I have a '14 QX80 and while on a trip towing my boat, the BCI malfunctioned and threw up a lot of yellow lights on the cluster including IBA, ABS, 4WD(shortly after startup) BSW and VDC.
I pulled the codes and I'm not quite sure what to make of them as a whole due to not having access to the Consult hardware. To verify no existing codes, I disconnected the battery overnight and the following codes were logged on startup the next day.
- I think the right rear wheel sensor may be the culprit for many of these codes but without reading the live data, it's just a guess. I did check the resistance of both rear wheel sensors and the right one did have a higher resistance (I can't remember the exact numbers at the moment) but I'm not convinced that is the issue. The resistance on the harness was the same for the left and right side.
- When the car first starts up, the cluster LCD shows the 4WD system changing ranges. (auto, low, high). It seems like a issue with the knob or other electrical but could erroneous wheel sensor data make the car try to switch 4wd mode?
- Apparently, the Adaptive headlights are not working. Probably not related.
If anyone could share some first hand knowledge of either further diagnostics or obvious issue, it would be much appreciated!
Also, are there any suggestion for a scan tool to read more data that isn't ridiculously expensive?
Here's the codes:
============1==============
C1118(00)
Raw code: 511800
ECU: ABS control unit
Status: Test failed, Confirmed
============2==============
C1101(00)
Raw code: 510100
ECU: ABS control unit
Status: Test failed, Confirmed
Infiniti: ABS Hydraulic Valve Circuit Failure
============3==============
P1808
Raw code: 1808
ECU: All wheel drive system (AWD/4WD)
Status: Validated fault has been present during this drive cycle
OBDII: Transmission 4-Wheel Drive Low Indicator Circuit Failure
Infiniti: Transmission 4-Wheel Drive Low Indicator Circuit Failure
============4==============
P1830
Raw code: 1830
ECU: All wheel drive system (AWD/4WD)
Status: Validated fault has been present during this drive cycle
OBDII: Transmission Transfer Case Counter Clockwise Shift Relay Coil Short Circuit To Battery
Infiniti: Transmission Transfer Case Counter Clockwise Shift Relay Coil Short Circuit To Battery
============5==============
U1000
Raw code: D000
ECU: Adaptive headlights
Status: Pending fault present, Pending fault present during this driving cycle, Test conditions are met, Validated and stored in non volatile memory, Validated fault has been present during this drive cycle
OBDII: Class 2 Communication Malfunction
Infiniti: SCP (J1850) Invalid or Missing Data for Primary Id
============6==============
C1A26(00)
Raw code: 5A2600
ECU: Adaptive cruise control
Status: Test failed, Test failed (current drive cycle), Confirmed
============7==============
C1A04(00)
Raw code: 5A0400
ECU: Adaptive cruise control
Status: Test failed, Test failed (current drive cycle), Confirmed
============8==============
C1A03(00)
Raw code: 5A0300
ECU: Adaptive cruise control
Status: Test failed, Test failed (current drive cycle), Confirmed
============9==============
C1B01(00)
Raw code: 5B0100
ECU: Adaptive cruise control
Status: Test failed (current drive cycle), Confirmed
============10==============
C1A50(00)
Raw code: 5A5000
ECU: Lane-keeping assist
Status: Test failed, Test failed (current drive cycle), Confirmed
============11==============
C1A50
Raw code: 5A50
ECU: Intelligent brake assist
Status: Validated fault has been present during this drive cycle
