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Toyota Corolla Repair Manual: Ecu power source circuit

Circuit description

This circuit provides power to operate the tvip ecu.

Wiring diagram

Inspection procedure

Inspection procedure

1 Check fuse (ecub)

  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

  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)

  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

Inspection procedure
1 Check security indicator light Remove the security indicator.  check the indicator light, as shown in the illustration and table. Standard: 2 Check wire harness (tvip ecu& ...

Ignition switch circuit
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