DTC Troubleshooting: 5
LKAS Control Unit DTC 5:
 Lost Communication with EPS Control Unit
NOTE: Information marked with an asterisk ( *1 ) applies to LHD model, an asterisk ( *2 ) applies to RHD model.
  1. Clear the DTCs with the HDS.
  1. Turn the ignition switch to LOCK (0), then turn it to ON (II), and wait for 20 seconds or more.
  1. Watch the LKAS indicator.
Does the LKAS indicator come on?
YES -
Go to Step 4 .
NO -
Intermittent failure, the system is OK at this time.■
  1. Check for DTC with the HDS.
Is DTC 5 indicated?
YES -
Go to Step 5 .
NO -
Troubleshoot the indicated DTC(s).■
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect the EPS control unit connector D (28P).
  1. Turn the ignition switch to ON (II).
  1. Measure the voltage between EPS control unit connector D (28P) No. 20 terminal and body ground.
Is there battery voltage?
YES -
Repair short to power in the wire between the EPS control unit and LKAS control unit.■
NO -
Go to Step 9 .
  1. Turn the ignition switch to LOCK (0).
  1. Reconnect the EPS control unit D connector (28P).
  1. Disconnect the LKAS control unit 26P connector.
  1. Turn the ignition switch to ON (II).