Diagnostic Trouble Code Definitions

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DIAGNOSTIC TROUBLE CODE DEFINITIONS

DTC ⁽¹⁾

Description

U1016 ⁽²⁾

Loss Of Communications With PCM/VCM

U1026 ⁽³⁾

Loss Of Automatic Transfer Case Control Module Class 2 Communication

U1041 ⁽³⁾

Loss Of EBCM Communication

U1192 ⁽³⁾

Loss Of EVO/Passlock™ Class 2 Communication

U1255 ⁽²⁾

Serial Data Line Malfunction

U1300 ⁽⁴⁾

Class 2 Data Line Voltage Is Low

U1301 ⁽⁴⁾

Class 2 Data Line Voltage Is High

Inter-Device Dedicated Bus Malfunction

⁽¹⁾	Perform appropriate test under DIAGNOSTIC TESTS . Codes listed in this table are only for testing covered in this article. For a complete list of codes, see SELF-DIAGNOSTIC SYSTEM in SELF-DIAGNOSTICS - GASOLINE or SELF-DIAGNOSTIC SYSTEM in SELF-DIAGNOSTICS - DIESEL article.

⁽²⁾	For diagnostic procedures, see DIAGNOSTIC TESTS in appropriate ANTI-THEFT SYSTEMS article.

⁽³⁾	For diagnostic procedures, see SELF-DIAGNOSTIC SYSTEM in SELF-DIAGNOSTICS - GASOLINE or SELF-DIAGNOSTIC SYSTEM in SELF-DIAGNOSTICS - DIESEL article.

⁽⁴⁾	For diagnostic procedures, see DIAGNOSTIC TESTS in BODY CONTROL MODULES - ESCALADE, TAHOE & YUKON DENALI article.