Battery Current Sensor

Reconnect harness connectors disconnected.
Disconnect battery negative cable.
Install jumper cable between battery negative terminal and body ground.

Fig 1: Installing Jumper Cable Between Battery Negative Terminal And Body Ground
Courtesy of SUZUKI OF AMERICA CORP.
Turn ignition switch ON.
Check voltage between ECM terminal 71 (battery current sensor signal) and ground.

Fig 2: Checking Voltage Between ECM Terminal 71 (Battery Current Sensor Signal) And Ground
Courtesy of SUZUKI OF AMERICA CORP.

Voltage: Approximately 2.5V
If NG, replace battery negative cable assembly.