speed sensor circuit

[wulf]

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

[HUMTECH]

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

[wulf]

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

[HUMTECH]

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.

[wulf]

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

[wulf]

Originally Posted by HUMTECH

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.

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

[HUMTECH]

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.