P0606

1NZ-FXE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0606: ECM / PCM Processor

DTC P0606 - ECM / PCM Processor

DESCRIPTION

The ECM continuously monitors its internal processors (CPUs) and heated oxygen HO2 sensor transistors. This self-check ensures that the ECM is functioning properly.






MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





INSPECTION PROCEDURE

PROCEDURE

1. CHECK ANY OTHER DTCS OUTPUT
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch ON (IG).
(c) Turn the tester on.
(d) Enter the following menus: Power train / Engine and ECT / Trouble Codes.
(e) Read the DTCs.
Result:






B -- CHECK FOR EXHAUST GAS LEAK
A -- Continue to next step.

2. INSPECT DTC (P0136, P0137 OR P0138)
(a) Inspect the P0136, P0137 or P0138 flow chart.
HINT:
- If 0136 is output, troubleshoot for that DTC first P0136. Then proceed to "INSPECT ECM".
- If 0137 is output, troubleshoot for that DTC first P0136. Then proceed to "INSPECT ECM".
- If 0138 is output, troubleshoot for that DTC first P0136. Then proceed to "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 -- INSPECT ECM
3. CHECK FOR EXHAUST GAS LEAK
(a) Allow the engine to idle and rev the engine.
(b) 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 present proceed to "PERFORM CONFIRMATION DRIVING PATTERN".

- 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 -- Continue to next step.

4. PERFORM CONFIRMATION DRIVING PATTERN




(a) Clear the DTC DTC Check / Clear.
(b) Connect the Techstream to the DLC3.
(c) Start the engine.
(d) Turn the Techstream on.
(e) Warm up the engine until the engine coolant temperature becomes 75°(167°F) or more.
(f) Perform the driving pattern.
(1) Accelerate the vehicle to 80 km/h (50 mph) and stop the vehicle.
(2) Drive the vehicle between 60 and 80 km/h (38 and 50 mph) for 5 minutes.
(g) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
(h) Read the DTCs.
Result:






C -- INSPECT ECM
B -- REPLACE ECM
A -- Continue to next step.

5. INSPECT DTC (P0136, P0137 OR P0138)
(a) Inspect the P0136, P0137 or P0138 flow chart.
HINT:
- If 0136 is output, troubleshoot for that DTC first P0136. Then proceed to "INSPECT ECM".
- If 0137 is output, troubleshoot for that DTC first P0136. Then proceed to "INSPECT ECM".
- If 0138 is output, troubleshoot for that DTC first P0136. Then proceed to "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 -- Continue to next step.

6. INSPECT ECM
(a) Clear the DTC DTC Check / Clear.
(b) Stop the engine and wait for 30 minutes.
(c) Connect the Techstream to the DLC3.
(d) Start engine and allow it to idle for 2 minutes.
(e) Turn the tester on.
(f) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
(g) Read the DTCs.
Result:






B -- REPLACE ECM
A -- END