Checking the acceleration sensor

Disconnect the acceleration sensor connector and attach the special test cable (extension adapter to enable the sensor to be rotated to test voltage when exposed to the own weight of the moving parts of the sensor's sensing element) to the sensor and connector. Turn on the ignition and measure the voltage between terminals 1 and 2. It should be 2.4-2.6 V.



Without disconnecting the test cable, turn the probe so that the arrow is pointing straight down. Measure the voltage between terminals 1 and 2. It should be 3.55-3.95V.



If the measurement results are out of range, measure the voltage between terminals 3 and 1. Standard value: 4.75-5.25 V.

Note: In the event of an interruption or short circuit in the acceleration sensor, the power supply to the sensor is cut off within 2 seconds after the ignition is turned on.

If the measured values of the first two tests are out of limits, and the value of the third test is within the standard, the acceleration sensor must be replaced.

If all measured values are out of specification, check the wiring. If the wiring is OK, the ABS-ECU may be faulty.