Toyota RM787U, Руководство по обслуживанию и ремонту

Страница: 698 / 1976

- DIAGNOSTICS ENGINE
DI-1 1
165
Author: Date:
2001 SIENNA (RM787U)
7. ENGINE OPERATING CONDITION
NOTICE:
The values given below for ”Normal Condition” are representative values, so a vehicle may still be
normal even if its value varies from those listed here. So do not decide whether a part is faulty or
not solely according to the ”Normal Condition” here.
(a)
CARB mandated signals.
LEXUS hand-held tester display Measurement Item Normal Condition*
FUEL SYS #1
Fuel System Bank 1
OPEN: Air-fuel ratio feedback stopped
CLOSED: Air-fuel ratio feedback operating
Idling after warming up: CLOSED
FUEL SYS #2
Fuel System Bank 2
OPEN: Air-fuel ratio feedback stopped
CLOSED: Air-fuel ratio feedback operating
Idling after warming up: CLOSED
CALC LOAD
Calculator Load: Current intake air volume as a
proportion of max. intake air volume
Idling: 13.1 - 18.7 %
Racing without load (2,500rpm): 11.7 - 17.3 %
COOLANT TEMP Engine Coolant Temp. Sensor Value After warming up: 80 - 95
°
C (176 - 203
°F)
SHORT FT #1 Short-term Fuel Trim Bank 1 0
±
20%
LONG FT #1 Long-term Fuel Trim Bank 1 0
±
20%
SHORT FT #2 Short-term Fuel Trim Bank 2 0
±
20%
LONG FT #2 Long-term Fuel Trim Bank 2 0
±
20 %
ENGINE SPD Engine Speed Idling: 650 -
750
rpm
VEHICLE SPD Vehicle Speed Vehicle stopped: 0 km/h (0 mph)
IGN ADVANCE Ignition Advance: Ignition Timing of Cylinder No.1 Idling: BTDC 8 - 12
°
INTAKE AIR Intake Air Temp. Sensor Value Equivalent to Ambient Temp.
MAF Air Flow Rate Through Mass Air Flow Meter
Idling: 3.3 - 4.7 gm/sec.
Racing without load (2,500 rpm):
10.4 - 15.4 gm/sec.
THROTTLE POS
Voltage Output of Throttle Position Sensor Calcu-
lated as a percentage: 0 V
→
0 %, 5 V
→
100 %
Throttle valve fully closed: 7 - 11 %
Throttle valve fully open: 65 - 75 %
O2S B1 S2
Voltage Output of Oxygen Sensor Bank 1, Sen-
sor 2
Driving 50 km/h (31 mph): 0.05 - 0.95 V
A/FS B1 S1 Voltage Output of A/F Sensor Bank 1 Sensor 1 Idling: 2.8 - 3.8 V
A/FS B2 S1 Voltage Output of A/F Sensor Bank 2 Sensor 1 Idling: 2.8 - 3.8 V
A/FFT B1 S1
A/F Sensor Fuel Trim Bank 1, Sensor 1
(Same as SHORT FT #1)
0
±
20 %
A/FFT B2 S1
A/F Sensor Fuel Trim Bank 2, Sensor 1
(Same as SHORT FT #1)
0
±
20 %
∗
: If no conditions are specifically stated for ”ldling”, it means the shift lever is at N or P position, the A/C switch
is OFF and all accessory switches are OFF.
(b)
TOYOTA Enhanced Signals.
TOYOTA hand-held tester display Measurement Item Normal Condition*
MISFIRE RPM Engine RPM for first misfire range Misfire 0: 0 rpm
MISFIRE LOAD Engine load for first misfire range Misfire 0: 0 g/r
INJECTOR Fuel injection time for cylinder No.1 Idling: 1.6 - 2.9 ms
IAC DUTY RATIO
Intake Air Control Valve Duty Ratio
Opening ratio rotary solenoid type IAC valve
Idling: 27 - 47 %
STARTER SIG Starter Signal Cranking: ON
CTP SIG Closed Throttle Position Signal Throttle fully closed: ON