Question about Cars & Trucks
First thing to do is have the computer checked for trouble codes. The blinking D4 light means overdrive is not going to function, probably because of the rough running engine.
Posted on Feb 14, 2014
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Posted on Jan 02, 2017
Hi, a few questions 1st. Did your mechanic check for engine codes? Is your Honda a v-6 or 4 cylinder?
The flashing D4 light indicates a possible transmission malfunction. You should avoid rapid acceleration until the cause of the light blinking is determined.
If you have the V-6, there is a diagnostic port to connect a scan tool to read any stored engine codes that have turned on the check engine light. This port is located behind the ashtray in the center console (most cars did not have this til 96).
If you have the 4 cyl engine, there is a service connector located under the dash on the pass. side. Inside the connector is what looks like a 2 wire plug should be attached. Take a paper clip, unbend it, and insert the 2 ends of the clip into the connector to 'jump' it. Turn the ignition switch to the on position (don't start the vehicle), and the check engine light will flash. Count the flashes, short flashes are for code #'s 1 to 9 (single digit code), a 2 digit code will be a long flash for the 1st digit, followed by a short flash for the 2nd digit. If there is more than one code, they will be separated by a pause. They will repeat so you can count them and write them down. Let me know what the code #'s are so I can help further. Curt
Posted on Jul 22, 2009
These Accords have common problems with both the instrument clusters & the speedo drive Transducers. It is the Speedo Transducer I would head for first
though,it is located on the top rear of the transmission, over the diff assembly. This is in between where the driveshafts enter the transmission.
It is held in by 1 x 10mm bolt & has an electical connector clipped in to it which from memory has 3 wires. The connector is somewhat triangular in shape
& should be black. Check that this is not full of coolant from your recent thermostat change, however I doubt that this is the problem as they are sealed
pretty well. The chances are it is just faulty. This unit creates an electrical pulse which tells both the speedo & the transmission computer how
fast the vehicle is going. Without it the transmission computer will register a fault (D4 lamp flashing). It also informs the engine computer that there
is a problem which will activate the Check Engine Lamp.
Posted on Dec 07, 2009
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