Acura TSX / Honda Accord CL. Manual - part 70

Fig. 1: Disconnecting The 6P Connector From The Driver's Under-Dash Fuse/Relay Box

5. Check for continuity between the terminals in each switch position according to the table. See Fig. 2 . 

Fig. 2: Ignition Switch Continuity Test Table 

6. If the continuity checks do not agree with the table, replace the steering lock.  

7. After reconnecting the battery, enter the anti-theft code for the radio and the navigation system, then enter 

the customer's radio station presets.  

8. Do the engine idle learn procedure (see ECM/PCM IDLE LEARN PROCEDURE ) and the power 

window control unit reset procedure (see RESETTING THE POWER WINDOW ).  

 

2004 Acura TSX 

2004 ACCESSORIES & EQUIPMENT Ignition Switch - TSX

  

 

2004 ACCESSORIES & EQUIPMENT

Immobilizer System - TSX 

COMPONENT LOCATION INDEX 

Fig. 1: Locating Immobilizer System Components (1 Of 2)

 

2004 Acura TSX 

2004 ACCESSORIES & EQUIPMENT Immobilizer System - TSX

  

 

2004 Acura TSX 

2004 ACCESSORIES & EQUIPMENT Immobilizer System - TSX

  

 

 

Fig. 2: Locating Immobilizer System Components (2 Of 2) 

SYSTEM DESCRIPTION 

The vehicle is equipped with an immobilizer system that will disable the vehicle unless the proper ignition key 
is used. This system consists of a transponder located in the ignition key, an immobilizer control unit-receiver, 
an indicator, and the ECM/PCM. 

When the key is inserted in the ignition switch and turned to the on (II) position, the immobilizer control unit-
receiver sends power to the transponder in the ignition key. The transponder then sends a coded signal back to 
the immobilizer control unit-receiver which then sends a coded signal to the ECM/PCM. 

 

2004 Acura TSX 

2004 ACCESSORIES & EQUIPMENT Immobilizer System - TSX

  

 

Fig. 3: Immobilizer System Schematic 

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If the proper key has been used, the immobilizer indicator will come on for about 2 seconds, then go off.  

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If the wrong key has been used or the code was not received or recognized by the unit, the indicator will 
come on for about 2 seconds, then it will blink until the ignition switch is turned OFF.  

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If the ignition switch is turned OFF, the indicator will blink for about 5 seconds to signal that the unit has 
reset correctly, then the indicator will go off.  

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If the customer has lost their key, and cannot start the engine, contact Acura Customer Relations.  

Fig. 4: Immobilizer Indicator Light Blinking Pattern 

CIRCUIT DIAGRAM 

 

2004 Acura TSX 

2004 ACCESSORIES & EQUIPMENT Immobilizer System - TSX