Scania IBU DTC 96745 Negative contactor, incorrectly closed

IBU IBU control unit · Scania

Code 96745 (decimal). Some diagnostic tools show it in hexadecimal as 0179E9.

In short

The contactor to the negative terminal of the propulsion battery is not closed correctly.

Applies to: IBU2 (IBU)IBU2 (IBUA)IBU2 (IBUB)IBU2 (IBUC)IBU2 (IBUD)IBU2 (IBUE)IBU2 (IBUF)IBU2 (IBUG)IBU2 (IBUH)IBU2 (IBUI)IBU2 (IBUJ)IBU2 (IBUK)

What does Scania IBU fault code 96745 mean?

The contactor to the negative terminal of the propulsion battery is not closed correctly.

What causes Scania DTC 96745?

The contactor to the negative terminal of the propulsion battery is defective and locked in the closed position.

How does the system react?

A yellow warning indication is displayed.

What are the symptoms?

Warning! The voltage class B to the negative terminal of the propulsion battery cannot be switched off. Consider the vehicle to be live.

How to fix Scania IBU fault code 96745?

  1. Warning!
  2. The vehicle cannot switch off the class B voltage.
  3. Actions require authorised personnel.
  4. Work on the propulsion battery requires special training.
  5. Regard all voltage class B cable harnesses as supplied with voltage.
  6. The fault indicates that the propulsion battery classification should be category 3:Damaged but not dangerous to handle.
  7. Renew the negative contactor to the propulsion battery.

This information is for guidance only. Always follow the manufacturer workshop manual and safety procedures; if in doubt, contact an authorised workshop.