Circuit Open/Short Inspection - Mazda MX-5 Miata Sport 2007 Manual

1. Remove the battery cover.
2. Remove the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [LF] .)
3. Disconnect the KS connector.
4. Measure resistance between KS terminals A and B.
If not within the specification, replace the KS. (See KNOCK SENSOR (KS)

REMOVAL/INSTALLATION [LF] .)
If the monitor item status/specification (reference) is not within the specification, even though the

KS resistance is within the specification, perform the CIRCUIT OPEN/SHORT INSPECTION.
KS resistance
Approx. 4.87 megohms

CIRCUIT OPEN/SHORT INSPECTION

1. Disconnect the PCM connector.
2. Inspect the following wiring harnesses for an open or short circuit. (Continuity inspection)
Fig. 72: Identifying Knock Sensor Harness Side Connector
2007 Mazda MX-5 Miata Sport
2007 ENGINE PERFORMANCE Engine Control System - MX-5 Miata