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 > 1ur-fe Charging: Charging System
On-vehicle InspectionON-VEHICLE INSPECTION PROCEDURE 1. CHECK BATTERY CONDITION NOTICE: If the battery is weak or if the engine is difficult to start, perform the following procedures. (a) Check the battery for damage and deformation. If severe damage, deformation or leakage is found, replace the b ...
