DTC P0606: ECM / PCM Processor: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the tester on.
4. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
5. Read the DTCs.

   Result

   Result	Proceed to
   P0606 and P0136, P0137, P0138, P0156, P0157 or P0158	A
   P0606	B

B → See step   3 

A: Go to next step 

1. Inspect the P0136, P0137, P0138, P0156, P0157 or P0158 flowchart.

   HINT: 

   • If P0136 or P0156 is output, troubleshoot for that DTC first. Refer to DTC P0136: Oxygen Sensor Circuit Malfunction (Bank 1 Sensor 2); DTC P0137: Oxygen Sensor Circuit Low Voltage (Bank 1 Sensor 2); DTC P0138: Oxygen Sensor Circuit High Voltage (Bank 1 Sensor 2); DTC P0139: Oxygen Sensor Circuit Slow Response (Bank 1 Sensor 2); DTC P0156: Oxygen Sensor Circuit Malfunction (Bank 2 Sensor 2); DTC P0157: Oxygen Sensor Circuit Low Voltage (Bank 2 Sensor 2); DTC P0158: Oxygen Sensor Circuit High Voltage (Bank 2 Sensor 2); DTC P0159: Oxygen Sensor Circuit Slow Response (Bank 2 Sensor 2) . Then proceed to "INSPECT ECM".
   • If P0137or P0157 is output, troubleshoot for that DTC first. Refer to DTC P0136: Oxygen Sensor Circuit Malfunction (Bank 1 Sensor 2); DTC P0137: Oxygen Sensor Circuit Low Voltage (Bank 1 Sensor 2); DTC P0138: Oxygen Sensor Circuit High Voltage (Bank 1 Sensor 2); DTC P0139: Oxygen Sensor Circuit Slow Response (Bank 1 Sensor 2); DTC P0156: Oxygen Sensor Circuit Malfunction (Bank 2 Sensor 2); DTC P0157: Oxygen Sensor Circuit Low Voltage (Bank 2 Sensor 2); DTC P0158: Oxygen Sensor Circuit High Voltage (Bank 2 Sensor 2); DTC P0159: Oxygen Sensor Circuit Slow Response (Bank 2 Sensor 2) . Then proceed to "INSPECT ECM".
   • If P0138 or P0158 is output, troubleshoot for that DTC first. Refer to DTC P0136: Oxygen Sensor Circuit Malfunction (Bank 1 Sensor 2); DTC P0137: Oxygen Sensor Circuit Low Voltage (Bank 1 Sensor 2); DTC P0138: Oxygen Sensor Circuit High Voltage (Bank 1 Sensor 2); DTC P0139: Oxygen Sensor Circuit Slow Response (Bank 1 Sensor 2); DTC P0156: Oxygen Sensor Circuit Malfunction (Bank 2 Sensor 2); DTC P0157: Oxygen Sensor Circuit Low Voltage (Bank 2 Sensor 2); DTC P0158: Oxygen Sensor Circuit High Voltage (Bank 2 Sensor 2); DTC P0159: Oxygen Sensor Circuit Slow Response (Bank 2 Sensor 2) . Then proceed to "INSPECT ECM".
   • If DTC P0606 and P0136, P0137, P0138, P0156, P0157 or P0158 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 it and proceed to "PERFORM CONFIRMATION DRIVING PATTERN". If no exhaust gas leaks are present, proceed to "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. Start the engine.
4. Turn the Techstream on.
5. Warm up the engine until the engine coolant temperature becomes 75° (167°F) or more.
6. Perform the driving pattern.
   Fig 1: Identifying Monitor Drive Pattern For P0606

   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 38 to 50 mph (60 to 80 km/h) for 5 minutes.
7. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
8. Read the DTCs.

   Result

   Result	Proceed to
   P0606 and P0136, P0137, P0138, P0156, P0157 or P0158	A
   P0606	B
   No output	C

C → See step   6 

B → REPLACE ECM 

A: Go to next step 

1. Inspect the P0136, P0137, P0138, P0156, P0157 or P0158 flowchart.

   HINT: 

   • If P0136 or P0156 is output, troubleshoot for that DTC first. Refer to DTC P0136: Oxygen Sensor Circuit Malfunction (Bank 1 Sensor 2); DTC P0137: Oxygen Sensor Circuit Low Voltage (Bank 1 Sensor 2); DTC P0138: Oxygen Sensor Circuit High Voltage (Bank 1 Sensor 2); DTC P0139: Oxygen Sensor Circuit Slow Response (Bank 1 Sensor 2); DTC P0156: Oxygen Sensor Circuit Malfunction (Bank 2 Sensor 2); DTC P0157: Oxygen Sensor Circuit Low Voltage (Bank 2 Sensor 2); DTC P0158: Oxygen Sensor Circuit High Voltage (Bank 2 Sensor 2); DTC P0159: Oxygen Sensor Circuit Slow Response (Bank 2 Sensor 2) . Then proceed to "INSPECT ECM".
   • If P0137or P0157 is output, troubleshoot for that DTC first. Refer to DTC P0136: Oxygen Sensor Circuit Malfunction (Bank 1 Sensor 2); DTC P0137: Oxygen Sensor Circuit Low Voltage (Bank 1 Sensor 2); DTC P0138: Oxygen Sensor Circuit High Voltage (Bank 1 Sensor 2); DTC P0139: Oxygen Sensor Circuit Slow Response (Bank 1 Sensor 2); DTC P0156: Oxygen Sensor Circuit Malfunction (Bank 2 Sensor 2); DTC P0157: Oxygen Sensor Circuit Low Voltage (Bank 2 Sensor 2); DTC P0158: Oxygen Sensor Circuit High Voltage (Bank 2 Sensor 2); DTC P0159: Oxygen Sensor Circuit Slow Response (Bank 2 Sensor 2) . Then proceed to "INSPECT ECM".
   • If P0138 or P0158 is output, troubleshoot for that DTC first. Refer to DTC P0136: Oxygen Sensor Circuit Malfunction (Bank 1 Sensor 2); DTC P0137: Oxygen Sensor Circuit Low Voltage (Bank 1 Sensor 2); DTC P0138: Oxygen Sensor Circuit High Voltage (Bank 1 Sensor 2); DTC P0139: Oxygen Sensor Circuit Slow Response (Bank 1 Sensor 2); DTC P0156: Oxygen Sensor Circuit Malfunction (Bank 2 Sensor 2); DTC P0157: Oxygen Sensor Circuit Low Voltage (Bank 2 Sensor 2); DTC P0158: Oxygen Sensor Circuit High Voltage (Bank 2 Sensor 2); DTC P0159: Oxygen Sensor Circuit Slow Response (Bank 2 Sensor 2) . Then proceed to INSPECT ECM".
   • If DTC P0606 and P0136, P0137, P0138, P0156, P0157 or P0158 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 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
   No output	A
   P0606	B

B → REPLACE ECM 

A → END