DTC Troubleshooting: 31

LKAS Control Unit DTC 31: System Structure Error NOTE: The adaptive cruise control (ACC)/LKAS system malfunction is detected when the control unit of different specification is installed at the following units replacing. LKAS control unit Adaptive cruise control (ACC) unit EPS (LKAS) control unit LKAS camera Clear the DTCs with the HDS. Turn the ignition switch ON (II). Select ‘‘LKAS'' on the HDS, and check the ECU ID No. 5 from the data list. Is ‘‘01'' indicated?
YES | - | The LKAS control unit is matcing the specification. Go to Step 4 .
NO | - | The LKAS control unit is different specification, check the part number and replace the LKAS control unit with the correct specification one. ■
Select ‘‘ACC'' on the HDS, and check the ECU ID No. 3 from the data list. Is ‘‘04'' indicated?
YES | - | The adaptive cruise control (ACC) unit is matcing the specification. Go to Step 5 .
NO | - | The adaptive cruise control (ACC) unit is different in the specification, check the part number and replace the adaptive cruise control (ACC) unit with the correct specification one. After the replacement, do the adaptive cruise control (ACC) unit initialization (DTC 100).■
Select ‘‘ACC'' on the HDS, and check the ECU ID No. 7 from the data list. Is ‘‘01'' indicated?
YES | - | The adaptive cruise control (ACC) unit is matcing the specification. Go to Step 6 .
NO | - | The adaptive cruise control (ACC) unit is different in the specification, check the part number and replace the adaptive cruise control (ACC) unit with the correct specification one. After the replacement, do the adaptive cruise control (ACC) unit initialization (DTC 100).■
Select ‘‘EPS'' on the HDS, and check the ECU ID No. 5 from the data list. Is ‘‘64'' indicated?
YES | - | The EPS (LKAS) control unit is matcing the specification. Go to Step 7 .
NO | - | The EPS (LKAS) control unit is different specification, check the part number and replace the EPS (LKAS) control unit with the correct specification one. ■
Select ‘‘LKAS Camera'' on the HDS, and check the ECU ID No. 1 from the data list. Is ‘‘01'' indicated?
YES | - | The LKAS camera is matcing the specification. Go to Step 8 .
NO | - | The LKAS camera is different in the specification, check the part number and replace the LKAS camera with the correct specification one. After the replacement, do the LKAS camera adjustment (aiming). ■
Select ‘‘LKAS Camera'' on the HDS, and check the ECU ID No. 5 from the data list. Is ‘‘02'' indicated?
YES | - | The LKAS camera is matcing the specification.■
NO | - | The LKAS camera is different in the specification, check the part number and replace the LKAS camera with the correct specification one. After the replacement, do the LKAS camera adjustment (aiming). ■