After connecting the specified power source, measure the voltage.
1.24v road (example: horn circuit)
(1) In order from the upstream (from the power supply) or from the downstream (from the accessories), perform the circuit inspection. Set the following inspection conditions: (a) The key switch position is ACC or ON. (b) Horn switch position is ON (when checking terminal 9 or 10). (c) The black terminal (negative) of the tester is connected to the machine frame (ground). (d) The red terminal (positive) of the tester is connected to the check point.
E) The power supply is a battery (24V).
(2) Evaluation. If the measured voltage is lower than the battery voltage (usually 23.5 ~ 24V), the connector may be faulty. 2.5V circuit (1) The voltage between terminal I and the machine frame (ground). ①Turn the key switch to the OFF position and disconnect the sensor connector. Measure the voltage between terminal 1 on the wire side connector of the machine and the machine frame under the following conditions: (a) The key switch position is 0N. (b) Connect the black terminal (negative) of the tester to the machine frame (ground). (c) The red terminal (positive) of the tester is connected to terminal 1.
②evaluation. If the measured voltage is in the range of (5 +0.5) V, the circuit to terminal 1 is normal.
(2) The voltage between terminal 1 and the ground terminal.
①Turn the key switch to the OFF position and disconnect the sensor connector. Measure terminal 1 and ground terminal on the wire side connector of the machine under the following conditions (the ground terminal is terminal 2 of a two-pole connector, which contains a pressure switch and a T sensor; or the ground terminal is terminal 3 of a 3-pole connector, The 3-pole connector contains the voltage between A sensor, DP sensor, P sensor, EC sensor, ABP sensor): (a) The key switch position is ON. (b) The black terminal (negative) of the tester is connected to the ground terminal (terminal 2 or 3). (e) Connect the red terminal (positive) of the tester to terminal 1.
②evaluation. If the measured voltage is in the range of (5 +0.5) V, the circuit to terminal 1 or to the ground terminal is normal.
