Diagnosis Procedure

1. Turn ignition switch ON.
2. Connect CONSULT and check for "ENGINE" diagnostic trouble codes.
3. Check for DTC P0581-00 being current on the CONSULT screen.

Is DTC P0581-00 detected as current?

YES

GO TO 2 .

NO

Refer to Intermittent Incident .

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector E93.
3. Inspect the ECM connector pins for the following:
   • Loose connector
   • Corroded pins
   • Bent or broken pins
   • Pushed back or expanded pins
   • Moisture in or on the connector
   • Missing or damaged connector seals
   • Dirt or debris on or in the connector pins
   • Connector shell broken
   • Wire insulation damage
   • Damaged connector locking tab

Is the inspection result normal?

YES

GO TO 3 .

NO

Repair or replace error-detected parts.

1. Disconnect ASCD steering switch connector M30.
2. Check resistance between ECM connector E93 and ASCD steering switch connector M30.
   With Heated Steering Wheel
   
   

   ECM		ASCD steering switch		Resistance
   Connector	Terminal	Connector	Terminal
   E93	59	M30	10	< 10 Ω

   Without Heated Steering Wheel
   
   

   ECM		ASCD steering switch		Resistance
   Connector	Terminal	Connector	Terminal
   E93	59	M30	9	< 10 Ω

Is the inspection result normal?

YES

GO TO 4 .

NO

Repair or replace the harness.

Check resistance between ECM connector terminals.

Is the inspection result normal?

YES

GO TO 5 .

NO

Repair or replace the harness.

1. Connect all components.
2. Turn ignition switch ON.
3. Connect CONSULT and check for "ENGINE" diagnostic trouble codes.
4. Check for DTC P0581-00 being past on the CONSULT screen.

Is DTC P0581-00 detected as past?

YES

Refer to Intermittent Incident .

NO

Replace the ASCD steering switch. Refer to Removal and Installation .