DESCRIPTION
The acceleration sensor (up and down G sensor) detects the upward and downward acceleration of the vehicle and outputs it as a voltage to the absorber control ECU. Up and down G sensors are installed in 3 locations: 1) the absorber control ECU, 2) the driver side instrument panel, and 3) behind the inner luggage compartment trim cover RH. Each up and down G sensor independently detects the upward and downward acceleration of the vehicle. During a test mode inspection, the absorber control ECU reads the fluctuations in each sensor signal. If a sensor signal does not fluctuate, test mode DTCs C1796, C1797 and C1798 remain stored.
| DTC Code | Detection Condition | Trouble Area |
|---|
| C1715 | Either condition is met: With the power switch on (IG), a voltage of 5.5 V or higher, or 4.3 V or less at the power source of the front acceleration sensor RH is detected for 0.5 seconds. With the power switch on (IG), a voltage of 4.7 V or higher, or 0.3 V or less at the front acceleration sensor RH voltage input is detected for 1 second. | Absorber control ECU (houses front acceleration sensor RH) |
| C1796 | The vehicle is stationary on a level surface and an acceleration sensor value that is within -1.96 to 1.96 m/s 2 is not received from the front acceleration sensor RH for 1 second or more. |
| C1716 | Either condition is met: With the power switch on (IG), a voltage of 5.5 V or higher, or 4.3 V or less at the power source of the front acceleration sensor LH is detected for 0.5 seconds. With the power switch on (IG), a voltage of 4.7 V or higher, or 0.3 V or less at the front acceleration sensor LH voltage input is detected for 1 second. | Harness or connector Front acceleration sensor LH Absorber control ECU |
| C1797 | The vehicle is stationary on a level surface and an acceleration sensor value that is within -1.96 to 1.96 m/s 2 is not received from the front acceleration sensor LH for 1 second or more. |
| C1717 | Either condition is met: With the power switch on (IG), a voltage of 5.5 V or higher, or 4.3 V or less at the power source of the rear acceleration sensor is detected for 0.5 seconds. With the power switch on (IG), a voltage of 4.7 V or higher, or 0.3 V or less at the rear acceleration sensor voltage input is detected for 1 second. | Harness or connector Rear acceleration sensor Absorber control ECU |
| C1798 | The vehicle is stationary on a level surface and an acceleration sensor value that is within -1.96 to 1.96 m/s 2 is not received from the rear acceleration sensor for 1 second or more. |
Scheme 8
The absorber control actuator switches the damping force depending on the absorber control ECU signals.
| DTC Code | Detection Condition | Trouble Area |
|---|
| C1731 | Either condition is met: The front absorber control actuator RH is not being powered and an open circuit is detected between the front absorber control actuator RH and absorber control ECU for 1 second or more using the open detection circuit. The front absorber control actuator RH is being powered and a short circuit is detected between the front absorber control actuator RH and absorber control ECU 8 times consecutively.* | Front absorber control actuator RH Harness or connector Absorber control ECU |
| C1732 | Either condition is met: The front absorber control actuator LH is not being powered and an open circuit is detected between the front absorber control actuator LH and absorber control ECU for 1 second or more using the open detection circuit. The front absorber control actuator LH is being powered and a short circuit is detected between the front absorber control actuator LH and absorber control ECU 8 times consecutively.* | Front absorber control actuator LH Harness or connector Absorber control ECU |
| C1733 | Either condition is met: The rear absorber control actuator RH is not being powered and an open circuit is detected between the rear absorber control actuator RH and absorber control ECU for 1 second or more using the open detection circuit. The rear absorber control actuator RH is being powered and a short circuit is detected between the rear absorber control actuator RH and absorber control ECU 8 times consecutively.* | Rear absorber control actuator RH Harness or connector Absorber control ECU |
| C1734 | Either condition is met: The rear absorber control actuator LH is not being powered and an open circuit is detected between the rear absorber control actuator LH and absorber control ECU for 1 second or more using the open detection circuit. The rear absorber control actuator LH is being powered and a short circuit is detected between the rear absorber control actuator LH and absorber control ECU 8 times consecutively.* | Rear absorber control actuator LH Harness or connector Absorber control ECU |
- *: When a short circuit is detected, the absorber control actuator operation is momentarily stopped and then resumes after a certain period of time. A malfunction is detected when a short circuit is detected 8 times consecutively while the absorber control actuator is being powered.
Scheme 9
If a malfunction in the absorber control ECU is detected, DTC C1781 is stored.
| DTC Code | Detection Condition | Trouble Area |
|---|
| C1781 | Either condition is met: A nonvolatile memory write or read error occurs. A CAN communication register is stuck. | Absorber control ECU CAN communication system |
| DTC Code | Detection Condition | Trouble Area |
|---|
| C1782 | While the power switch is on (IG), the voltage at terminal B is 10 V or less, or 16 V or higher for 0.5 seconds. | AVS fuse Battery Charging system Harness or connector Absorber control ECU |
Scheme 10
Scheme 10: WIRING DIAGRAM
The speed sensors monitor the speed of the wheels and send an appropriate speed signal to the absorber control ECU through the skid control ECU assembly. If trouble occurs in either a front speed sensor or rear speed sensor, DTC C1783 is stored.
| DTC Code | Detection Condition | Trouble Area |
|---|
| C1783 | A speed sensor malfunction signal from the skid control ECU assembly is detected for 1 second or more. | CAN communication system Brake control system (speed sensor circuit) Absorber control ECU |
The steering sensor signal is sent to the absorber control ECU using the CAN communication system. When there is a communication malfunction, the malfunction will be detected by the diagnosis function.
| DTC Code | Detection Condition | Trouble Area |
|---|
| C1784 | A steering sensor signal malfunction is detected, or a steering sensor power malfunction signal is detected for 5 seconds or more. | CAN communication system Brake control system (steering sensor circuit) Absorber control ECU |
| DTC Code | Detection Condition | Trouble Area |
|---|
| C1787 | While the power switch is on (IG), a yaw rate sensor malfunction signal is detected for 1 second or more. | CAN communication system Brake control system (yaw rate sensor circuit) Absorber control ECU |
- When the absorber control ECU has not acquired the vehicle identification information, DTC C1789 is stored. When the vehicle identification information is correctly acquired, this DTC is cleared. Vehicle identification information is automatically acquired when the system enters test mode.
- If an incorrect power management control ECU or steering sensor is installed, the vehicle specification and data will not match and DTC C1789 will be stored.
| DTC Code | Detection Condition | Trouble Area |
|---|
| C1789 | Either condition is met: The vehicle identification information is not stored. Vehicle identification information that is different from the stored information has been received 3 times. | CAN communication system Vehicle identification information Power management control ECU Steering sensor Absorber control ECU |
The absorber control ECU receives signals from the skid control ECU assembly, the steering sensor, the yaw rate sensor, the ECM and power management control ECU via CAN communication. When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system first.
| DTC Code | Detection Condition | Trouble Area |
|---|
| U0101 | While driving at 30 km/h (19 mph), CAN communication from the ECM stops for 6 seconds or more. | ECM CAN communication system Absorber control ECU |
| U0122 | CAN communication from the skid control ECU (brake actuator assembly) stops for 3 seconds or more. | Skid control ECU assembly CAN communication system Absorber control ECU |
| U0124 | CAN communication from the yaw rate sensor stops for 3 seconds or more. | Yaw rate sensor CAN communication system Absorber control ECU |
| U0126 | CAN communication from the steering sensor stops for 3 seconds or more. | Steering sensor CAN communication system Absorber control ECU |
| U0293 | While driving at 30 km/h (19 mph), CAN communication from the power management control ECU stops for 3 seconds or more. | Power management control ECU CAN communication system Absorber control ECU |
