3.
Has a problem been found?
 | ▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure. |
 | ▶ Go to "Power Circuit Inspection" procedure. |
Many malfunctions in the electrical system are caused by poor harness and terminals.
Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
Thoroughly check all connectors (and connections) for looseness, bending, corrosion, contamination, deterioration, and/or damage.
Has a problem been found?
| ▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure. |
| ▶ Go to "Power Circuit Inspection" procedure. |
Ignition switch "OFF"
Connect VMI to GDS and set up the Oscilloscope.(2 Channel):
Channel A (+) : Power terminal (Low Fuel Pressure Sensor Harness Connector)
Channel A (-) : Ground
Ignition switch "ON" & Engine "ON"
Inspection condition : Ignition switch "ON" & Engine idle
Specification : Approx. 5V
Is the measured value within specification?
| ▶ Go to "Ground Circuit Inspection" procedure. |
| ▶ Inspect and repair open or short in circuit, and then go to "Verification of Vehicle Repair" procedure. |
Ignition switch "OFF"
Disconnect battery (-) cable.
Refer to "Shop Manual" and disconnect FPCM connector.
Measure the resistance between ground terminal of FPCM harness connector and chassis ground.
Specification :Approx. below 1Ω
Ignition switch "OFF"
Refer to "Shop Manual" and disconnect FPCM connector.
Ignition switch "ON"
Measure the voltage between power terminal of FPCM harness connector and chassis ground.(A)
Measure the voltage between power terminal and ground terminal of FPCM harness connector.(B)
Specification : Difference in (A) and (B) is less than 200 mV
Is the measured value within specification?
| ▶ Go to "Control Circuit Inspection" procedure. |
| ▶ Inspect and repair open or short in circuit, and then go to "Verification of Vehicle Repair" procedure. |
Ignition switch "OFF"
Connect VMI to GDS and set up the Oscilloscope.(2 Channel):
Channel A (+) : Control terminal (Fuel Pump Harness Connector)
Channel A (-) : Ground
Ignition switch "ON" & Engine "ON"
Inspection condition : Ignition switch "OFF" & Ignition switch "ON"
Specification : Approx. 6A (Refer to figure below)
Fig.1) Fuel pump operating current upon ignition switch "OFF" to Ignition switch "ON"
Is the measured value within specification?
| ▶ Go to "Component Inspection" procedure. |
| ▶ Inspect and repair open or short in circuit, and then go to "Verification of Vehicle Repair" procedure. |
When installing component, tighten it within specification
If component is dropped, check for proper operation. The internal damage may be present
