Toyota Corolla Quiz
Diagnostics

Terminals of ecu

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
4steps
~24min
2/5difficulty
Done 0 of 4
1. Inspect integration relay
Toyota Corolla. Inspect integration relay
  1. Disconnect the connector from the integration relay.
  2. check the continuity between each terminal of the disconnected connector and the body ground, as shown in the illustration and table.

Standard:

Toyota Corolla. Inspect integration relay

If the result is not as specified, the vehicle’s side may malfunction.

  1. reconnect the connector and check the voltage between each terminal and the body ground, as shown in the illustration and table.

Standard:

Toyota Corolla. Inspect integration relay

If the result is not as specified, the integration relay may malfunction.

2. Inspect instrumental panel j/b (integration relay)
Toyota Corolla. Inspect instrumental panel j/b
  1. Disconnect the connectors ia, ib, id, if, ih and ij of the instrument panel j/b.
  2. check the continuity between each terminal of the disconnected connectors and the body ground, as shown in the illustration and table.

Standard:

Toyota Corolla. Inspect instrumental panel j/b

If the result is not as specified, the vehicle’s side may malfunction.

  1. reconnect the connectors and check the voltage between each terminal and the body ground, as shown in the illustration and table.

Standard:

Toyota Corolla. Inspect instrumental panel j/b

If the result is not as specified, the integration relay or instrument panel j/b assembly may malfunction.

Problem symptoms table
Toyota Corolla. Problem symptoms table

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