COMPONENTS
ILLUSTRATION
On-vehicle InspectionECU Power Source Circuit
DESCRIPTION
When the ignition switch is turned to ON, voltage from the ECM's MREL terminal
is applied to the EFI MAIN relay. This causes the contacts of the EFI MAIN relay
to close, which supplies power to terminal +B of the TCM.
WIRING DIAGRAM
PR ...
Diagnosis System
DIAGNOSIS SYSTEM
1. DESCRIPTION
When troubleshooting OBD II (On-Board Diagnostics) vehicles, an OBD
II scan tool (complying with SAE J1987) must be connected to the DLC3 (Data
Link Connector 3) of the vehicle. Various data in the vehicle ECM ( ...
Intake Air Temperature Sensor Gradient Too High (P0111)
DESCRIPTION
The intake air temperature sensor, mounted on the mass air flow meter,
monitors the intake air temperature. The intake air temperature sensor has
a built-in thermistor with a resistance that varies according to the temperature
...