Circuit/System Testing

Circuit/System Testing DTC B390F 39, 3C

1. Ignition - On / Vehicle - In Service Mode
2. Replace the component: B174 Front View Camera
3. Verify DTC B390F is not set.
   • If DTC B390F is not set 

     All OK.

   • Go to next step: If DTC B390F is set 
4. Replace the component: K157 Video Processing Control Module

Circuit/System Testing DTC B390F 08

1. Ignition/Vehicle & All vehicle systems - Off
2. Disconnect the electrical connector: X5 @ K157 Video Processing Control Module
3. Wait for greater than 5 s.
4. Connect appropriate EL-52552pinout tool to K157 Video Processing Control Module
5. Ignition - On / Vehicle - In Service Mode
6. Test for 7 to 11 V between the test points: Signal circuit terminal GN @ K157 Video Processing Control Module & Ground (component side)
   • If not between 7 and 11 V 

     Replace the component: K157 Video Processing Control Module

   • Go to next step: If between 7 and 11 V 
7. Ignition/Vehicle & All vehicle systems - Off
NOTE:

Before testing the coax cable, check the cable's exterior for being pinched, cut, damaged, or having loose connections at the components, all of which can cause reception issues.

8. Disconnect the electrical connector: B174 Front View Camera
9. Locate the appropriate pinout adapter and load test loop adapter from EL-52552 COAX FAKRA Cable Adaptor Kit.
10. Connect the 2 adapters together, measure and record the resistance between the terminals at the pinout adapter.
11. Disconnect the 2 adapters and connect each one to the appropriate end of the coax cable.
12. At the pinout adapter test terminals, measure the total resistance of the coax cable loop including the connected load test adapter.
    • If not within 5 Ω of the reading from step 10. 

      Replace the coax cable

    • Go to next step: If within 5 Ω of the reading from step 10. 
NOTE:

If the condition is intermittent or cannot be duplicated, disconnect the connectors and add dielectric grease or lubricant (Nyogel 760G or equivalent, meeting GM specification 9986087). This procedure will correct the high resistance condition due to terminal fretting corrosion.

13. Replace the component: B174 Front View Camera
14. Apply the parking brake.
15. Engine Running Transmission in Reverse
16. Verify DTC B390F is not set.
    • If the DTC is set 

      Replace the component: K157 Video Processing Control Module

    • Go to next step: If the DTC is not set 
17. All OK.

Circuit/System Testing DTC B390F 66, 58, 4B

1. Ignition - On / Vehicle - In Service Mode
2. Operate the vehicle under the following conditions:
   • During the day
   • On a straight road
   • Distance Traveled = Greater than 0.5 km (0.3 mi)
3. Ignition/Vehicle & All vehicle systems - Off
4. Wait for greater than 60 s.
5. Ignition - On / Vehicle - In Service Mode
6. Verify DTC B390F is not set.
   • If DTC B390F is not set 

     All OK.

   • Go to next step: If DTC B390F is set 
7. Test or replace the component: B174 Front View Camera
8. Verify DTC B390F is not set.
   • If DTC B390F is not set 

     All OK.

   • Go to next step: If DTC B390F is set 
9. Test or replace the component: K157 Video Processing Control Module

Circuit/System Testing DTC B390F 53, 54

NOTE:

DTC B390F 53 and 54 can set due to extreme environment temperature conditions and not necessarily due to a camera system defect.

1. Ignition - On / Vehicle - In Service Mode
2. Place vehicle in an area where a ambient temperature is 15 - 25° C (59 - 77° F) with engine OFF.
3. Wait at least 30 minutes.
4. Verify DTC B390F is not set.
   • If DTC B390F is not set 

     All OK.

   • Go to next step: If DTC B390F is set 
5. Replace the component: B174 Front View Camera
6. Verify DTC B390F is not set.
   • If DTC B390F is not set 

     All OK.

   • Go to next step: If DTC B390F is set 
7. Replace the component: K157 Video Processing Control Module