Onvehicle Inspection Nmw
1. CHECK FUEL PUMP OPERATION
(a) Using SST, connect terminals + B and FP of the check connector. SST 09843-18020
(b) Turn the ignition switch ON. NOTICE: Do not start the engine.
(c) Check that there is pressure in the hose from the fuel filter.
HINT: At this time, you will hear fuel return noise.
(d) Remove SST. SST 09843-18020
(e) Turn the ignition switch OFF.
If there is no pressure, check the following parts:
• Fusible links
• Wiring connections
CHECK FUEL PRESSURE
(a) Check that the battery voltage is above 12 volts.
(b) Disconnect the cable from the negative (-) terminal of the battery.
CAUTION: Work must be started after approx. 20 seconds or longer from the time the ignition switch is turned to the "LOCK" position and the negative (-) terminal cable is disconnected from the battery.
(c) Remove the union bolt and two gaskets, and disconnect the fuel inlet hose from the delivery pipe. HINT:
• Put a suitable container or shop towel under the cold start injector pipe.
• Slowly loosen the union bolt.
(d) Install the fuel inlet hose and SST (pressure gauge)
to the delivery pipe with three new gaskets and SST (union bolt). SST 09268-45012 Torque: 300 kg-cm (22 ft-Ib, 29 N-m)
(e) Wipe off any splattered gasoline.
(f) Using SST, connect terminals + B and FP of the check connector. SST 09843-18020
(g) Reconnect the battery negative (-) cable.
(h) Turn the ignition switch ON.
(i) Measure the fuel pressure. Fuel pressure: 2.7 - 3.1 kg /cm2
If pressure is high, replace the fuel pressure regulator. If pressure is low, check the following parts:
• Fuel hoses and connections
• Fuel pressure regulator (j) Remove SST.
SST 09843-18020
(k) Start the engine.
(1) Disconnect the vacuum sensing hose from the fuel pressure regulator. (m) Measure the fuel pressure at idling. Fuel pressure: 2.7 - 3.1 kg/cm'
(n) Reconnect the vacuum sensing hose to the fuel pressure regulator, and plug the hose end. (o) Measure the fuel pressure at idling. Fuel pressure: 2.1 - 2.6 kg/cm'
(31 - 37 psi, 206 - 255 kPa) If pressure is not as specified, check the vacuum sensing hose and fuel pressure regulator.
(p) Stop the engine. Check that the fuel pressure remains 1.5 kg/cm' (21 psi, 147 kPa) or more for 5 minutes after the engine is turned off. If pressure is not as specified, check the fuel pump, pressure regulator and/or injector.
(q) After checking fuel pressure, disconnect the battery negative (-) cable and carefully remove the SST to prevent gasoline from splashing. SST 09268-45012
(r) Reconnect the fuel inlet hose to delivery pipe with two new gaskets and the union bolt. Torque: 300 kg-cm (22 ft-Ib, 29 N-m)
(s) Reconnect the cable to the negative (-) terminal of the battery. (t) Check for fuel leakage. (See page FI-10)
CHECK FUEL PRESSURE
(a) Check that the battery voltage is above 12 volts.
(b) Disconnect the cable from the negative(-) terminal of the battery.
CAUTION: Work must be started after approx. 20 seconds or longer from the time the ignition switch is turned to the "LOCK" position and the negative (-) terminal cable is disconnected from the battery.
(c) Remove the union bolt and two gaskets, and disconnect the cold start injector pipe from the delivery pipe.
HINT:
• Put a suitable container or shop towel under the cold start injector pipe.
• Slowly loosen the union bolt.
(d) Install SST (pressure gauge) to the delivery pipe with two new gaskets and the union bolt. SST 09268-45012 Torque: 180 kg-cm (13 ft-Ib, 18 N-m)
(e) Wipe off any splattered gasoline.
(f) Disconnect the cold start injector connector.
(g) Using SST, connect terminals + B and FP of the check connector. SST 09843-18020
(h) Reconnect the battery negative (-) cable.
(i) Turn the ignition switch ON. (j) Measure the fuel pressure. Fuel pressure: 2.7 - 3.1 kg/cm 2
If pressure is high, replace the fuel pressure regulator. If pressure is low, check the following parts:
• Fuel hoses and connections
• Fuel pressure regulator
(k) Remove SST. SST 09843-18020
(1) Start the engine.
(m) Disconnect the vacuum sensing hose from the fuel pressure regulator. (n) Measure the fuel pressure at idling. Fuel pressure: 2.7 - 3.1 kg/cm 2
(o) Reconnect the vacuum sensing hose to the fuel pressure regulator and plug the hose end. (p) Measure the fuel pressure at idling. Fuel pressure: 2.3 - 2.6 kg/cm'
(33 - 37 psi, 226 - 255 kPa) If pressure is not as specified, check the vacuum sensing hose and fuel pressure regulator.
(q) Stop the engine. Check that the fuel pressure remains 1.5 kg /cm2 (21 psi, 147 kPa) or more for 5 minutes after the engine is turned off. If pressure is not as specified, check the fuel pump, pressure regulator and/or injector.
(r) After checking fuel pressure, disconnect the battery negative (-) cable and carefully remove the SST to prevent gasoline from splashing. SST 09268-45012
(s) Reconnect the cold start injector connector.
(t) Reconnect the cold start injector pipe with two new gaskets and the union bolt. Torque: 180 kg-cm (13 ft-Ib, 18 N-m) (u) Reconnect the cable to the negative (-) terminal of the battery.
(v) Check for fuel leakage. (See page FI-10)
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