1.CHECK SET-UP SWITCH (SUSPENSION) MODE LAMP POWER SUPPLY

1. Turn the ignition switch OFF.
2. Remove the set-up switch (suspension).
3. Check the voltage between the set-up switch (suspension) connector terminals.

   Set-up switch (suspension) | — | Measuring condition | Voltage
   Terminal
   18 | Ground | Ignition switch: ON | Battery voltage
   Ignition switch: OFF | Approx. 0 V

Is the inspection result normal?
YES>>GO TO 2.
NO>>
Check the following items, and repair or replace the malfunctioning parts.

- Open circuit in 10 A fuse (#45)

- 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 set-up switch (suspension) harness connector terminal 18
- Battery or ignition switch

2.CHECK SET-UP SWITCH (SUSPENSION) CIRCUIT

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

   E-SUS control unit | Set-up switch (suspension) | Continuity
   Connector | Terminal | Connector | Terminal
   M110 | 5 | M73 | 19 | Existed
   9 | 8

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

   E-SUS control unit | — | Continuity
   Connector | Terminal
   M110 | 5 | Ground | Not existed
   9

Is the inspection result normal?
YES>>GO TO 3.
NO>>Repair or replace the malfunctioning harness or connector.
3.PERFORM ACTIVE TEST
With CONSULT-III

1. Connect the E-SUS control unit harness connector.
2. Connect the set-up switch (suspension) connector.
3. Select “MODE LAMP” in “ACTIVE TEST”.
4. On the display, touch “ON” or “OFF”, and check that the system operates as shown in the table below.

Test item | Display Item | Display Item
Illumination status
ON | OFF
MODE LAMP | R | ON | OFF
COMF

Is the inspection result normal?
YES>>GO TO 4.
NO>>Replace the set-up switch (suspension).
4.PERFORM SELF-DIAGNOSIS
With CONSULT-III

1. Perform “E-SUS” self-diagnosis.

Is DTC “D1D21” or “D1D22”detected?
YES>>Go to DTC Index.
NO>>GO TO 5.
5.CHECK INFORMATION
Check the information and malfunction history of “DATA MONITOR” for each DTC. Refer to Reference Value (GT-R certified NISSAN dealer).
Is each data within standard values?
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).