Dtc C1581 Assist Map Number Un-Writing

DESCRIPTION

INSPECTION PROCEDURE

PERFORM ASSIST MAP WRITING

CHECK CAN COMMUNICATION SYSTEM

CHECK MULTIPLEX COMMUNICATION SYSTEM

CHECK ECM

CHECK NETWORK GATEWAY ECU

DESCRIPTION

HINT:

The assist map is data written in the power steering ECU assembly to control the degree of assistance. The assist map is selected based on the vehicle's specified communication data (designation and grade package information).

INSPECTION PROCEDURE

1. Turn the engine switch on (IG), and wait for 30 seconds or more.
   

   HINT:

   Assist map is automatically written when approximately 30 seconds have elapsed after the engine switch is turned on (IG). DTC C1581 will be cleared after the assist map is written.

2. Check for DTCs.
   

   OK:

   DTC C1581 is not output.
   

1. Check for DTCs of the CAN communication system (Click here).
   

   OK:

   DTCs are not output.
   

1. Check for DTCs in the multiplex communication system (Click here).
   

   OK:

   DTCs are not output.
   

1. Check if a qualified ECM is installed.
   

   OK:

   A qualified ECM is installed.
   

   NOTICE:

   Perform the RESET MEMORY (AT initialization) procedures if replacing the ECM (Click here for A761E, Click here for A960E, Click here for A760E).

1. Check if a qualified network gateway ECU is installed.
   

   OK:

   A qualified network gateway ECU is installed.
   

   NOTICE:

   If replacing the power steering ECU assembly, initialize the rotation angle sensor and calibrate the torque sensor zero point (Click here).