Display 3

Check for faulty CTP switch, intake air leak or faulty IAC valve.

NOTE: In display fields 4 and 5, a value of 0-10 shows a greater learning value than in the engine basic setting (IAC is further open). In engine basic setting, this display value is 0. On older engines with manual transmission, learning value may deviate by as much as 18 points due to a contaminated IAC. This is acceptable. Also, vehicles with automatic transmission and a vacuum pump should be retrofitted with a vacuum booster.