TERMINALS OF ECU ![]() 1. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY, MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (a) Remove the main body ECU (multiplex network body ECU) from the driver side junction block assembly. Click here (b) Connect the driver side junction block assembly connectors. (c) Measure the voltage and resistance according to the value(s) in the table below.
(d) Install the main body ECU (multiplex network body ECU) to the driver side junction block assembly. Click here (e) Measure the voltage and check for pulses according to the value(s) in the table below.
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Toyota Tundra Service Manual > Sfi System: Evaporative Emission Control System Incorrect Purge Flow (P0441)
DTC SUMMARY DTC No. Monitoring Item Malfunction Detection Condition Trouble Area Detection Timing Detection Logic P0441 Purge VSV (Vacuum Switching Valve) stuck open Leak detection pump creates negative pressure (vacuum) in EVAP system and EVAP system pressure measured. Reference pressure measured a ...