Mazda MX-5 Miata Sport 2007 Manual page 1057

Fig. 65: Identifying PCM Harness Side Connector
Courtesy of MAZDA MOTORS CORP.
Open Circuit
If there is no continuity in the following wiring harnesses, there is an open circuit. Repair or replace the

wiring harness.
Front HO2S terminal A and PCM terminal 2AD

Front HO2S terminal B and PCM terminal 2Z

Front HO2S terminal C ignition relay

Front HO2S terminal D and PCM terminal 2BG

Short Circuit
If there is continuity in the following wiring harnesses, there is a short circuit. Repair or replace the

wiring harness.
Front HO2S terminal A and power supply

Front HO2S terminal A and body ground

Front HO2S terminal B and power supply

Front HO2S terminal B and body ground

Front HO2S terminal C and body ground

Front HO2S terminal D and power supply

Front HO2S terminal D and body ground

2007 Mazda MX-5 Miata Sport
2007 ENGINE PERFORMANCE Engine Control System - MX-5 Miata