Thread: Rear height sensors not communicating

Originally Posted by Discobeaver

Thanks for the loom directions Graeme very helpful. so after unplugging cleaning and testing found that I was getting good supply to the sensors so I tried the old ones again. SUCCESS ! Looks like I made a big mistake there changing all sensors at once. As far as I can figure only one of my front sensors was stuffed originally causing dash warning , I swapped all with the new ones I had for spares but the back 2 don't work (maybe wrong model got all as set from ebay )
End result Suspension working again . YAY . Next the transfer but not till tomorrow, not pushing my luck any further today.
Thanks heaps for the help Very very much appreciated. Had been looking at loom forward from rear sensors but it actually runs to the rear just behing valve block the through floor. Those plugs needed a good clean anyway outsides were caked in dirt.
Thanks again

That's good news on the EAS, are you sure the T/case faults are not to do with the loan module not being coded to the VIN? When I replaced my EAS module it came without the programme, which had to be downloaded from L-R with the VIN code. Granted there are a few EAS differences, Bosch vs AMK1 vs AMK2 compressors, not sure what T/case differences there are though.

I have also been having some suspension fault issues lately 2006 RRS TDV6
Twice over the last two weeks the Suspension icon came on. red with chime and then amber The wife didnt notice any text on message centre
Cleared the warning by stopping and starting ignition. The suspension operates normally apart from sagging in front overnight as usual. Recovers when engine is started
Faultmate showed Loss of comms with ride level U0132 faults to both ABS and instrument modules. The HCAN Terrain module had an invalid data fault from ride levelcontrol module U0421 The Hcan Air suspension ecu has 40 non tested DTC showing intermittent failure of nearly all suspension components

I have cleared the faults and will see how it goes. Im away from my workshop and dont have the full manual but will check connectors as suggested previously in this thread
Am I correct ? Is the suspension ECU, the black plastic module, just forward and to the right of the brake pedal switch

To the right of the accelerator pedal on the side panel

Non-tested DTCs are not errors - they are the codes for possible faults that can be posted by the suspension module if they were to occur.

The suspension module is not a black plastic box - it is aluminium and bolted by 1 top bolt high up on the driver's A pillar with 4 connectors along its bottom edge. A black plastic box could be a Llams module if you bought a used vehicle.

Originally Posted by Tombie

To the right of the accelerator pedal on the side panel

In the light of day the black module I was looking at was the fbw accelerator . Like you and Graeme said the suspension ECU is just to the right of that bolted to the A pillar -thanks
With a bit of contortion and the seat fully back I could see RQT500160 on the label
I will clean and reseat the connectors and see if this intermittent problem goes away

Bit of an update on mine, sorry for the slow reply.
Eas faults all gone , only faults left are,
Transfer Case Incorrect Vin, (second hand module) and
PO806 transfer Case - Cutch position Sensor -circuit range/performance.
Have tested sensor by taking mounting bolts out and turning and testing at module. Volts range from 2.7 to 4.7v so seems to be working.
Also tested range change switch at module all ok.
If I try to calibrate clutch it tries , can here motor running but it still just goes to neutral, have found I can pull motor off and manually get to low range. It doesnt seem to try to energise solenoid while calibrating and that's where it stops.
Tried the old module but gained a few more faults so went back to other.
Pretty much given up now
Thanks for the help , will update when its fixed.
Cheers

Finally transfer working and faults cleared. After many tries at calibrating clutch with no success I tried giving it a fairly firm tap with the 4lb hammer on the housing whilst calibrating clutches with Nanocom. Amazingly it worked ! Fully calibrated and going in and out of Low without a problem. Would seem the range change mechanism inside the box had just stuck.
So after nearly a month of stuffing around a good solid tap got the job done, had tried tapping solenoid and motor a few times with zero success.
Ended up swapping transfer module which also cleared up a couple of HDC etc faults that had a been there for a while. Checking EAS connectors (thanks Graeme) also cleared park sensor faults that I'd been ignoring too.
So after all the playing the olds girl is back better than ever.
Thanks heaps for all the help.
Cheers.