlight sensor circuit  
B1230 A short in the sunlight sensor circuit  
unit  
Signal error  
Signal error  
Climate control  
unit  
Climate control  
unit  
Climate control  
unit  
Climate control  
unit  
Climate control  
unit  
Climate control  
unit  
Climate control  
unit  
Climate control  
unit  
B1231 An open in the evaporator temperature sensor circuit  
B1232 A short in the evaporator temperature sensor circuit  
B1233 An open in the air mix control motor circuit (driver's)  
B1234 A short in the air mix control motor circuit (driver's)  
Signal error  
Signal error  
Signal error  
Signal error  
Signal error  
Signal error  
Signal error  
Signal error  
Signal error  
Signal error  
A problem in the air mix control motor circuit, linkage,  
door, or motor (driver's)  
B1235  
B1236 An open in the passenger's air mix control motor circuit  
B1237 A short in the passenger's air mix control motor circuit  
A problem in the passenger's air mix control motor circuit, Climate control  
B1238  
B1240  
linkage, door, or motor  
unit  
A problem in the mode control motor circuit, linkage, door, Climate control  
or motor  
unit  
Climate control  
unit  
B1241 A problem in the blower motor circuit  
Climate control unit lost communication with MICU  
(WIPSW message)  
Climate control Loss of  
B2969  
unit  
communication  
A problem in the recirculation control motor circuit,  
linkage, door, or motor  
Climate control  
unit  
Climate control  
unit  
B2983  
Signal error  
Signal error  
B2986 An open in the recirculation control motor circuit  
CLIMATE CONTROL UNIT CONNECTOR FOR INPUTS AND OUTPUTS  
CLIMATE CONTROL UNIT INPUTS AND OUTPUTS  
reload full screen
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2024 Honda CR-V Owner's Manual2024 Honda CR-V Owner's Manual
2023 Honda CR-V Owner's Manual2023 Honda CR-V Owner's Manual
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