It use to happen that whenever i drive on a rough road or take a sharp turn the D4 light starts blinking. After several checks the company diagnosed that the engine harness is to be replaced.
My question is that, will this solve my problem or what is the other way out.
2007-12-05 23:10:08 · 3 answers · asked by imu 1 in Cars & Transportation ➔ Car Makes ➔ Honda
I usually see a technician recommend an entire wiring harness when they're grasping at straws and don't know what else to do. They rationalize that since the problem is intermittant that it must be a broken wire somewhere in the harness. In reality if the problem is in the harness as claimed it is usually a problem with a loose terminal inside a connector that is not making a good contact and not with a broken wire or otherwise "defective" harness.
Wiring harnesses are not 'fixed' in position in the car. They are allowed to move as the engine moves back and forth. Your engine will move back and forth as you accelerate and decelerate or as you add a load, such as heavy power steering from sharp turns to the engine. If the wiring harness is restricted from moving with the engine the effect would be similar to pulling on the plug for a light that you have plugged into a wall socket in your living room. As you run out of 'slack' your light will start to flicker and eventually go out as you continue to pull on the cord. Same with the wiring harness--as it is pulled on through engine or suspension movement the loose terminal will break contact and the power is lost to the component that is tied to the transmission monitoring computer. When that happens the computer recognizes whatever lost power is not working and it puts the D4 light on to alert you to that malfunction.
There should be a code stored if the D4 light is on. What is that code? Are you taking the car to a Honda dealer or is this at an independent shop? If its an independent, take the car out of there and take it to a Honda dealer. Find out the code and that will tell you what circuit is malfunctioning. Then you can have someone who knows what they're doing troubleshoot that one circuit and not condem the harness.
hope that answers your question
2007-12-06 04:14:51 · answer #1 · answered by honda guy 7 · 0⤊ 3⤋
It is hard to determine if the replacement of the harness will solve the problem. If you believe that driving at rough road is the cause of the problem, the broken harness should be located undeneath the car.
2007-12-06 00:57:40 · answer #2 · answered by r_kelly 2 · 0⤊ 1⤋
yep it will fix it but why did it happen in the first place , that's what I'd ask them , it should not have happened
2007-12-05 23:20:04 · answer #3 · answered by jim m 7 · 1⤊ 0⤋