1. Fuel tank
2. Fuel pump
3. Fuel filter
4. Fuel temperature sensor
5. Fuel heater
(A): Gauge
(B): Hose
(C): Attachment
5
(C)
6-1-58 ENGINE DIAGNOSIS (RHZ ENGINE WITH TRIPLE-CONNECTOR ECM)
TABLE B-2 FUEL PRESSURE INSPECTION
SYSTEM DIAGRAM
INSPECTION
NOTE:
Before using following flow table, check to make sure that battery voltage is higher than 11 V. If battery
voltage is low, pressure becomes lower than specification even if fuel pump and line are in good condition.
STEP
ACTION YES NO
1 1) Install fuel pressure gauge, referring to
“Low Pressure Fuel Supply System
Inspection” in Section 6E3.
2) Operate fuel pump.
Is fuel pressure then about 220 kPa
(2.2 kg/cm
2
, 31.3 psi)?
Normal fuel pressure. Go to Step 2.
2 Was fuel pressure higher than spec. in Step 1? Clogged fuel heater, fuel
filter fuel temperature or
fuel hose/pipe.
Go to Step 3.
3 Was no fuel pressure applied in Step 1? D Shortage of fuel or
D Fuel pump and its
circuit defective.
(Refer to Table B-1
“Fuel Pump Circuit
Inspection”.)
Fuel leakage from fuel
line.
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