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Wednesday, July 16, 2008

Nissan Skyline GT-R : ATTESA Code 18




Troubleshooting. ATTESA unit. Code 18. They got the code after they dropped the subframe. They might have pulled a wire a bit, or crushed something on the way back up. The codes help us to isolate the problem.

Yes, they actually mis-spelled ATTESA in the R32 manual.

When I have seen a code 18 recently - 2018, to 2019 it was not actually the pressure switch. Rather the pressure switch code was an indicator of low pressure in the nitrogen accumulator.  The accumulator helps provide system pressure.  

If the accumulator pressure is low, normally the ATTESA pump runs a little longer than normal prime on startup.   The next indicator would be a clicking sound from the ATTESA relay in the trunk. You will hear it click, click, click, click.   This is also a good indication of the Accumulator pressure being low. 

Sean Kirby over at Poor People Racing has made a special tool, to make Accumulator replacement, in car possible. 

ATTESA Accumulator at Poor People Racing


1 Right front wheel speed sensor or circuit
2 Left front wheel speed sensor or circuit
3 Right rear wheel speed sensor or circuit
4 Left rear wheel speed sensor or circuit

5 ABS right front wheel actuator solenoid or circuit
6 ABS front front wheel actuator solenoid or circuit
7 ABS rear wheel actuator solenoid or circuit
8 ABS actuator motor, motor relay or circuit
9 ABS actuator relay or circuit

10 ETS control unit power supply or circuit
11 Fore-and-aft G sensor 1 or circuit
12 Fore-and-aft G sensor 2 or circuit
13 Fore-and-aft G sensor 1, fore-and-aft G sensor 2
14 G sensor power supply 1 or circuit
15 G sensor power supply 2 or circuit
16 Lateral G sensor or circuit

17 Air bleed connector or circuit
18 ETS pressure switch or circuit
           Troubleshooting Code 18 R32 GT-R
19 ETS motor, motor relay or circuit
20 ETS solenoid or circuit
21 Throttle sensor or circuit
22 ETS oil level switch or circuit
24 ETS control unit, ground or circuit

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