The Japanese car giant currently supply engines to Jordan and British American Racing.

Honda won six successive manufacturers' titles with Williams and McLaren between 1986 and 1991.

But since returning to F1 in 2000 after a seven-year absence, they have not managed a single victory.

And this season they have not scored a point in four races so far.

Ahead of the Spanish Grand Prix in Barcelona, Brawn outlined what he considers to be the reasons for Honda's failure.

"If there is one criticism of their approach it is that they still look like an engine supplier rather than a partner," he said.

"Honda have to look at that if they want to be successful. They have got to get together with a team and become one entity.

'Fabulous partner'

"They need to bite the bullet and go in with a team if they want to achieve the success they had in the past. It's more difficult now.

"We supply engines to Sauber but on a customer basis. We give them as much support as we can, but it does not effect our own F1 effort."

There is speculation that Honda is considering pulling out of its deal to supply engines to Jordan in 2003.