DTC C1934: Front Metal Board Overheat; DTC C1935: Front Control Board Overheat: Procedure

Fig 1: Identifying Multi-Information Display

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1. Turn the engine switch on (IG).
2. Check if the multi-information display can display continuously for 30 minutes or more.
   RESULT
   
   

   Result	Proceed to
   Displays for 30 minutes or more	A
   Display turns off within 30 minutes	B

B → See step   3 

A: Go to next step 

1. Confirm the temperature around the front active stabilizer control ECU.

   HINT: 

   If there are factors causing a high temperature in the front active stabilizer control ECU, eliminate those factors, wait for the ECU to cool down, and recheck for the DTC.

   RESULT
   
   

   Result	Proceed to
   Factors causing high temperatures	A
   No factors causing high temperatures	B

A → ELIMINATE FACTORS CAUSING HIGH TEMPERATURES 

B: Go to next step 

1. Turn the engine switch off.
2. Exchange the rear active stabilizer control ECU with the front active stabilizer ECU.
3. Connect Techstream to the DLC3.
4. Turn the engine switch on (IG) and press the Techstream main switch ON.
5. Clear the DTC. Refer to DTC CHECK / CLEAR .
6. Check for DTC.
   RESULT
   
   

   Result	Proceed to
   DTC is not output	A
   DTC C190C or C190D is output	B

A → CHECK INTERMITTENT PROBLEMS 

B → See step   4