C1791

DTC C1791 Front Acceleration Sensor RH (Test Mode DTC)

DESCRIPTION

DTC Detection Condition:

The acceleration sensor detects the amount of vertical force applied to the vehicle when accelerating or decelerating (G (up and down)). The acceleration sensors are mounted at 3 spots, which are in the absorber control ECU and at the front and rear of the cabin, to independently detect the amount of vertical force applied to the vehicle. The acceleration sensor converts the resistance, which changes according to the acceleration level, into an electric signal, and outputs it to the absorber control ECU.

The absorber control ECU detects the changes in each signal when performing the Test Mode check and outputs the Test Mode DTCs (C1791, C1792, C1793) if there is no change.

HINT:
- DTC C1715 and C1791 are for the right front acceleration sensor.
- DTC C1716 and C1792 are for the left front acceleration sensor.
- DTC C1717 and C1793 are for the rear acceleration sensor.
- Since the right front acceleration sensor is built into the absorber control ECU, replace the absorber control ECU when DTCs C1715 and C1791 are output.

Wiring Diagram:

Step 1:

Step 1(Continued)-2:

Step 3:

Step 4:

Step 5:

Step 5(Continued)-6:

Step 6(Continued):

INSPECTION PROCEDURE

NOTE: When replacing the absorber control ECU, check the acceleration sensor signal after replacement.

HINT:
- Check the condition of each related circuit connector before troubleshooting.
- When C1774 is output, inspect and repair the trouble areas indicated by C1774 first.