DESCRIPTION
The acceleration sensor assembly detects the amount of vertical force applied to the vehicle when accelerating or decelerating (G (up and down)). The acceleration sensor assemblies 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 assembly converts the resistance, which changes according to the acceleration level, into an electric signal, and output 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.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| C1715 C1791 | When either of the following continues for 0.5 seconds or more: A signal of -9.8m/s 2 to 9.8m/s 2 or less is not input from the acceleration sensor assemblies to the absorber control ECU with the engine switch on (IG). The power source voltage of the right front acceleration sensor assembly is 5.5 V or higher or 4.3 V or lower. | Absorber control ECU (Houses right front acceleration sensor) |
| C1716 C1792 | When either of the following continues for 0.5 seconds or more: A signal of -9.8m/s 2 to 9.8m/s 2 or less is not input from the acceleration sensor assemblies to the absorber control ECU with the engine switch on (IG). The power source voltage of the left front acceleration sensor assembly is 5.5 V or higher or 4.3 V or lower. | Left front acceleration sensor assembly Left front acceleration sensor assembly circuit Absorber control ECU |
| C1717 C1793 | When either of the following continues for 0.5 seconds or more: A signal of -9.8m/s 2 to 9.8m/s 2 or less is not input from the acceleration sensor assemblies to the absorber control ECU with the engine switch on (IG). The power source voltage of the rear acceleration sensor assembly (SBL3 terminal) is 5.5 V or higher or 4.3 V or lower. | Rear acceleration sensor assembly Rear acceleration sensor assembly circuit Absorber control ECU |
HINT
- DTC Nos. C1715 and C1791 are the right front acceleration sensor assembly.
- DTC Nos. C1716 and C1792 are the left front acceleration sensor assembly.
- DTC Nos. C1717 and C1793 are the rear acceleration sensor assembly.
- Since the right front acceleration sensor assembly is built into the absorber control ECU, replace the absorber control ECU when DTCs C1716 and C1792 are output.
Scheme 15
The absorber control actuator changes the damping forces of the absorbers according to the signal output from the absorber control ECU.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| C1725 | When either of the following is detected: An actuator open-circuit signal is detected for at least 1 second when the actuator operates. An actuator short-circuit signal is consecutively detected 8 times when the actuator operates. | Right front absorber control actuator Right front absorber control actuator circuit Absorber control ECU |
| C1726 | When either of the following is detected: An actuator open-circuit signal is detected for at least 1 second when the actuator operates. An actuator short-circuit signal is consecutively detected 8 times when the actuator operates. | Left front absorber control actuator Left front absorber control actuator circuit Absorber control ECU |
| C1727 | When either of the following is detected: An actuator open-circuit signal is detected for at least 1 second when the actuator operates. An actuator short-circuit signal is consecutively detected 8 times when the actuator operates. | Right rear absorber control actuator Right rear absorber control actuator circuit Absorber control ECU |
| C1728 | When either of the following is detected: An actuator open-circuit signal is detected for at least 1 second when the actuator operates. An actuator short-circuit signal is consecutively detected 8 times when the actuator operates. | Left rear absorber control actuator Left rear absorber control actuator circuit Absorber control ECU |
Scheme 16
Scheme 17
The absorber control ECU outputs C1761 if any malfunction occurs in the absorber control ECU itself, etc.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| C1761 | CAN communication resistor malfunction or internal absorber control ECU malfunction. | CAN communication system Absorber control ECU |
Scheme 18
- The absorber control ECU inputs the signals from the steering control ECU via CAN communication.
- The fail-safe function prohibits roll posture control if any malfunction occurs in the steering control ECU Refer to «FAIL-SAFE CHART»(ref-382796-S37624905082011012800000) .
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| C1773 | The fail flag signal is received from the steering control ECU for 5 seconds. | VGRS system CAN communication system |
Scheme 19
- This circuit provides power to operate the absorber control ECU.
- This DTC is stored when the B terminal voltage deviates from the DTC detecting condition due to a malfunction in the power supply or a charging circuit such as the battery or alternator circuit, etc.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| C1774 | The terminal B or battery voltage is below 10 V or above 16 V for 0.5 seconds. | Battery Power source circuit Absorber control ECU |
Scheme 20
- The speed sensor detects the wheel speed and transmits the appropriate vehicle speed signal to the absorber control ECU through the skid control ECU via CAN communication system.
- This DTC (C1776) is output if any malfunction exists in the speed sensor FR, FL, RR, or RL system.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| C1776 | The speed sensor malfunction signal is received for 1 second or more | CAN communication system Brake control system Speed sensor circuit Absorber control system |
Scheme 21
- The steering angle sensor detects the amount and direction of steering wheel movement and inputs these details to the absorber control ECU via CAN communication.
- The fail-safe function prohibits roll posture control if any malfunction occurs in the steering angle sensor circuit Refer to «FAIL-SAFE CHART»(ref-382796-S37624905082011012800000) .
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| C1777 | Either the steering angle sensor DTC or steering angle sensor power source DTC is received for 5 seconds or more | Steering angle sensor Steering angle sensor circuit |
Scheme 22
- The absorber control switch (EMS Switch) is a switch which selects the damping force mode of shock absorber.
- The absorber control ECU reads the changes in each signal when performing the Test Mode check and outputs the DTC (C1787) if there is no change.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| C1787 | There is no change in the absorber control switch signal when performing the Test Mode check. | Absorber control switch Absorber control switch circuit Absorber control ECU |
Scheme 23
- The absorber control ECU inputs signals from the ECM, skid control ECU, steering control ECU and steering angle sensor via CAN communication.
- When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system first.
- Check the DTC and make sure that the normal system code is output Refer to «DTC CHECK / CLEAR»(ref-382796-S22692056532011012800000) . If malfunction code is output, See procedure (Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-382796-S36130377432011012800000) ).
- If the absorber control ECU stores a DTC, the absorber control indicator light on the combination meter will come on.
- The absorber control ECU is connected to the combination meter assembly via the CAN communication system and multiplex communication system.
Scheme 24
Scheme 25
Refer to Absorber Control Indicator Light Remains ON .
The DTC output mode is set by connecting terminals TC and CG of DLC3.
The DTCs are displayed by a blinking of the absorber control indicator light.
Scheme 26
The signal check circuit detects any trouble in the sensor or switch signal which cannot be detected by the DTC check.
Connecting terminals TS and CG of the DLC3 starts the check.
