backup camera and check engine light blinking and clicking 2015 silverado lt

[werfl]

hello and thanks for any help i can get. about 3 months ago the back up camera was intermittent with a clicking noise left side of cluster as i could tell. so stopped hearing clicking and backup display has been saying service rear camera ever since. starting a couple days ago my check engine light starts flashing intermittently with same clicking sound. noticed when check engine light is on the backup camera started working and when check engine light goes off the camera the camera stops working. any help i can get is most appreciated. without my truck i am dead in the water, and will pay it forward for sure if i can avoid the dealer hourly rate. thanks to all         

[richard wysong]

As always check for codes FIRST

[werfl]

Hi and thanks for all the help. The error code is P0650. Guy who used code reader said it is a possible short or grounding issue with I believe he said was a module. Thanks for any advice I can get.it is much appreciated

[asilverblazer]

DTC P0650 or DTC P263A

The ECM detects low voltage during the MIL control circuit driver OFF state. This indicates either a shorted to ground or an open MIL control circuit.

 

gmupfitter has wiring diagrams to reference. Looks like you need to start looking for damaged wiring in the MIL circuit. It seems that the MIL circuit is damaged/pinched with the camera circuit.

 

 

Edited January 30, 2024 by asilverblazer

[werfl]

Thanks much blazer any idea where to start looking like under the fuse box in engine compartment. I think that's where the ecm is located. Thanks again

[werfl]

A person I was talking to about it said the camera wire runs along the floor board under the sill plate

[asilverblazer]

I would start with the MIL circuit - it isn't going to running all over the truck. Start at the instrument cluster and work backwards. 

 

The diagrams can be complex to follow: you'll get a wire colors and connectors, find the connector location (listed separately in the diagrams) to know where to look.

[asilverblazer]

Diagnostic Aids

• If the condition is intermittent, move the related harnesses and connectors while monitoring the scan tool MIL control circuit status parameters. Perform this test with the ignition ON and the engine OFF, and with the engine running. The MIL control circuit status parameters change from OK or Not Run to Malfunction if there is a condition with a circuit or a connection.
• If the ECM detects low voltage on the MIL control circuit during the control circuit driver OFF state, DTCs P0650 and DTC P263A may set simultaneously.

Circuit/System Testing

1. Ignition OFF.
2. Disconnect the X1 harness connector at the K20 Engine Control Module.
3. Ignition ON, verify the malfunction indicator lamp does not illuminate.
   • If the malfunction indicator lamp illuminates
    
   1. Test for infinite resistance between the control circuit terminal X1 46 and ground.
      • If less than infinite resistance, repair the short to ground in the circuit.
      • If infinite resistance, replace the P16 Instrument Cluster.
      
      
       
    
   • If the malfunction indicator lamp does not illuminate
   
   
4. Connect a 3 A fused jumper wire between the control circuit terminal X1 46 and ground.
5. Verify the malfunction indicator lamp illuminates.
   • If the malfunction indicator lamp illuminates
     Replace the K20 Engine Control Module.
   • If the malfunction indicator lamp does not illuminate
    
   1. Test for less than 1 V between the control circuit terminal X1 46 and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
       
      • If less than 1 V
      
      
   2. Ignition OFF.
   3. Test for less than 2 Ω in the control circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
       
      • If less than 2 Ω.
      
      
       
6. Ignition OFF, disconnect the harness connector at the instrument cluster.
7. Ignition ON, verify a test lamp illuminates between the ignition voltage circuit terminal 8 and ground.
   • If the test lamp does not illuminate and the circuit fuse is open
    
   1. Ignition OFF.
   2. Test for infinite resistance between the ignition voltage circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      
      
       
    
   • If the test lamp does not illuminate and the circuit fuse is good
    
   1. Ignition OFF.
   2. Test for less than 2 Ω in the ignition voltage circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      
      
       
    
   • If the test lamp illuminates
   
   
8. Replace the P16 Instrument Cluster.

[asilverblazer]

Chart indicates either wiring fault, instrument cluster or ECM. 

 

Instrument cluster and ECM failure is rare. Check the wiring, connectors and pins in the connectors. Also check all the grounds, poor grounding is very common.