MY CAR JUST DISCONNECTED WITH SCAN TOOLS

1997 Jeep Grand Cherokee

Tiny

Fuchen

March, 4, 2012 AT 7:03 AM

My jeep drives good. Everthing works good.
But the engine light sometimes on sometime off
I just installed an new computer but still disconnect with scan tools
Does someone can help

5 Answers

Tiny

KHLow2008

March, 4, 2012 AT 7:50 AM

If you cannot communicate with the ECM, it could be a fault with the power supply to the DLC. Ensure you have battery voltage at pin # 16.

Tiny

Fuchen

March, 6, 2012 AT 9:16 AM

Thank u for helping me?I just checked the DLC the pin#16 is working but still disconnect with scan tools can u please help me again thanks

Tiny

KHLow2008

March, 6, 2012 AT 12:53 PM

Pin # 4 is ground, ensure it has continuity to body ground.

Check the ground circuits for the engine and computer.

Tiny

Fuchen

March, 6, 2012 AT 6:30 PM

Yesterday I checked the DLC but just pin#16 have power the other 7
have no power

Tiny

KHLow2008

March, 7, 2012 AT 12:20 PM

Which engine do you have?

What did you use to check the DLC? You must only use a DVOM to test.

Pin # 16 has battery voltage.
Pin # 4 is body ground, you would not gat any power there.
Pin # 3 is CCB (+)

Please login or register to post a reply.

Code Read Retrieval/Clear - Dodge Stratus
Code Read Retrieval/Clear
 Step by Step video GMC Yukon XL 2000-2006
Read Codes Like a Pro
How to read codes Chevrolet Blazer
Code Read Retrieval/Clear Chevrolet Camaro
Code Read Retrieval/Clear Mercedes Benz