Hello - I have a 2002 Accord, the D4 light doesn't work, it will not shift out of Park. Any suggestions? Thank you for your help.

 

Im thinking the brake switch is your culprit. Also, if you look closely at the shifter there is a small plastic cover next to the shifter pop the small cover out and put the key into the slot where the cover was. That should allow you to shift it. Also, are you sure the d4 bulb isnt just blown? Does teh car shift fine when driving?

 

The car is not shifting right you have to rev the car up to get it to shift. The brake lights do work. We can manually stick something in their manually get it to shift, but it still shifts very hard and rough and won't go out of park. Have you had any experience with the Transmission Control Unit?

 

It sounds like a bad neutral safety switch, it's located under the center console on the left of the gear selection assembly. But if the shifting itself is messed up I'd try checking your tranny fluid and changing it. If that doesn't help your tranny might be on its way out.

 

2.3 or 3.0? Yeah the shifting hard is a whole nother ball game. Using honda fluid, change the fluid...and hope for the best

 

Some possible culprits:

• Blown fuse – check driver’s side under-dash Fuse no. 9 (7.5A). If brake lights work, then under-hood Fuse no. 47 (20A) is okay.

• Wiring issue - short or open (break) in wiring

• Brake pedal position switch – are brake lights on even if pedal not pressed? Also, make sure the brake pedal stopper pad is still there.

• Throttle position sensor - Try unplugging the connector to the TPS, you’ll get a Check Engine Light; but, see if you can shift out of Park.

The voltage needs to be at less than .5 volts (this essentially tells the PCM the accelerator pedal is not depressed and the throttle is closed). If it is at a higher voltage, the PCM thinks the accelerator is depressed and the throttle is open and prevents the shift lock solenoid from energizing (you won’t be able to shift out of Park).

• PCM (Powertrain Control Module)

• Transmission Range Switch – Is the P light on? Can be faulty even if P light is on.

This is how the shift position interlock works:
When you push the brake pedal, battery voltage is sent through a WHT/BLK wire to the PCM. If, at the same time, you do not push the accelerator pedal, a low voltage signal is sent from the TPS through a RED/BLK wire to the PCM. The PCM then applies voltage through a WHT/RED wire to the shift lock circuit in the driver’s multiplex control unit. When you move the A/T shift lever from the PARK position, ground is provided to the shift lock solenoid. The solenoid is then energized allowing the shift lever to be moved from the PARK position.