DTC P0510 (CLOSED THROTTLE POS.SWITCH MALFUNCTION)

Applicable Models

0002459 Dealer Repair Information

Customer experiences check engine light, DTC P0510 found in memory.     
                                                                        
 1. Customer should be questioned on what foot they brake with. If      
    customer is a double footed driver (brakes with left and depresses  
the     accelerator with the right) they should be informed that this   
type of                                                                 
    driving style may send conflicting signals to the PCM causing DTC to
                                                                        
    occur.                                                              
 2. Monitor the closed throttle position switch with the NGS tester.    
    PID.(CTP SW)                                                        
                                                                        
  A. If signal doesn't change on the NGS tester when the throttle is    
     opened and closed, test the closed throttle position switch ( w/s  
     manual page F1-52 ), and/or check for an open or short in the      
     Silver/Black wire from the closed throttle position switch to      
     terminal 3L of the PCM.                                            
     Voltage signal should change from below 1V to B+ when throttle is  
     opened.                                                            
                                                                        
  B. If signal changes and or driving style cannot be determined, using 
a      digital voltmeter, adjust the TPS voltage to exactly 0.8 volts.  
                                                                        
 NOTE: Do not use the NGS tester when doing the above adjustment, and   
       readings should not exceed 0.8 volts.                            
                                                                        
3. Ground the the TEN PIN and check the BASE IDLE N TIMING, adjust if   
   necessary