Acura TSX / Honda Accord CL. Manual - part 248

DTC TROUBLESHOOTING 

DTC B1125: DRIVER'S POWER WINDOW MOTOR A PULSE ERROR; DTC B1126: DRIVER'S 
POWER WINDOW MOTOR B PULSE ERROR 

1. Open and close the driver's power window by using the driver's switch manually.  

2. While the power window moving, select POWER WINDOWS from the HDS and enter the DATA LIST. 

3. Check the EXIST/NONE information of the P/W PLSA (B1125) or P/W PLSB (B1126) in the DATA 

LIST. 

Do the information indicators display EXIST? 

YES: Replace the power window master switch.  

NO: Go to step 4.  

4. Refer to the power window master switch input test, check for continuity between the driver's power 

window motor 6P connector and the power window master switch 23P connector (see MASTER 
SWITCH INPUT TEST ). 

Are all the wire harnesses OK? 

YES: Substitute a known-good power window master switch, and recheck. If DTC is gone, 
the original master switch is faulty; replace it. If the DTC is still indicated, replace the 
driver's power window motor.  

NO: Repair a short or an open in the wire.  

DTC B1140: DRIVER'S POWER WINDOW POSITION DETECT CIRCUIT ERROR 

1. Clear the DTCs using the HDS.  

2. Cycle the ignition switch to OFF and then back ON (II).  

3. Open and close the driver's power window by using the driver's switch manually.  

4. Check for DTCs using the HDS. 

Is DTC B1125 or B1126 indicated? 

YES: Troubleshoot the DTC B1125 or B1126 (see DTC B1125: DRIVER'S POWER 
WINDOW MOTOR A PULSE ERROR; DTC B1126: DRIVER'S POWER WINDOW 
MOTOR B PULSE ERROR ).  

NO: Go to step 5.  

5. Do the power window control unit reset procedure (see RESETTING THE POWER WINDOW ).  

6. Check for DTCs again using the HDS. 

Is DTC B1140 indicated? 

YES: Faulty door multiplex control unit; replace the power window master switch.  

NO: The system is recovered at this time. 

 

2004 Acura TSX 

2004 ACCESSORIES & EQUIPMENT Power Windows - TSX

  

 

2004 ACCESSORIES & EQUIPMENT

Rear Window Defogger - TSX 

COMPONENT LOCATION INDEX 

Fig. 1: Locating Rear Window Defogger Components 

CIRCUIT DIAGRAM 

 

2004 Acura TSX 

2004 ACCESSORIES & EQUIPMENT Rear Window Defogger - TSX

  

 

2004 Acura TSX 

2004 ACCESSORIES & EQUIPMENT Rear Window Defogger - TSX

  

 

 

Fig. 2: Rear Window Defogger System Wiring Diagram 

FUNCTION TEST 

Before troubleshooting the rear window circuit, perform multiplex integrated control system troubleshooting 
using B-CAN System Diagnosis Test Mode A (see B-CAN SYSTEM DIAGNOSIS TEST MODE A ).

 

2004 Acura TSX 

2004 ACCESSORIES & EQUIPMENT Rear Window Defogger - TSX

  

 

1. Check for voltage between the positive terminal (A) and body ground with the ignition switch and 

defogger switch ON. There should be battery voltage. 

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If there is no voltage, check for: 

„

Faulty defogger relay.  

„

Faulty window antenna coil.  

„

Faulty climate control unit (audio-HVAC-display module)  

„

An open in the BLK/YEL wire to the positive terminal.  

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If there is voltage, go to step 2.  

Fig. 3: Checking For Voltage Between The Positive Terminal & Body Ground 

2. Disconnect the negative terminal (B) from the rear window defogger.  

3. Check for continuity between the negative terminal (B) and body ground. 

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If there is no continuity, check for an open in the BLK/YEL wire and ground.  

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If there is continuity, go to step 4.  

4. Reconnect the negative terminal to the rear window defogger.  

5. Turn the ignition switch ON (II) and the rear window defogger switch ON.  

NOTE:

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Be careful not to scratch or damage the defogger wires with the tester 
probe.  

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Before testing, check the No. 14 (40A) fuse in the under-hood fuse/relay 
box and No. 30 (7.5A) fuse in the under-dash fuse/relay box.  

 

2004 Acura TSX 

2004 ACCESSORIES & EQUIPMENT Rear Window Defogger - TSX