I bought a used rover that was on the bump stops. I plugged up the iidtool and it gives me this suspension error c1a55-01. When trying to raise the vehicle the display reads suspension error, "start engine to raise vehicle even though it's running. I found a post here https://www.justanswer.com/australia-car/a...rover.html explaining that it could be a bad ecu or wiring problem, but no other info anywhere on the web. I'm wondering if anyone has experience with this fault or am I stuck taking it to the dealer.

Check the battery voltage with the engine running. I assume that you attempted to raise using the raise switch rather than the iidtool and therefore the suspension ecu displayed the message when you pressed the raise switch.

The codes were taken with engine running. Just now, I scanned all the codes. Voltage was 12.0v. Here's the list... It looks like there's some wiring issue. The front bumper concert and headlights are disconnected. The brake lights work though.


VIN SALMF13476A201619
Model L322 - Range Rover 2006
Vehicle scanned on Sep 25, 2020 8:50:05 AM
IIDControl 2.9.9.7 Build 71 Android - IIDTool BT V4.0 B2691

AAM-Audio Amplifier

B1A05-13 (2F) Speaker 5 circuit - General electrical failure - circuit open
( on 24-09-2020 19:36:45 at 114936 mi )

BPM-Body Processor

0xB4 Body Control Unit in transportation mode

0x7E Sunroof switch or connections defective

0x51 Body Control Unit unlock relay short to ground

0x55 Body Control Unit superlock relay short to ground

0x81 Servo-valve or connections short circuit

0x80 Servo-valve or connections open circuit

0x38 Open circuit activation SRA, DRM 2

0x31 Wiper motor blocked, park switch or wiper relay defective

0x56 Body Control Unit upper tailgate unlock relay short to battery

0x53 Body Control Unit lock relay short to ground

0x40 Interior lights open circuit

0x2 Interior lights fuse defective

0x0001 Unknown

0x49 Wiper enable relay: open circuit

0x4B Wiper speed relay: open circuit

0x30 Wiper switch potentiometer defective

0x7E Sunroof switch or connections defective

0x51 Body Control Unit unlock relay short to ground

DSM-Driver Seat

0x11 Steering column radial motor - transmission error

0x12 Steering column radial motor - short circuit

IPC-Instrument Pack

B1A68-15 (2F) Ambient temperature sensor circuit - General electrical failure - circuit short to battery or open
( on 24-09-2020 18:28:52 at 114936 mi )

U2016-41 (2F) Control module main software - System internal failure - general checksum failure
( on 24-09-2020 18:45:00 at 114936 mi )

U0400-68 (2F) Invalid data received (event diagnostic trouble code) - Algorithm based failure - event information
( on 24-09-2020 18:28:58 at 114936 mi )

U0248-87 (2F) Lost communication with remote driver utility module - Bus signal/message failure - missing a message
( on 24-09-2020 18:28:54 at 114936 mi )

U0127-87 (2F) Lost communication with tire pressure monitor module - Bus signal/message failure - missing a message
( on 24-09-2020 18:28:54 at 114936 mi )

LCM-Light Control

0xD Redundant inputs contradiction fault

0x003C Unknown

0x003D Unknown

0x54 Coolant temperature fault

0x5A Brake pad fault

0x5B Washer fluid level fault

0x5F Check coolant fault

0x78 Left dip beam headlight defective

0x79 Right dip beam headlight defective

0x7A Front left sidelight defective

0x7B Front right sidelight defective

0x7C Front left direction indicator defective

0x7D Front right direction indicator defective

0x7E Front right foglight defective

0x7F Front left foglight defective

0x80 Left high beam headlight defective

0x81 Right high beam headlight defective

0x8C Left tail light defective

0x8D Right tail light defective

0x90 Rear left direction indicator defective

0x91 Rear right direction indicator defective

0x92 Rear left foglight defective

0x93 Rear right foglight defective

0x99 Licence plate lights defective

PAM-Parking Aid

0x0001 Unknown

0x6 Front right ultrasonic sensor

0x7 Front centre left ultrasonic sensor

0x8 Front centre right ultrasonic sensor

PCM-Engine Petrol

P0071-00 (AA) Ambient air temperature sensor range/performance

U0424-81 (AA) Invalid data received from heating, ventilation and air conditioning control module - Bus signal/message failure - invalid serial data received

RLM-Suspension

C1A55-01 (6C) Ignition switch input circuit - General failure information - general electrical failure
( on 24-09-2020 18:29:24 at 114936 mi )

TCCM-Transfer Case

U0155-87 (2F) Lost communication with instrument cluster control module - Bus signal/message failure - missing a message
( on 24-09-2020 18:28:54 at 114936 mi )

TEL-Cell Phone

B1A00-47 (AF) Control module - System internal failure - watchdog/safety failure

U3000-54 (EC) Control module - System programming failure - missing calibration
( on 24-09-2020 20:05:32 at 114936 mi )

VIM-Immobilizer

B1B01-87 (2E) Key transponder - Bus signal/message failure - missing a message
( on 24-09-2020 19:36:25 at 8452160 mi )

That's quite a list of errors!

I suspect a lot of them are likely to be historical and can be cleared. Some of the "communication" type errors can be down to a flat battery and can also be cleared.

I would clear everything down and let it re-scan. I suspect a lot of them won't reappear.

I would add that you can't raise the car until the engine is running. Got - 2017 SDV8 Autobiography in Loire Blue
Had- 2008 TDV8 Vogue SE in Java black
Had - 2007 S/C in Stornoway Grey

Hi,

If it’s anything from that list of errors it’s the transportation mode. Given the age of the vehicle I would have thought it would have had its transportation mode error removed by now, but then again it is JLR

Try as Alan said and clear down the errors, if transportation mode is still there take it out of transportation mode using the IIDtool and hopefully all will be well  ______________________________
Simon
______________________________

Range Rover Classic 3.5 efi - Gone
Range Rover Classic 3.9 efi - Gone
Range Rover Classic 4.2 LSE - Sadly gone
Land Rover 110 3.5 - Gone
Range Rover P38a 4.0 SE - Pleased it's gone
Range Rover P38a 2.5 DHSE - Just sold
Range Rover L322 4.4 v8 Petrol - Current

Just installed a new battery. Also, an engineer at Gap suggested I check the voltage on the ignition switch. I did that, and all 3 large wires and the red/purple small wire were at 14v with the switch in the on position. The small wire that starts the engine is only on when the engine is running. So I don't think it's the switch.

Last edited by gopher_tortoise on 26th Sep 2020 9:02pm. Edited 1 time in total

Thanks for the suggestions. I enabled transport mode when trying to debug the suspension and forgot to disable it. I disabled it, cleared codes, restarted the car and I'm still left with this. Suspension control doesn't work.

VIN SALMF13476A201619
Model L322 - Range Rover 2006
Vehicle scanned on Sep 26, 2020 1:00:06 PM
IIDControl 2.9.9.7 Build 71 Android - IIDTool BT V4.0 B2691

BPM-Body Processor

0x49 Wiper enable relay: open circuit

0x4B Wiper speed relay: open circuit

0x38 Open circuit activation SRA, DRM 2

IPC-Instrument Pack

B1A68-15 (2F) Ambient temperature sensor circuit - General electrical failure - circuit short to battery or open
( on 26-09-2020 12:55:31 at 114936 mi )

U2016-41 (2F) Control module main software - System internal failure - general checksum failure
( on 26-09-2020 12:57:24 at 114936 mi )

U0400-68 (2F) Invalid data received (event diagnostic trouble code) - Algorithm based failure - event information
( on 26-09-2020 12:59:15 at 114936 mi )

U0248-87 (2F) Lost communication with remote driver utility module - Bus signal/message failure - missing a message
( on 26-09-2020 12:58:32 at 114936 mi )

U0127-87 (2F) Lost communication with tire pressure monitor module - Bus signal/message failure - missing a message
( on 26-09-2020 12:58:32 at 114936 mi )

LCM-Light Control

0x5B Washer fluid level fault

0x7C Front left direction indicator defective

0x7E Front right foglight defective

0x7F Front left foglight defective

0x8D Right tail light defective

0x92 Rear left foglight defective

PAM-Parking Aid

0x0001 Unknown

0x6 Front right ultrasonic sensor

0x7 Front centre left ultrasonic sensor

0x8 Front centre right ultrasonic sensor

PCM-Engine Petrol

P0071-00 (E Ambient air temperature sensor range/performance

U0424-81 (E Invalid data received from heating, ventilation and air conditioning control module - Bus signal/message failure - invalid serial data received

RLM-Suspension

C1A55-01 (AF) Ignition switch input circuit - General failure information - general electrical failure
( on 26-09-2020 12:59:01 at 114936 mi )

TCCM-Transfer Case

U0155-87 (2F) Lost communication with instrument cluster control module - Bus signal/message failure - missing a message
( on 26-09-2020 18:10:07 at 114936 mi )

I wouldn't bother chasing any fault codes at this time, instead probing with a voltmeter looking for a bad connection, checking earths and power spots in the engine bay fuse box for starters for where the voltage drops off from the battery voltage. You may find a loose connection on a mega-fuse or a blown fusible link.

Sorry I meant to write 14v, not 4v.

I should also mention that the previous owner replaced the carpeting and steering wheel sensor.

So not a major voltage problem....

Maybe check for connectors in the vicinity of the steering column that may have been dislodged when the carpet was replaced.

I fixed a few other issues and paired the error list down issues that aren't clearly broken parts. Here's the list now. Hopefully this will lead me to a location to check for a specific module or connection.


On Sat, Sep 26, 2020, 7:48 PM Bryan Davis <bryan631> wrote:


VIN SALMF13476A201619
Model L322 - Range Rover 2006
Vehicle scanned on Sep 26, 2020 7:47:59 PM
IIDControl 2.9.9.7 Build 71 Android - IIDTool BT V4.0 B2691


IPC-Instrument Pack

U2016-41 (2F) Control module main software - System internal failure - general checksum failure
( on 26-09-2020 19:48:41 at 114936 mi )

U0400-68 (2F) Invalid data received (event diagnostic trouble code) - Algorithm based failure - event information
( on 26-09-2020 19:43:33 at 114936 mi )

U0248-87 (2F) Lost communication with remote driver utility module - Bus signal/message failure - missing a message
( on 26-09-2020 19:43:26 at 114936 mi )

U0127-87 (2F) Lost communication with tire pressure monitor module - Bus signal/message failure - missing a message
( on 26-09-2020 19:43:26 at 114936 mi )


RLM-Suspension

C1A55-01 (AF) Ignition switch input circuit - General failure information - general electrical failure
( on 26-09-2020 19:42:19 at 114936 mi )

TCCM-Transfer Case

U0155-87 (2F) Lost communication with instrument cluster control module - Bus signal/message failure - missing a message
( on 26-09-2020 19:43:26 at 114936 mi )

TEL-Cell Phone

B1A00-47 (AF) Control module - System internal failure - watchdog/safety failure

U3000-54 (EC) Control module - System programming failure - missing calibration
( on 26-09-2020 20:11:22 at 114936 mi )

VIM-Immobilizer

B1B01-87 (2C) Key transponder - Bus signal/message failure - missing a message
( on 26-09-2020 19:26:34 )

I don't have a wiring diagram for pre MY07 when Terrain Response was introduced although I'm unsure about your vehicle which I understand has an e-diff which for MY07+ requires TR. MY07+ suspension module has an ignition feed via a 5A fuse in the central junction box so I'd check your fuse chart to see if a 5A suspension system fuse exists. If it does and the fuse isn't blown, is there good voltage at the fuse when probed through the top of the fuse? MY07+ suspension modules have 4 connectors whereas the earlier ones had a long single connector. The suspension module is located under the left end of the facia with the connectors on the bottom edge.

For MY07+ and possibly your vehicle too the instrument pack has both medium speed and high speed canbus connections. I wonder if there is a fault with the medium speed canbus or with a device attached to it. Does the instrument cluster appear to work?

I believe it has a locking center diff, but the rear diff is open. I also understand that most of the interior electronics are shared with 03-05 and the powertrain is shared with 07-09. Most things on the car work--immobilizer, instrument cluster, radio, lights, windows, HVAC, transfer case switch, and even the 4wd page and height sensor read out. The only problem I've noticed is that adjusting the suspension gives error about the car not running, but of course that's a serious problem! I took apart the center console and removed the glove box and it had been taken apart before by someone who didn't care about putting all the screws back. And the wiper relay was loose so I pushed it up. Point being that it seems likely to me that someone with a weak commitment to quality could have failed to put some connector on properly. Gap had been helping me some off hours, but hopefully they can help some more then they are back at the office.

I'll try finding the fuses and ECU probably later tomorrow or Monday night, thanks for the input.

I had in mind that all 4.2SC had the rear e-diff but that clashed with what I know about the e-diff control in MY07+. If yours doesn't have the rear e-diff then it must be that all MY07+ 4.2SC have the rear e-diff whereas it was optional for other MY07+ engines.

I have the wiring schematic of the pre-TR suspension ecu. It does not have an ignition supply as such, only a 15A permanent supply and a 50A fuse for the compressor. I see a BCU (body control ecu) connection which must be providing the ignition indication, either as a digital signal or as an analogue signal. Either way, it sounds as though the message from the BCU isn't getting to the suspension ecu. Hence with all the other comms faults I would be looking at the BCU plugs. At this time I have no information on the location of the BCU.