FIXES OF THE WEEK

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Posted Fix Information

ASIAN FIX
Posted By: QD Automotive, Duc Truong
Problem Description:
After the vehicle has been driven 30 to 40 minutes into a road trip, the navigation and backup camera would stop working, even...
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Posted Date:
09/30/2014
Confirmed Fix:
Programmed Navigation Control Unit
Problem Description:
After the vehicle has been driven 30 to 40 minutes into a road trip, the navigation and backup camera would stop working, even when the transmission is in Reverse. The radio still works but the touchscreen will not respond to any interaction. The customer would then turn off the engine, restart it and everything would return to normal until the vehicle was driven 30 to 40 minutes again.
The Techstream picked up the following DTC: +U0100: Lost Communication with ECU, +U0129: Lost Communication with ECU, and +U0155. Safety Recall: No Pending Recalls.
Checked CAN, wiring, NAV unit and found no issues.
The repair turned out to be updating the Navigation Firmware (not the MAP data) using special tools from Lexus (Part # is 02005-Denso-13A.) Please refer to TIS for current special tools since this is basically a USB stick with software stored on it that would then be connected with the car’s USB port for software installation. This process took about an hour to complete.
Vehicle Description:
2013 Lexus RX350 Base 3.5L
Category:
Chassis Electrical 
   Entertainment System
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EUROPEAN FIX
Posted By: Acutech Autos, Inc. , Niki Tan
Problem Description:
A previous technician had attempted to resolve a misfire by attempting to remove and replace individual coil tubes on each bank...
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Posted Date:
12/19/2014
Confirmed Fix:
Replaced Bank 2 Ignition Control Module Assembly
Problem Description:
A previous technician had attempted to resolve a misfire by attempting to remove and replace individual coil tubes on each bank of coils. The result was internal damage to the coil packs.
The left side coil pack was replaced with a new part and that resolved the misfire for cylinder 7-12. The engine ran better but still reported a misfire on cylinders 1-3 via the MIL. The fuel system was stuck in fault mode.
A manual test of the right side coil pack by removing and checking individual spark tubes with an analogue test light revealed #1 cylinder not firing at all.
Used a Dremel tool to remove a section of the plastic covering #1 cylinder plug A. This revealed the 3-wire feed to the transistor for #1A was twisted and broken. A continuity check with an ohmmeter showed an open circuit for 2 of the 3 wires. Re-soldered the wires and rechecked with a test light. With engine running, cylinder #1A tube now fires.
JB welded the plastic piece back on the coil pack and then replaced the red spark boots.
Be sure to confirm voltage at each coil pack connector from the main ignition unit. You should have ~180v, ~25v, and ~13v between pins 8 and 16, 8 and 15, and 8 and 14 respectively.
Vehicle Description:
2001 Mercedes-Benz S600 Base 5.8L
Category:
Engine Performance 
   Misfire, Buck, Jerk
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GM FIX
Posted By: J & S Auto Works Inc, Stuart Daniel
Problem Description:
There is a strange noise/buzzing/heat shield type of vibration that only happens when shifting the transmission into and out of...
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Posted Date:
10/11/2014
Confirmed Fix:
Repositioned Transmission Cooler Hose/Line
Problem Description:
There is a strange noise/buzzing/heat shield type of vibration that only happens when shifting the transmission into and out of 5th gear on light throttle applications. Give it too much or not enough throttle and there is no noise. The noise cannot be duplicated on a hoist or in the service bay. The sound only lasts for ½ second or so. At times the noise appears to be coming out of the instrument cluster.
Upon further investigation of the underside of the vehicle, it was noticed that the upper transmission cooler line was contacting the transmission pan and the lower transmission cooler line was contacting the frame’s cross member.
Placed the cooler lines in their proper location and zip tied them in place.
Road tested the vehicle again and the noise is gone.
Vehicle Description:
2007 Chevrolet Silverado 2500 HD WT 6.6L Vin 6
Category:
Engine Mechanical 
   Noises, Vibrations, Odors 
Steering and Suspension 
   Noises or Vibrations 
Transfer Case/4WD 
   Noises or Vibrations 
Transmission (Automatic) 
   Noises or Vibrations
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CHRYSLER FIX
Posted By: Danvers Auto Engineering, Tom Elliott
Problem Description:
This vehicle came to the shop with a complaint of erratic gauge operation, heater blower fan inoperative, windshield wipers...
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Posted Date:
12/16/2014
Confirmed Fix:
Repaired Ground G200
Problem Description:
This vehicle came to the shop with a complaint of erratic gauge operation, heater blower fan inoperative, windshield wipers inoperative and the power locks and windows inoperative.
The front parking lamps and turn indicators in the dash are staying on.
There is intermittent communication loss to the Instrument Panel (I/P) cluster and Body Control Module (BCM).
Found the ground stud for G200 rusted off the floor pan, but resting in place causing the intermittent ground condition. The ground is located under the console in the area of the cup holder, right behind the shifter bracket on the driver’s side.
Vehicle Description:
2004 Jeep Grand Cherokee Special Edition 4.0L Vin S
Category:
Chassis Electrical 
   Power Locks/Keyless Entry 
   Power Windows 
   Wiper/Washer 
Heating, Ventilation, and Air Conditioning 
   Blower Motor
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FORD FIX
Posted By: Tidewater Auto Electric, Mike Collins
Problem Description:
The engine would not shut off with the key. The customer was shutting it off by removing the air intake hose. Followed power...
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Posted Date:
11/18/2014
Confirmed Fix:
Repaired Wiring Harness Near Left Front Headlight
Problem Description:
The engine would not shut off with the key. The customer was shutting it off by removing the air intake hose. Followed power distribution and found fuse 2.8 staying hot with the ignition key in the “OFF” position. Removed the fuse and found battery voltage back feeding onto circuit 16 (RD/LG). Behind the driver’s headlamp, we found the front end wiring harness had a pretty good sag in it. This allowed water to accumulate inside of the conduit surrounding the harness. We cut open the conduit and water started to drain out. The wiring inside was rotten, rusted and corroded. Repaired all of the bad wires and the back feed went away. We then removed the bumper and repaired and secured the wiring harness to prevent any further sagging. The vehicle has been repaired.
Vehicle Description:
2003 Mercury Marauder Base 4.6L
Category:
Chassis Electrical 
   Other Chassis Electrical Problems 
Engine Performance 
   Ignition System Diagnosis 
   Starting
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