NOTE
Be sure the battery is fully charged.
Main Harness [B] Fuel Pump [C]
Special Tool - Measuring Adapter: 57001-1700
Fuel Pump Operating Voltage Connections to Adapter:
Digital Meter (+) → R (pump Y/R) lead
Digital Meter (–) → BK (pump BK/W) lead
Operating Voltage Standard: Battery Voltage for 3 seconds, and then 0 V
If the reading stays on battery voltage and never shows 0 V, check the fuel pump relay (see Relay Circuit Inspection in the Electrical System chapter).
If the fuel pump relay is normal, check the ECU for its ground and power supply (see ECU Power Supply Inspection).
If the ground and power supply are good, replace the ECU (see ECU Removal/Installation).
If there is still no battery voltage, check the fuel pump relay (see Relay Circuit Inspection in the Electrical System chapter).
If the fuel pump relay is normal, check the wiring for continuity (see wiring diagram in this section).
Special Tool - Hand Tester: 57001-1394
If the wiring is good, check the ECU for its ground and power supply (see ECU Power Supply Inspection).
If the ground and power supply are good, replace the ECU (see ECU Removal/Installation).
If the reading is in specification, but the pump does not operate, replace the fuel pump (see Fuel Pump Removal/Installation).
Fuel Flow Rate Inspection
WARNINGGasoline is extremely flammable and can be
explosive
under certain conditions, creating the
potential for serious burns. Make sure the area is
well-ventilated and free from any source of flame
or sparks; this includes any appliance with a pilot
light. Do not smoke. T ...
Check 2-3: Intake Air Temperature Inspection
Disconnect the intake air temperature sensor connector
[A] (see Intake Air Temperature Sensor Removal in the
Self-Diagnosis System chapter).
Connect the variable rheostat [B] to the R/BK lead [C] and
BR/BK lead [D] terminals.
Turn the ignition switch to ON.
Read the temperatur ...
Backups
The ECU takes the following measures to prevent engine damage when the
DFI, ignition, S-KTRC
or immobilizer system parts have troubles.
Note:
(1): D-J Method: When the engine load is light like at idling or low
speed, the ECU determines the
injection quantity by calculating fr ...