Data Link Diagnostic Test

1. Perform New Generation Star Tester Hookup and Vehicle Selection.

NOTE: The ignition switch must be in RUN position or test will fail. This test is used to verify the proper operation of communication circuit of each module on the J1850 communication network or ISO 9141 communication network

2. Rotate dial to menu item "Diagnostic Data Link" and press trigger.
3. If results of Circuit 914 (+) = SYSTEM PASSED and Circuit 915 (-) = SYSTEM PASSED, then the J1850 communication network test passed. If any other display is returned, then go to Communication Systems Diagnostics.
4. If results of Circuit 70 (LB/W) = SYSTEM PASSED, then the J1850 Communication Link Test passed. If any other display is returned, Communication System Diagnostic Notes