DTC Troubleshooting: 25

Adaptive Cruise Control (ACC) Unit DTC 25: Yaw Rate Sensor Stabilizing Malfunction NOTE: If DTC 112 is stored at the same time as DTC 25, troubleshoot DTC 112 first, then recheck for DTC 25.

1. Check for VSA system DTCs with the HDS.

Are any DTCs indicated?

YES | - | Troubleshoot the indicated VSA system DTC(s).■
NO | - | Go to Step 2 .

1. Clear the DTCs with the HDS.

1. Test-drive the vehicle at 45 km/h (28 mph) or more, and turn the main switch ON.

1. Test-drive with the adaptive cruise control (ACC) activated, and watch the adaptive cruise control (ACC)/LKAS indicator.

Does the adaptive cruise control (ACC)/LKAS indicator come on?

YES | - | Go to Step 5 .
NO | - | Intermittent failure. The system is OK at this time. Check for loose or poor connections.■

1. Check for DTCs with the HDS.

Is DTC 25 indicated?

YES | - | Go to Step 6 .
NO | - | Troubleshoot the indicated DTC.■

1. Test-drive the vehicle in a straight line with the adaptive cruise control (ACC) activated, check YAW RATE S with the HDS.

Is about 2.5 V indicated?

YES | - | Go to Step 7 .
NO | - | Go to VSA system troubleshooting. ■

1. Turn right with the adaptive cruise control activated, and check YAW RATE S with the HDS.

Does the voltage increase from 2.5 V?

YES | - | Go to Step 8 .
NO | - | Go to VSA system troubleshooting. ■

1. Turn left with the adaptive cruise control (ACC) activated, and check YAW RATE S with the HDS.

Does the voltage decrease from 2.5 V?

YES | - | The yaw rate sensor signal is OK, check for loose or poor connections. If OK, replace the adaptive cruise control (ACC) unit. ■
NO | - | Go to VSA system troubleshooting. ■