Infiniti No Crank/Inoperable Instrument Cluster/Shorted CAN/ICC Sensor - ADAS Target

David Owner Metter, Georgia Posted   Latest   Edited  
Case Study
Autonomous Vehicles
Network Communications
2007 Infiniti QX56 5.6L (VK56DE) 5-spd (RE5R05A)
No Crank / No Start
Electric Cooling Fan Runs At All Times
Inoperable Instrument Cluster
No Communication

This Infiniti randomly would not crank for the customer. Sometimes it would crank and start but then a bit later the instrument cluster would quit operating correctly. The gauges would fall to zero and many of the indicator lights would turn on or flash. The customer had first take it to the dealer. After they replaced the IPDM and the BCM for no communication with no change in operation the customer opted to decline further repairs and brought the vehicle to our shop. The dealer did reinstall the original IPDM and the BCM before releasing the vehicle to the customer.

When the vehicle arrived here it did crank and start for us but very soon the instrument cluster acted up. Gauges went to zero and indicator lights turned on. I tried operating the turn signals and the high beams and neither indicator showed on the instrument cluster. These symptoms immediately suggested a failure/shortage in the CAN network system. With the engine still running and problem present I checked my voltages on pin 6 and 14 of the DLC and found near 0 volts on both pins. Next I attached my oscilloscope and found a very incoherent signal that centered near 0 volts on both traces.

CAN High and Low showing network shorted to near 0 volts.

I left the vehicle running because I did not want it to suddenly fix itself before I pinpointed the shortage. The A/C was also inoperable at this time. I soon discovered that the electric cooling fan was disconnected and was likely left like that by the dealer ... they likely had it disconnected during their diagnosis so as not to drain the battery. I plugged in the cooling fan and sure enough the cooling fan turned on and ran all the time. I looked up a network diagram to decide a plan of attack. One thing I noticed was that the ICC (Intelligent Cruise Control) control unit, and the ICC sensor were both on the CAN network. A search on Identifix listed the ICC sensor as a common culprit of network shortages and the symptoms I was experiencing.

ICC control unit and ICC sensor on CAN

The ICC sensor is located in the front bumper cover opening towards the right hand side of the vehicle. It was very simple to reach the connector from the backside of the bumper cover at the front right wheel well. The ICC sensor simply has a power and ground and CAN high and CAN low wires going to it. As soon as I disconnected the ICC sensor the electric cooling fan shut off and the A/C engaged and started cooling. The instrument cluster was operating correctly and turn signal and high beam indicators operated with those operations. My CAN high and low voltages and signals also returned to normal as seen in the next scope capture. Both wires were now near 2.5 volts.

Normal CAN high and Low

I plugged the ICC sensor back in duplicated the symptoms all over again. I did that a few times to be sure that was the only issue. I load tested the power and ground to the ICC sensor and they tested OK. This diagnosis is complete and I concluded that we need to perform a wheel alignment, replace the ICC sensor, and reset the steering angle sensor, and perform the Laser beam aiming procedure for the ICC sensor. These items need performed to return the Adaptive Cruise Control system and the vehicle to a safe operating condition.

I was rather surprised to find Adaptive Cruise Control on this old of a vehicle. I have reviewed the OEM procedure for performing the Laser beam aiming of the ICC sensor on this vehicle and feel that I have an understanding of the correct procedure. I also verified that my scan tool is capable of performing the Laser beam aiming procedure in the ICC control module. My only problem is that I do not have the target needed to perform this procedure. The newer Nissan's/Infiniti's simply use either a shiny aluminum plate or a mirror correctly positioned in front of the vehicle for the target. The picture that I found of this target is show in the picture below.

Infiniti ICC Laser beam aiming target

I thought I would ask for any input on where I could get one of these targets. I went to the Nissan Tech-mate sight and they showed to be out of stock with a delivery time of a few months from now. Or maybe some of you have had experience simply using the mirror or aluminum target on this older 2007 model? I likely will not need the target for a while once this vehicle is through ... so maybe someone nearby has one I could borrow or maybe one of the nearby mobile techs that does ADAS calibrations would have the correct target. I appreciate your consideration and input.

Regards

+6
Paul Technical Support Specialist
Lafayette, Colorado
Paul Default
   

Hi David! Nice job on that diagnostic! Did you know we have stock of OE targets for ADAS? From Beissbarth, who manufactures them and sells them to Bosch. We currently have stock in California. We are also starting a big update for our website tomorrow that will show shops that they can buy OE targets from a German OE source for around the same price as that Autel stuff.

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David Owner
Metter, Georgia
David Default
 

I thought I would post the specific part number of the target assembly here as well as a picture/parts breakdown of it. The part number is J-45718 Also attached is a list of vehicle applications it is used for. Target board assembly breakdown J-45718 Photo of target board and assembly Vehicle application list for J-45718

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David Owner
Metter, Georgia
David Default
 

We found an Infiniti Dealer 1.5 hr away that had the correct target. We drove the vehicle to them and they performed the ICC sensor laser beam aiming procedure. The basic cruise control and the adaptive cruise control both worked properly after the aiming procedure. The basic cruise control would not work before the aiming procedure was done. It was also setting a code saying the laser beam…

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Timothy Owner/Technician
Metter, Georgia
Timothy Default
 

After the vehicle was repaired I decided to disassemble the ICC sensor to see how it was made and what went wrong with it. The pictures show the culprit. With all that water, rust, and corrosion it is no surprise the the CAN network was shorted out by this module. Notice the small motor/lever that mates into the clearish panel ... it appears that this panel is adjustable side to side with that…

+3
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Jimmy Analyst
Québec, Quebec
Jimmy Default
 

I would be interested in including this case study with your photos in an automotive textbook by author Jim Halderman. I'm doing research for him and we'd love to include it. Would that be okay? You can email me at … if it's okay. We'd give you a mention in the book for providing us with this.

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