1.CHECK E-SUS CONTROL UNIT GROUND

1. Turn the ignition switch OFF.
2. Disconnect the E-SUS control unit harness connector.
3. Check the continuity between the E-SUS control unit harness connector and ground.

   E-SUS control unit | — | Continuity
   Connector | Terminal
   M110 | 22 | Ground | Existed

Is the inspection result normal?
YES>>GO TO 2.
NO>>Repair or replace an applicable harness or connector.
2.CHECK E-SUS CONTROL UNIT POWER SUPPLY

1. Start the engine.
   ■ CAUTION ■
   Always hold the vehicle stopped.
2. Check the voltage between the E-SUS control unit harness connector terminals.

   E-SUS control unit | Voltage
   Connector | Between terminals
   M110 | 23 – 22 | Battery voltage
   19 – 22

Is the measured value “9.5 V” or less?
YES>>
Check the following items, and repair or replace the malfunctioning parts.

- Open circuit in 15 A fuse (#37)

- Short circuit between the 15 A fuse (#37) connector and E-SUS control unit harness connector terminal 23

- Open circuit between the battery and E-SUS control unit harness connector terminal 23
- Open circuit in 10 A fuse (#45)

- Short circuit between the 10 A fuse (#45) connector and E-SUS control unit harness connector terminal 19
- Short circuit between the 10 A fuse (#45) connector and set-up switch (suspension) harness connector terminal 18

- Open circuit between the ignition switch and E-SUS control unit harness connector terminal 19
- Battery or ignition switch

NO>>GO TO 3.
3.CHECK TERMINAL
Check that there is no malfunction in the pin terminals and connection of the E-SUS control unit harness connector.
Is the inspection result normal?
YES>>GO TO 4.
NO >>Repair or replace error-detected parts.
4.CHECK E-SUS CONTROL UNIT SIGNAL
With CONSULT-III

1. Connect the E-SUS control unit harness connector.
2. Start the engine.
   ■ CAUTION ■
   Always hold the vehicle stopped.
3. Check the value of “BATTERY VOL” on “DATA MONITOR” screen for “E-SUS”.

Is the value in “DATA MONITOR”“16 V” or more?
YES>>Perform the diagnosis by symptom for the charging system. Refer to Symptom Table.
NO>>Replace E-SUS control unit. Refer to Exploded View (GT-R certified NISSAN dealer).