a) Disconnect the connectors from the electronic control unit.
b) Remove the clips as shown in the figure, which will allow easy connection of the tester probes.
Note: Be careful with elements "A" and "B" which can be easily broken, especially in cold weather.
c) Reconnect the connectors to the electronic control unit.
Note:
- Make all voltage measurements with the connectors connected.
- The battery voltage must be at least 11V when the ignition is on.
Using a voltmeter with high self-resistance (not less than 10 kOhm/V), measure the voltage at each terminal of the electronic control unit.
(The original can be found on this resource toyotaman.ru)