1.CHECK SET-UP SWITCH (SUSPENSION) Check the set-up switch (suspension). Refer to Component Inspection (GT-R certified NISSAN dealer). Is the inspection result normal? YES>>GO TO 2. NO>>Replace the set-up switch (suspension).
2.CHECK SET-UP SWITCH (SUSPENSION) CIRCUIT (1)
Check the continuity between the set-up switch (suspension) harness connector and ground.

Set-up switch (suspension) | — | Continuity
Connector | Terminal
M73 | 17 | Ground | Existed

Is the inspection result normal?
YES>>GO TO 3.
NO>>Repair or replace the malfunctioning harness or connector.
3.CHECK SET-UP SWITCH (SUSPENSION) CIRCUIT (2)

1. Disconnect the E-SUS control unit harness connector.
2. Check the continuity between the E-SUS control unit harness connector and set-up switch (suspension) harness connector.

   E-SUS control unit | Set-up switch (suspension) | Continuity
   Connector | Terminal | Connector | Terminal
   M110 | 2 | M73 | 6 | Existed
   7 | 24

3. Check the continuity between the E-SUS control unit harness connector and ground.

   E-SUS control unit | — | Continuity
   Connector | Terminal
   M110 | 2 | Ground | Not existed
   7

Is the inspection result normal?
YES>>GO TO 4.
NO>>Repair or replace the malfunctioning harness or connector.
4.CHECK E-SUS CONTROL UNIT OUTPUT SIGNAL

1. Connect the E-SUS control unit harness connector.
2. Turn the ignition switch ON.
   ■ CAUTION ■
   Never start the engine.
3. Check the voltage between the set-up switch (suspension) harness connector.

Set-up switch (suspension) | Voltage
Connector | Terminal
M73 | 6 – 17 | Approx. 3.48 – 3.57 – 3.66 V
24 – 17

Is the inspection result normal?
YES>>Check pin terminal and connection of each harness connector for damage or loose connection.
NO>>Replace E-SUS control unit. Refer to Exploded View (GT-R certified NISSAN dealer).