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3. ATTEMPT TO ISOLATE THE OPEN CONDITION — MULTIPLE RED X’S With the scan tool continue monitoring the ECU View screen. Are there multiple red X’s displayed next to CAN B Bus modules? Yes >> The most likely cause of this condition is an open CAN B Bus (+) circuit between a common CAN B Bus splice and the modules that display the red X next to them. Use the wiring diagrams to help you Perform the BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CON- No >> Go To 4 4. (D55) CAN B BUS (+) CIRCUIT OPEN — SINGLE RED X Turn the ignition off. Disconnect the module that has the red X displayed next to it. Turn the ignition on. Measure the voltage between the (D55) CAN B Bus (+) circuit and ground. Is there any voltage present? Yes >> Inspect the connector and terminal for damage, inspect for spread terminals, or pushed out terminals. If ok, replace the module that displayed the red X next to it in accordance with the service information. Perform the BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CON- No >> Repair the (D55) CAN B Bus (+) circuit for an open between the next common splice and the module that has the red X displayed next to it. Use the wiring diagrams to help you determine where the open Perform the BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CON- PM ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS 8E - 19 |