speed sensor circuit
 

hi there ! got a bit of a problem with 2004 h2
dtc comes back as speed sensor circuit input low ! car still drives ok but doesn`t appear to change up beyond second gear speedo reading zero ( for few months now ) but gearbox problem only just come up ! i`ve tried swapping speed sensor with known good one from another vehicle but made no difference at all
i`d appreciate any and all help or advice you can offer

Re: speed sensor circuit
 

check harness for broken wires from speed sensor(on the transfer case)

Re: speed sensor circuit
 

no sign of obvious damage to the harness ! does anyone know where the other end of the 2 cables is so i can unplug and bell wires through

Re: speed sensor circuit
 

PCM connector c2 pins 21 purple and white wire pin 20 light green and black wire. C2 is the green 80 way connector on the pcm.

Re: speed sensor circuit
 

thank you ! will get on that first thing in the morning

Re: speed sensor circuit
 

:clapping: indeed it was !! l/gr and bl wire about 6 inches inside loom !! repaired and driving fine now :excited: !! still no speedo tho

Re: speed sensor circuit
 

Need to get a scanner on it and see if you are getting a speed signal to the pcm. Then check speed signal in cluster data, if both of those are good then its the cluster itself.