Problem Symptoms Table

Use the table below to help determine the cause of the problem symptom. The potential causes of the symptoms are listed in order of probability in the "Suspected area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
Inspect the fuse before inspecting the circuits shown in the chart below.
If any malfunction still exists even after checking and confirming that all the circuits are normal, replace the absorber control ECU.

Adaptive variable suspension system

SYMPTOM CHART

Symptom	Suspected area	See
Damping force control does not operate at all	1. Power source circuit	DTC C1774 LOW BATTERY POSITIVE VOLTAGE
	2. Acceleration sensor circuit	DTC C1715 FRONT ACCELERATION SENSOR RH; DTC C1716 FRONT ACCELERATION SENSOR LH; DTC C1717 REAR ACCELERATION SENSOR; DTC C1791 FRONT ACCELERATION SENSOR RH (TEST MODE DTC); DTC C1792 FRONT ACCELERATION SENSOR LH (TEST MODE DTC); DTC C1793 REAR ACCELERATION SENSOR (TEST MODE DTC)
	3. Absorber control actuator circuit	DTC C1725 FRONT DAMPING FORCE CONTROL ACTUATOR RH CIRCUIT; DTC C1726 FRONT DAMPING FORCE CONTROL ACTUATOR LH CIRCUIT; DTC C1727 REAR DAMPING FORCE CONTROL ACTUATOR RH CIRCUIT; DTC C1728 REAR DAMPING FORCE CONTROL ACTUATOR LH CIRCUIT
	4. Shock absorber (Front)	INSPECTION
	5. Shock absorber (Rear)	INSPECTION
	6. Vehicle speed sensor circuit	DTC C1776 SPEED SENSOR CIRCUIT
	7. Steering angle sensor circuit	DTC C1777 STEERING ANGLE SENSOR CIRCUIT
	8. CAN communication system	HOW TO PROCEED WITH TROUBLESHOOTING
	9. Absorber control ECU	ABSORBER CONTROL ECU
Only rolling control does not operate	1. Steering angle sensor circuit	DTC C1777 STEERING ANGLE SENSOR CIRCUIT
	2. Vehicle speed sensor circuit	DTC C1776 SPEED SENSOR CIRCUIT
	3. Absorber control actuator circuit	DTC C1725 FRONT DAMPING FORCE CONTROL ACTUATOR RH CIRCUIT; DTC C1726 FRONT DAMPING FORCE CONTROL ACTUATOR LH CIRCUIT; DTC C1727 REAR DAMPING FORCE CONTROL ACTUATOR RH CIRCUIT; DTC C1728 REAR DAMPING FORCE CONTROL ACTUATOR LH CIRCUIT
	4. CAN communication system	HOW TO PROCEED WITH TROUBLESHOOTING
	5. Absorber control ECU	ABSORBER CONTROL ECU
Only anti-squat control does not operate	1. Vehicle speed sensor circuit	DTC C1776 SPEED SENSOR CIRCUIT
	2. Acceleration sensor circuit	DTC C1715 FRONT ACCELERATION SENSOR RH; DTC C1716 FRONT ACCELERATION SENSOR LH; DTC C1717 REAR ACCELERATION SENSOR; DTC C1791 FRONT ACCELERATION SENSOR RH (TEST MODE DTC); DTC C1792 FRONT ACCELERATION SENSOR LH (TEST MODE DTC); DTC C1793 REAR ACCELERATION SENSOR (TEST MODE DTC)
	3. Absorber control ECU	ABSORBER CONTROL ECU
	4. Hybrid control ECU	HYBRID VEHICLE CONTROL ECU
Only anti-dive control does not operate	1. Stop light switch circuit	DTC C1249/49 OPEN IN STOP LIGHT SWITCH CIRCUIT
	2. Vehicle speed sensor circuit	DTC C1776 SPEED SENSOR CIRCUIT
	3. Acceleration sensor circuit	DTC C1715 FRONT ACCELERATION SENSOR RH; DTC C1716 FRONT ACCELERATION SENSOR LH; DTC C1717 REAR ACCELERATION SENSOR; DTC C1791 FRONT ACCELERATION SENSOR RH (TEST MODE DTC); DTC C1792 FRONT ACCELERATION SENSOR LH (TEST MODE DTC); DTC C1793 REAR ACCELERATION SENSOR (TEST MODE DTC)
	4. CAN communication system	HOW TO PROCEED WITH TROUBLESHOOTING
	5. Absorber control ECU	ABSORBER CONTROL ECU
Only speed sensor control does not operate	1. Vehicle speed sensor circuit	DTC C1776 SPEED SENSOR CIRCUIT
	2. Absorber control actuator circuit	DTC C1725 FRONT DAMPING FORCE CONTROL ACTUATOR RH CIRCUIT; DTC C1726 FRONT DAMPING FORCE CONTROL ACTUATOR LH CIRCUIT; DTC C1727 REAR DAMPING FORCE CONTROL ACTUATOR RH CIRCUIT; DTC C1728 REAR DAMPING FORCE CONTROL ACTUATOR LH CIRCUIT
	3. Absorber control ECU	ABSORBER CONTROL ECU
Only spring-bottom vibration control does not operate	1. Vehicle speed sensor circuit	DTC C1776 SPEED SENSOR CIRCUIT
	2. Acceleration sensor circuit	DTC C1715 FRONT ACCELERATION SENSOR RH; DTC C1716 FRONT ACCELERATION SENSOR LH; DTC C1717 REAR ACCELERATION SENSOR; DTC C1791 FRONT ACCELERATION SENSOR RH (TEST MODE DTC); DTC C1792 FRONT ACCELERATION SENSOR LH (TEST MODE DTC); DTC C1793 REAR ACCELERATION SENSOR (TEST MODE DTC)
	3. Absorber control actuator circuit	DTC C1725 FRONT DAMPING FORCE CONTROL ACTUATOR RH CIRCUIT; DTC C1726 FRONT DAMPING FORCE CONTROL ACTUATOR LH CIRCUIT; DTC C1727 REAR DAMPING FORCE CONTROL ACTUATOR RH CIRCUIT; DTC C1728 REAR DAMPING FORCE CONTROL ACTUATOR LH CIRCUIT
	4. Absorber control ECU	ABSORBER CONTROL ECU
Only bumpy control does not operate	1. Acceleration sensor circuit	DTC C1715 FRONT ACCELERATION SENSOR RH; DTC C1716 FRONT ACCELERATION SENSOR LH; DTC C1717 REAR ACCELERATION SENSOR; DTC C1791 FRONT ACCELERATION SENSOR RH (TEST MODE DTC); DTC C1792 FRONT ACCELERATION SENSOR LH (TEST MODE DTC); DTC C1793 REAR ACCELERATION SENSOR (TEST MODE DTC)
	2. Absorber control actuator circuit	DTC C1725 FRONT DAMPING FORCE CONTROL ACTUATOR RH CIRCUIT; DTC C1726 FRONT DAMPING FORCE CONTROL ACTUATOR LH CIRCUIT; DTC C1727 REAR DAMPING FORCE CONTROL ACTUATOR RH CIRCUIT; DTC C1728 REAR DAMPING FORCE CONTROL ACTUATOR LH CIRCUIT
	3. Shock absorber (Front)	INSPECTION
	4. Shock absorber (Rear)	INSPECTION
	5. Absorber control ECU	ABSORBER CONTROL ECU
Only VSC operation control does not operate	1. Acceleration sensor circuit	DTC C1715 FRONT ACCELERATION SENSOR RH; DTC C1716 FRONT ACCELERATION SENSOR LH; DTC C1717 REAR ACCELERATION SENSOR; DTC C1791 FRONT ACCELERATION SENSOR RH (TEST MODE DTC); DTC C1792 FRONT ACCELERATION SENSOR LH (TEST MODE DTC); DTC C1793 REAR ACCELERATION SENSOR (TEST MODE DTC)
	2. Absorber control actuator circuit	DTC C1725 FRONT DAMPING FORCE CONTROL ACTUATOR RH CIRCUIT; DTC C1726 FRONT DAMPING FORCE CONTROL ACTUATOR LH CIRCUIT; DTC C1727 REAR DAMPING FORCE CONTROL ACTUATOR RH CIRCUIT; DTC C1728 REAR DAMPING FORCE CONTROL ACTUATOR LH CIRCUIT
	3. Shock absorber (Front)	INSPECTION
	4. Shock absorber (Rear)	INSPECTION
	5. CAN communication system	HOW TO PROCEED WITH TROUBLESHOOTING
	6. Brake control system	HOW TO PROCEED WITH TROUBLESHOOTING
	7. Absorber control ECU	ABSORBER CONTROL ECU
	8. Skid control ECU	REMOVAL
DTC check cannot be completed	1. Power source circuit	DTC C1774 LOW BATTERY POSITIVE VOLTAGE
	2. CAN communication system	HOW TO PROCEED WITH TROUBLESHOOTING
	3. TC and CG terminal circuit	TC AND CG TERMINAL CIRCUIT
	4. Absorber control ECU	ABSORBER CONTROL ECU
	5. Hybrid control ECU	HYBRID VEHICLE CONTROL ECU
Test mode (signal check) cannot be completed	1. Power source circuit	DTC C1774 LOW BATTERY POSITIVE VOLTAGE
	2. CAN communication system	HOW TO PROCEED WITH TROUBLESHOOTING
	3. TS and CG terminal circuit	TC AND CG TERMINAL CIRCUIT
	4. Absorber control ECU	ABSORBER CONTROL ECU
	5. Skid control ECU	REMOVAL
SPORT indicator light (absorber control indicator light) circuit (Remains on)	1. Power source circuit	DTC C1774 LOW BATTERY POSITIVE VOLTAGE
	2. Absorber control switch circuit	DTC C1787 EMS SWITCH CIRCUIT (TEST MODE DTC)
	3. SPORT indicator light (absorber control indicator light) circuit	ABSORBER CONTROL INDICATOR LIGHT REMAINS ON
	4. Absorber control ECU	ABSORBER CONTROL ECU
SPORT indicator light (absorber control indicator light) circuit (Does not come on)	1. Power source circuit	DTC C1774 LOW BATTERY POSITIVE VOLTAGE
	2. Absorber control switch circuit	DTC C1787 EMS SWITCH CIRCUIT (TEST MODE DTC)
	3. SPORT indicator light (absorber control indicator light) circuit	ABSORBER CONTROL INDICATOR LIGHT DOES NOT COME ON
	4. Absorber control ECU	ABSORBER CONTROL ECU