ACTIVE HEIGHT CONTROL SUSPENSION TEST MODE PROCEDURE

TEST MODE PROCEDURE
Tech Tips
- When entering the test mode, the suspension control ECU stores all the test mode DTCs first. After completing the test mode for each check item, the test mode DTCs that are determined to be normal by the suspension control ECU will be cleared. The test mode DTCs for other check items may not be cleared when only a certain signal is inspected.
- When the test mode returns back to the normal mode, all the test mode DTCs will be cleared.
1. Turn the engine switch off.
2. Connect the intelligent tester to the DLC3.
3. Turn the engine switch on (IG) and the tester on.
4. Enter the following menus: Chassis / AHC / Utility / Signal Check.
5. Read the test mode DTCs by following the prompts on the tester screen.
6. After completing the test mode, disconnect the tester and turn the engine switch off.

TEST MODE DTC CHART

Tech Tips

When entering test mode, the suspension control ECU outputs all the test mode DTCs. If the clear conditions for a test mode DTC are met, it is cleared.

If a trouble code is output during the test mode DTC check, check the circuit listed for that code. For details of each code, refer to the "See page" for the respective DTC code in the chart.

DTC Code	Detection Item	Clear Condition	See page
C1791	Damping force control switch circuit malfunction	When each position (COMF/NORMAL/SPORT) of the damping force control switch is detected.	Click here
C1792	Height control switch circuit malfunction	When the height control switch up and down operation is detected.	Click here
C1794	Height control off switch circuit malfunction	When the signal of the height control OFF switch is detected.	Click here
C1796	Front acceleration sensor RH circuit malfunction	On a level surface, the G sensor input is +/-1.96 m/s²for 1 second.	Click here
C1797	Front acceleration sensor LH circuit malfunction
C1798	Rear acceleration sensor circuit malfunction