Eps warning light circuit

If the power steering ecu detects a malfunction, the p/s warning light comes on. At this time, the power steering ecu stores a dtc in its memory.

1. 1
   Check for dtc
2. 2
   Using the intelligent tester (with can vim), check for dtcs and confirm that there are no problems in the can communication system.

1. 1
   Read value of intelligent tester (ig power supply)
2. 2
   Connect the intelligent tester (with can vim) to the dlc3.
3. 3
   Turn the ignition switch on and press the intelligent tester main switch on.
4. 4
   Select the item "ig supply" in the data list and read the value displayed on the intelligent tester.

Main body ecu

1. 1
   Inspect fuse (ecu-ig1)
2. 2
   Remove the ecu-ig1 fuse from the instrument panel junction block.
3. 3
   Measure the resistance of the fuse.

Ok: below 1

4. Check wire harness (battery - power steering ecu and body ground)

1. 1
   Disconnect the a1 and e18 power steering ecu connector.
2. 2
   Measure the voltage of the wire harness side connectors.

Standard voltage

1. 1
   Perform active test by intelligent tester
2. 2
   Connect the intelligent tester (with can vim) to the dlc3.
3. 3
   Turn the ignition switch on and press the intelligent tester main switch on.
4. 4
   Operate the intelligent tester according to the steps on the display and select the active test.

Combination meter