News Technical Service Bulletins

Honda Troubleshooting Tip

Order Reprints
KEYWORDS Honda Mitchell 1

As you can see, there are at least four power supply circuits connected to the transmission co0ntrol module.

Troubleshooting DTCs for a solenoid or motor power supply circuit failure on Honda? Keep in mind that even though the control unit activates these components, the power supplied may come from a dedicated circuit and its own separate fuse. This is most commonly overlooked when troubleshooting transmission or VTEC solenoid circuits. If the troubleshooting leads you to replace a control unit, make sure you understand and inspect all the power supplies to that control unit first.

Checking for blown, missing or misplaced fuses can be a quick first step that can prevent unnecessary diagnostics.

Generally, solenoid or motor supply circuits will have a label of B+, VB or IG1 to indicate a power supply circuit. SOL or MOTOR is referring to the component being supplied power, but the label itself may not always read this way.

Related Articles

Tip for Odd Electrical Problems for Honda

Honda Shift Position Tip

Honda Navigation Tip

You must login or register in order to post a comment.