Coasting Richer System
- Run engine at idle speed. Using a voltmeter with negative lead to ground, backprobe terminal "H" (Brown/Black wire) of solenoid valve connector. See Fig 1 .
- Increase engine speed to 3000 RPM and lift idle switch arm. See Fig 2 . Verify voltmeter indicates appropriate voltage according to RPM. See COASTING RICHER SYSTEM RPM/VOLTAGE table.
- If voltmeter reading is not as specified, check coasting richer solenoid valve and voltage at terminal 2H of ECU. See PIN VOLTAGE CHART S article.
COASTING RICHER SYSTEM RPM/VOLTAGE
| RPM | Volts |
|---|---|
| 2500 Or More | Approx. 12 Volts |
| 2500-1400 | Less Than 1.5 Volts |
| 1400 Or Less | Approx. 12 Volts |