DESCRIPTION
If a malfunction in the absorber control ECU is detected, DTC C1781 is stored.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate | Note |
|---|---|---|---|---|---|
| C1781 | Suspension Control ECU Malfunction | Either condition is met: A nonvolatile memory write or read error occurs. A CAN communication register is stuck. | Absorber control ECU CAN communication system | Does not come on |
The absorber control actuator changes the damping force depending on absorber control ECU signals.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate | Note |
|---|---|---|---|---|---|
| C1731 | Front Damping Force Control Actuator RH Circuit Malfunction | 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 | Does not come on | |
| C1732 | Front Damping Force Control Actuator LH Circuit Malfunction | 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 | Does not come on | |
| C1733 | Rear Damping Force Control Actuator RH Circuit Malfunction | 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 | Does not come on | |
| C1734 | Rear Damping Force Control Actuator LH Circuit Malfunction | 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.* | Front absorber control actuator LH Harness or connector Absorber control ECU | Does not come on |
*: 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 10
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.
a sensor signal does not fluctuate, test mode DTCs C1796, C1797 and C1798 remain stored.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate | Note |
|---|---|---|---|---|---|
| C1715 | Front Acceleration Sensor RH Malfunction | Either condition is met: With the engine switch on (IG), a voltage of 5.5 V or higher, or 4.3 V or less is detected at the power source of the front acceleration sensor RH for 0.5 seconds. With the engine switch on (IG), a voltage of 4.7 V or higher, or 0.3 V or less is detected at the front acceleration sensor RH for 1 second. | Absorber control ECU (built into front acceleration sensor RH) | Does not come on | |
| C1716 | Front Acceleration Sensor LH Malfunction | Either condition is met: With the engine switch on (IG), a voltage of 5.5 V or higher, or 4.3 V or less is detected at the power source of the front acceleration sensor LH for 0.5 seconds. With the engine switch on (IG), a voltage of 4.7 V or higher, or 0.3 V or less is detected at the front acceleration sensor LH for 1 second. | Harness or connector Front acceleration sensor LH Absorber control ECU | Does not come on | |
| C1717 | Rear Acceleration Sensor Malfunction | Either condition is met: With the engine switch on (IG), a voltage of 5.5 V or higher, or 4.3 V or less is detected at the power source of the rear acceleration sensor for 0.5 seconds. With the engine switch on (IG), a voltage of 4.7 V or higher, or 0.3 V or less is detected at the rear acceleration sensor for 1 second. | Harness or connector Rear acceleration sensor Absorber control ECU | Does not come on | |
| C1796 | Front Acceleration Sensor RH Malfunction (Test Mode DTC) | With the vehicle stationary on a level surface, 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. | Absorber control ECU (built into front acceleration sensor RH) | Test mode | |
| C1797 | Front Acceleration Sensor LH Malfunction (Test Mode DTC) | With the vehicle stationary on a level surface, 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. | Harness or connector Front acceleration sensor LH Absorber control ECU | Test mode | |
| C1798 | Rear Acceleration Sensor Malfunction (Test Mode DTC) | With the vehicle stationary on a level surface, 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. | Harness or connector Rear acceleration sensor Absorber control ECU | Test mode |
Scheme 11
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate | Note |
|---|---|---|---|---|---|
| C1782 | Power Source Voltage Malfunction | While the engine 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 | Does not come on |
Scheme 12
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 (brake actuator assembly).
If a malfunction occurs in either a front speed sensor or rear speed sensor, DTC C1783 is stored.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate | Note |
|---|---|---|---|---|---|
| C1783 | Speed Signal Communication Error | A speed sensor malfunction signal from the skid control ECU (brake actuator assembly) is detected for 1 second or more. | CAN communication system Brake control system (speed sensor circuit) Absorber control ECU | Does not come on |
Steering sensor signals are sent to the absorber control ECU via CAN communication.
When there is a communication malfunction, the malfunction will be detected by the diagnosis function.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate | Note |
|---|---|---|---|---|---|
| C1784 | Steering Angle Sensor Communication Error | 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 | Does not come on |
The absorber control ECU receives signals from the VGRS ECU (front steering control ECU) via CAN communication.
When there is a communication malfunction, the malfunction will be detected by the diagnosis function.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate | Note |
|---|---|---|---|---|---|
| C1785 | Steering Control ECU Communication Error | While the engine switch is on (IG), the VGRS ECU (front steering control ECU) malfunction signal is received for 5 seconds or more. | CAN communication system VGRS system | Does not come on | W/ VGRS System |
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate | Note |
|---|---|---|---|---|---|
| C1787 | Forward/Rearward/Sideways G Sensor Communication Error | While the engine switch is on (IG), a yaw rate sensor malfunction signal is detected for 1 second or more. | CAN communication system Yaw rate sensor Absorber control ECU | Does not come on |
- 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 ECM, steering sensor or VGRS ECU (front steering control ECU) is installed, the vehicle specifications and data will not match and DTC C1789 will be stored.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate | Note |
|---|---|---|---|---|---|
| C1789 | Vehicle Identification Malfunction | 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 ECM Steering sensor VGRS ECU (Front steering control ECU)* Absorber control ECU | Does not come on | *: w/ VGRS System |
The absorber control ECU receives signals from the skid control ECU (brake actuator assembly), steering sensor, yaw rate sensor, ECM, TCM and VGRS ECU (front steering control ECU) via CAN communication.
When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system first.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate | Note |
|---|---|---|---|---|---|
| U0100 | Lost Communication with ECM / PCM "A" | While driving at 30 km/h (19 mph), CAN communication from the ECM stops for 3 seconds or more. | ECM CAN communication system Absorber control ECU | Does not come on | |
| U0101 | Lost Communication With TCM | While driving at 30 km/h (19 mph), CAN communication from the ECM or TCM stops for 6 seconds or more. | TCM CAN communication system Absorber control ECU | Does not come on | |
| U0122 | Lost Communication with Vehicle Dynamics Control Module | CAN communication from the skid control ECU (brake actuator assembly) stops for 3 seconds or more. | Skid control ECU (brake actuator assembly) CAN communication system Absorber control ECU | Does not come on | |
| U0124 | Lost Communication with Lateral Acceleration Sensor Module | CAN communication from the yaw rate sensor stops for 3 seconds or more. | Yaw rate sensor CAN communication system Absorber control ECU | Does not come on | |
| U0126 | Lost Communication with Steering Angle Sensor Module | CAN communication from the steering sensor stops for 3 seconds or more. | Steering sensor CAN communication system Absorber control ECU | Does not come on | |
| U0130 | Lost Communication with VGRS | After the engine switch is turned on (IG) and 5 seconds elapse, CAN communication from the VGRS ECU (front steering control ECU) stops for 3 seconds or more. | VGRS ECU (Front steering control ECU)* CAN communication system Absorber control ECU | Does not come on | *: w/ VGRS System |