Note:
- The voltage at the terminals of the four-wheel drive control unit may vary depending on the measurement conditions and the condition of the vehicle, as a result of which the diagnostic results may be distorted. Therefore, it is necessary to carry out a general check of the input / output signals of the systems and the four-wheel drive control unit to determine the malfunction of the components.
- With the four-wheel drive control unit connector connected, measure the voltage by connecting the negative wire (-) voltmeter to body ground, and the positive wire (+) - to each of the outputs of the all-wheel drive control unit.
1. Measure the voltage or resistance at each of the four-wheel drive control unit terminals using a voltmeter and an ohmmeter. If the measured values are not correct, replace the four-wheel drive control unit.