Acura TSX / Honda Accord CL. Manual - part 128

YES: Go to step 5.  

NO: Intermittent failure. The driver's door key cylinder system is OK at this time. Check pin 
fits and connections.  

5. With no driver's door key cylinder operation, select SECURITY from the HDS, and enter the DATA 

LIST.  

6. Check the ON/OFF information of the Driver's Door Key Cylinder Switch (LOCK) and Driver's Door 

Key Cylinder Switch (UNLOCK) in the DATA LIST. 

Are both information indicators OFF? 

YES: Go to step 7.  

NO: Go to step 10.  

7. Turn the driver's door key cylinder to the LOCK and UNLOCK positions with the ignition key and check 

the ON/OFF information of the Driver's Door Key Cylinder Switch (LOCK) and Driver's Door Key 
Cylinder Switch (UNLOCK) in the DATA LIST. 

Is the driver's door key cylinder switch (LOCK) (driver's door key cylinder switch 
(UNLOCK)) information indicator on when the key cylinder is in the LOCK (UNLOCK) 
position, and off when the key is returned to the neutral position? 

YES: Intermittent failure, the door multiplex control unit (power window master switch) is 
OK at this time. Check pin fits and connections.  

NO: Go to step 8.  

8. Disconnect the driver's door key cylinder switch 3P connector.  

9. Check for continuity between the No. 3 (LOCK) and No. 1 (UNLOCK) terminals of the driver's door key 

cylinder switch 3P connector and the No. 8 (LOCK) and No. 21 (UNLOCK) terminals of the power 
window master switch 23P connector. 

Is there continuity? 

YES: Faulty driver's door key cylinder switch.  

NO: Repair an open in the WHT/RED (LOCK) or WHT (UNLOCK) wire.  

 

2004 Acura TSX 

2004 ACCESSORIES & EQUIPMENT Keyless Entry/Security Alarm System - TSX

  

 

Fig. 20: Checking For Continuity 

10. Disconnect the driver's door key cylinder switch 3P connector.  

11. Check the ON/OFF information of the Driver's Door Key Cylinder Switch (LOCK) and Driver's Door 

Key Cylinder Switch (UNLOCK) in the DATA LIST. 

Are both information indicators OFF? 

YES: Faulty driver's door key cylinder switch.  

NO: Go to step 12.  

12. Check for continuity between the No. 3 (LOCK) and No. 1 (UNLOCK) terminals of the driver's door key 

cylinder switch 3P connector and body ground. 

Is there continuity? 

YES: Repair a short in the WHT/RED (LOCK) or WHT (UNLOCK) wire.  

NO: Faulty door multiplex control unit; replace the power window master switch. 

 

2004 Acura TSX 

2004 ACCESSORIES & EQUIPMENT Keyless Entry/Security Alarm System - TSX

  

 

Fig. 21: Checking For Continuity Between The Driver's Door Key Cylinder Switch 3P 
Connector & Body Ground 

DTC B1128: DRIVER'S DOOR LOCK SWITCH SIGNAL ERROR 

1. Clear the DTCs using the HDS.  

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

3. Operate the driver's door look switch.  

4. Check for DTCs using the HDS. 

Is DTC B1128 indicated? 

YES: Go to step 5.  

NO: Intermittent failure. The driver's door lock switch system is OK at this time. Check pin 
fits and connections.  

5. With no driver's door lock switch operation, select SECURITY from the HDS, and enter the DATA 

 

2004 Acura TSX 

2004 ACCESSORIES & EQUIPMENT Keyless Entry/Security Alarm System - TSX

  

 

LIST.  

6. Check the ON/OFF information of the Driver's Door Lock Switch (LOCK) and Driver's Door Lock 

Switch (UNLOCK) in the DATA LIST. 

Are both information indicators OFF? 

YES: Go to step 7.  

NO: Check the door lock switch. If the driver's door lock switch is OK, faulty door multiplex 
control unit; replace the power window master switch.  

7. Push the driver's door lock switch in LOCK and UNLOCK positions, and check the ON/OFF information 

of the Driver's Door Lock Switch (LOCK) and Driver's Door Lock Switch (UNLOCK) in the DATA 
LIST. 

Is the driver's door lock switch (LOCK) (driver's door lock switch (UNLOCK)) information 
indicator on when the door lock switch is pushed in each switch position, and off when the 
door lock switch is released? 

YES: Intermittent failure, the door multiplex control unit (power window master switch) is 
OK at this time. Check pin fits and connections.  

NO: Faulty door multiplex control unit; replace the power window master switch.  

DTC B1129: DRIVER'S DOOR LOCK KNOB SWITCH SIGNAL ERROR 

1. Clear the DTCs using the HDS.  

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

3. Operate the driver's door lock knob switch.  

4. Check for DTCs using the HDS. 

Is DTC B1129 indicated? 

YES: Go to step 5.  

NO: Intermittent failure. The driver's door lock knob switch system is OK at this time. Check 
pin fits and connections.  

5. Select SECURITY from the HDS, and enter the DATA LIST. 

Check the ON/OFF information of the Driver's Door Lock knob Switch (LOCK) and Driver's Door Lock 
knob Switch (UNLOCK) in the DATA LIST.  

Is the driver's door lock knob switch (LOCK) information indicator on and driver's door 
lock knob switch (UNLOCK) information indicator off with the door lock knob switch in lock 
position, and is the driver's door lock knob switch (LOCK) information indicator off and 
driver's door lock knob switch (UNLOCK) information indicator on with the door lock knob 
switch in unlock position? 

YES: Intermittent failure, the door multiplex control unit (power window master switch) is 
OK at this time. Check pin fits and connections.  

NO: Go to step 6.  

6. Disconnect the driver's door lock knob switch 3P connector.  

7. Check the ON/OFF information of the Driver's Door Lock knob Switch (LOCK) and Driver's Door Lock 

knob Switch (UNLOCK) in the DATA LIST. 

 

2004 Acura TSX 

2004 ACCESSORIES & EQUIPMENT Keyless Entry/Security Alarm System - TSX