DTC Detection Logic

[B2521] ECU circuit

DTC DETECTION CONDITION CHART

Error detection condition

DTC erase condition

Possible cause

AFS control unit indicates an applicable DTC when detecting any of the following conditions continuously for 2 seconds or more.
- The swivel position sensor is shorted to the power supply or the ground.
- The swivel position sensor signal is shorted to the ground.
- The height sensor power supply is shorted to the power supply or the ground.
- The height sensor signal is shorted to the ground.
AFS control unit RAM/ROM error

Ignition switch OFF

Swivel position sensor

Swivel position sensor
Harness and connector
AFS control unit

Height sensor

Height sensor
Harness and connector
AFS control unit

AFS control unit (RAM/ROM)

AFS control unit