Throttle Valve Switch (Code 23)
- Check harness for continuity. If no good, repair. Check throttle valve switch for continuity between terminals 18 and 25. If there is no continuity, adjust switch as described in next step.
- To adjust, disconnect AAC valve harness connector on 300ZX Turbo only. On all models, hold engine speed as listed by holding the throttle valve. Adjust idle switch to on at the specified idle speed. If switch can not be adjusted, replace throttle valve switch.
IDLE SPEEDS
| Application |
RPM |
| 300ZX |
850-950 |
| 300ZX Turbo |
800-850 |
- If in step 1
there was continuity, check continuity between 18, 25 and ground on 300ZX and 300ZX Turbo. If there is continuity, replace throttle valve switch. If no continuity, replace ECCS control unit.