Toyota Corolla Quiz
Diagnostics

Ecu power source circuit

In this manual: Diagnostics
Introduction — 31Preparation — 32Service specifications — 19Diagnostics — 497Engine control system — 6Fuel — 13Emission control — 28Exhaust — 3Cooling — 13Lubrication — 7Ignition — 3Starting & charging — 13Front suspension — 12Rear suspension — 9Tire & wheel — 1Drive shaft / propeller shaft — 15Brake — 42Automatic transmission / trans — 47Clutch — 19Steering column — 9Power steering — 11Heater & air conditioner — 20Supplemental restraint system — 27Seat belt — 12Lighting — 18Wiper & washer — 9Audio & visual — 12Wiring — 1Communication system — 1Windshield/windowglass/mirror — 31Seat — 10Theft deterrent & door lock — 10Sliding roof/convertible — 8Engine hood/door — 12Exterior/interior trim — 20Vehicle control system — 1Cruise control — 5Maintenance — 8
6steps
~36min
2/5difficulty
Done 0 of 6
Circuit description

This circuit provides power to operate the tvip ecu.

Wiring diagram
Toyota Corolla. Wiring diagram
Inspection procedure 1 Check fuse (ecu–b)
Toyota Corolla. Check fuse
  1. Remove the fuse from the instrument panel j/b.
  2. check the continuity of the fuse.

Standard: continuity

2 Check tvip ecu
2 Check tvip ecu
Toyota Corolla. Check tvip ecu
  1. Disconnect the tvip ecu connector.
  2. measure the voltage between the terminals of the ecu connector, as shown in the illustration and table.

Standard:

3 Check wire harness (tvip ecu  body ground)
3 Check wire harness (tvip ecu body ground)
Toyota Corolla. Check wire harness
  1. Disconnect the tvip ecu connector.
  2. check the connector on the harness side, as shown in the illustration and table.

Standard:

Check and replace tvip ecu
Check and replace tvip ecu

Test yourself

A quick Toyota Corolla quiz: every answer comes with an explanation and a link to the manual page.