DTC P0606: ECM / PCM Processor: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
5. Read DTCs.

   Result

   Result	Proceed to
   P0606, and P0136, P0137 or P0138 are output	A
   P0606 is output	B

B → See step   3 

A: Go to next step 

1. Check the P0136, P0137 or P0138 flow chart.

   HINT: 

   • If P0136 is output, troubleshoot for that DTC first. Refer to DTC P0136 . Then proceed to step  6 of "INSPECT ECM".
   • If P0137 is output, troubleshoot for that DTC first. Refer to DTC P0137 . Then proceed to step  6 of "INSPECT ECM".
   • If P0138 is output, troubleshoot for that DTC first. Refer to DTC P0138 . Then proceed to step  6 of "INSPECT ECM".
   • If DTC P0606 and P0136, P0137 or P0138 are output, the output voltage of the heated oxygen sensor may remain close to 0 V or become high (around 1 V or more).

NEXT → See step   6 

1. Allow the engine to idle and rev the engine.
2. Check for exhaust gas leaks around the heated oxygen sensor.

   If any exhaust gas leaks are present, repair them and proceed to step 4 of "PERFORM CONFIRMATION DRIVING PATTERN". If no exhaust gas leaks are present, proceed to step 4 of "PERFORM CONFIRMATION DRIVING PATTERN".

   HINT: 

   • If no exhaust gas leaks are present, a malfunction in the heated oxygen sensor circuit is suspected.
   • If any exhaust gas leaks are present around the heated oxygen sensor, noise appears in the output voltage of the heated oxygen sensor.

NEXT: Go to next step 

1. Clear the DTC. Refer to DTC CHECK / CLEAR .
2. Connect the Techstream to the DLC3.
3. Warm up the engine until the engine coolant temperature becomes 75° (167°F) or more.
4. Perform the driving pattern.
   Fig 1: Driving Pattern Of Engine Coolant Temperature

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Accelerate the vehicle to 50 mph (80 km/h) and stop the vehicle.
   2. Drive the vehicle between 35 and 50 mph (60 and 80 km/h) for 5 minutes.
5. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
6. Read DTCs.

   Result

   Result	Proceed to
   P0606, and P0136, P0137 or P0138 are output	A
   P0606 is output	B
   No output	C

C → See step   6 

B → See step   7 

A: Go to next step 

1. Check the P0136, P0137 or P0138 flow chart.

   HINT: 

   • If P0136 is output, troubleshoot for that DTC first. Refer to DTC P0136 . Then proceed to step  6 of "INSPECT ECM".
   • If P0137 is output, troubleshoot for that DTC first. Refer to DTC P0137 . Then proceed to step  6 of "INSPECT ECM".
   • If P0138 is output, troubleshoot for that DTC first. Refer to DTC P0138 . Then proceed to step  6 of "INSPECT ECM".
   • If DTC P0606 and P0136, P0137 or P0138 are output, the output voltage of the heated oxygen sensor may remain close to 0 V or become high (around 1 V or more).

NEXT: Go to next step 

1. Clear the DTC. Refer to DTC CHECK / CLEAR .
2. Stop the engine and wait for 30 minutes.
3. Connect the Techstream to the DLC3.
4. Start the engine and allow it to idle for 2 minutes.
5. Turn the Techstream on.
6. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
7. Read DTCs.

   Result

   Result	Proceed to
   P0606	A
   No output	B

B → END 

A → See step   7