1989-Montero · fuel system · страница 31 из 53 · Открыть оригинал PDF ↗
ENGlNE SPEED SENSOR (IGNITION COIL TERMINAL)
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INSPECTION
Check that there is continuity between the ignition coil -
terminal and the electronic control unit terminal 10.
NOTE
Shake the harness connector to check for lurking open circuit.
OXYGEN SENSOR INSPECTION
Caution
1. Before checking, warm up the ‘engine until engine
coolant temperature reaches 85 to 95” (185 to 205°F).
2. Use an accurate digital voltmeter.
(1) Disconnect the oxygen sensor connector and connect a
voltmeter to the oxygen sensor connector.
(2) While repeating engine racing, measure the oxygen
sensor output voltage.
| Engine | Oxygen sensor output voltage | Remarks |
|---|---|---|
| Racing | Approx. 1 V | Make air-fuel mixture richer by accelerator operation |
Таблица в оригинале
NOTE
For removal and installation of the oxygen sensor, refer to
GROUP 11 - Exhaust Manifold.
Oxygen sensor installation torque : 40 - 50 Nm
(30 - 36 ft. Ibs.)
VACUUM SWITCH INSPECTION
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(1) Disconnect the vacuum hose (green’ stripe) from the
device box, and connect a manual vacuum pump to the
device box nipple.
(2) Disconnect the vacuum switch connector
(3) Apply negative pressure (vacuum) and check whether or
not there is continuity between the switch terminals.
| Vacuum gauge | Measured terminals | Continuity |
|---|---|---|
| 26 kPa (3.9 psi) or lower | c8-B | No (oat-L) |
| 40 kPa (5.8 psi) or higher | 0 | Yes (On) |
Таблица в оригинале
(4) If there is a problem, remove the device box cover, and
replace the vacuum switch assembly.
Оригинальная страница руководства
