944 S L4-2479cc 2.5L DOHC (1987)
Auxiliary Air Valve (Idle Speed): Testing and Inspection
924 & 944 Models
During normal circumstances, the auxiliary air regulator will be closed when engine is warm and open when the engine is cold.
1.
Disconnect auxiliary air regulator wire connector, then using suitable voltmeter, measure voltage between both terminals. Battery voltage should
be evident.
2.
Using suitable ohmmeter, measure resistance across auxiliary air regulator terminals. Resistance should be 20 - 55 ohms.