IN–34 INTRODUCTION – HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS (a) Continuity Check with Ground (1) Disconnect connectors (A) and (C) and measure the resistance between terminals 1 and 2 of connector (A) and body ground. In the case of Fig. 6, Between terminal 1 of connector (A) and body ground → Continuity Between terminal 2 of connector (A) and body ground → No continuity (open) Therefore, it is found out that there is a short circuit between terminal 1 of connector (A) and terminal 1 of connector (C). Fig. 6 Sensor C 1 2 B 1 2 A 1 2 ECU BE4068 (2) Disconnect connector (B) and measure the resistance between terminal 1 of connector (A) and body ground, and terminal 1 of connector (B) and body ground. Between terminal 1 of connector (A) and body ground → No continuity (open) Between terminal 1 of connector (B) and body ground → Continuity Therefore, it is found out that there is a short circuit between terminal 1 of connector (B) and terminal 1 of connector (C). Fig. 7 Sensor C 1 2 B 1 2 B 1 2 A 1 2 ECU BE4069