Toyota RAV4 Service Manual: Tc and cg terminal circuit

Description

Dtc output mode is set by connecting terminals tc and cg of the dlc3.

The dtcs are displayed by blinking the srs warning light.

Hint:

• Make sure that dtc b1281 has not been output. If dtc b1281 has been output, refer to the multiplex communication system.
• When each warning light keeps blinking, a ground short in the wiring of terminal tc of the dlc3 or an internal ground short in each ecu is suspected.

Wiring diagram

Inspection procedure

1. Check wire harness (dlc3 - ecm)

1. Turn the ignition switch off.
2. Disconnect the a9 connectors from the center airbag sensor .
3. Measure the resistance of the wire harness side connectors.

Standard resistance

2. Check wire harness (cg of dlc3 - body ground)

1. Measure the resistance of the wire harness side connectors.

Standard resistance

3. Check wire harness (tc of ecm)

1. Measure the resistance of the wire harness side connector.

Standard resistance

4. Replace ecm

1. Replace the ecm.
2. Check the dtc of the ecm (see page es-35).

Result

Repair or replace wire harness or each ecu