Knock sensor

TREPONTE123

MEMBER
1990 NISSAN 300ZX
3.0L
V6
2WD
AUTOMATIC
121,000 MILES

I bought a Knock Sensor Bypass plug for my car because the code 34 comes up on the Nissan Datascan software and I believe is in safety mood based on how it drives. I called Z1 and they said that the plug should work once connected and when I clear the self diagnostic codes it shouldn't come up up and it does, so they said to check rhe wiring for the knock sensor that connects to the ECU and I want to know how to know what good/heathy wires look like?

1 Reply

JACOBANDNICKOLAS

MECHANIC
109,885 POSTS

Wiring that is not corroded, properly connected, and has no damage to the insulation is what you should look for. However, wiring can fool you. It can appear fine but be internally damaged / broken and not making good contact. If it appears good, disconnect the battery and check it for continuity. Basically from one end of the wire to the other, you are checking if power can flow through it with minimum resistance.

If you have a multi meter, set it to ohms. Touch the two connectors together to make sure it shows 0. Then place the connectors, one at each end, of the wire in question. If it shows close to 0, you have continuity. Wiggle the wire while testing to see if there is a break at some point.

Here are a couple links you may find helpful:

https://www.2carpros.com/articles/how-to-use-a-voltmeter

https://www.2carpros.com/articles/how-to-check-wiring

Let me know if this helps.

Joe