ISC Valve

Disconnect ISC valve electrical connector. Connect ohmmeter to Idle Speed Control (ISC) valve 2-wire connector. Measure resistance. See ISC RESISTANCE SPECIFICATIONS table. If resistance is not within specification, replace ISC valve.

ISC RESISTANCE SPECIFICATIONS

Application	Testing Temperature: °F (°C)	Ohms
B2200, B2600i & MPV 2.6L	73 (23)	7.7-9.3
MPV 3.0L, MX-3 & 929	68 (20)	10.7-12.3
MX-6 & 626	73 (23)	6.3-9.9

Fig 1: Testing Air Valve (B2200, B2600i, MPV 2.6L, MX-6 & 626)

Courtesy of MAZDA MOTORS CORP.

Fig 2: Testing Air Valve (MPV 3.0L & 929)

Courtesy of MAZDA MOTORS CORP.

Fig 3: Identifying Diagnostic Connector Terminals (MX-3)

Courtesy of MAZDA MOTORS CORP.