P0606

2GR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0606: ECM / PCM Processor
P0606 - ECM / PCM Processor

DESCRIPTION

The ECM continuously monitors its main and sub CPUs. This self-check ensures that the ECM is functioning properly. If outputs from the CPUs are different and deviate from the standards, the ECM will illuminate the MIL and set a DTC immediately.





NOTICE:
First check for an exhaust gas leak around the heated oxygen sensor if P0606 is present. An exhaust gas leak generates noise in the heated oxygen sensor output. The ECM may interpret this as an heated oxygen sensor transistor malfunction.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





CONFIRMATION DRIVING PATTERN

1. Connect the Techstream to the DLC3.

2. Turn the ignition switch on (IG) and turn the Techstream on.

3. Clear DTCs (even if no DTCs are stored, perform the clear DTC operation).

4. Turn the Techstream off.

5. Turn the ignition switch off.

6. Disconnect the Techstream.

7. Disconnect the cable from the negative (-) battery terminal and wait for 1 minute.

8. Connect the cable to the negative (-) battery terminal.

9. Connect the Techstream to the DLC3.

10. Turn the ignition switch on (IG) and turn the Techstream on.

11. Wait 1 second or more.

12. Enter the following menus: Powertrain / Engine / Trouble Codes.

13. Read the pending DTCs.

HINT
* If a pending DTC is output, the system is malfunctioning.
* If a pending DTC is not output, perform the following procedure.

14. Enter the following menus: Powertrain / Engine / Utility / All Readiness.

15. Input the DTC: P0606.

16. Check the DTC judgment result.





HINT
* If the judgment result shows NORMAL, the system is normal.
* If the judgment result shows ABNORMAL, the system has a malfunction.

17. If the judgment result is INCOMPLETE or UNKNOWN and no pending DTC is output, perform a universal trip and check for permanent DTCs Reading and Clearing Diagnostic Trouble Codes.

HINT
* If a permanent DTC is output, the system is malfunctioning.
* If no permanent DTC is output, the system is normal.

INSPECTION PROCEDURE

PROCEDURE

1. CHECK WHETHER DTC OUTPUT RECURS (IN ADDITION TO DTC P0606)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch on (IG).

(c) Turn the tester on.

(d) Clear the DTC.

(e) Turn the ignition switch off.

(f) Disconnect the battery negative terminal and wait for 1 minute.

(g) Connect the battery negative terminal.

(h) Turn the ignition switch on (IG).

(i) Select the following menu items: Powertrain / Engine and ECT / Trouble Code.

(j) Read the DTCs.

Result:





B -- CHECK FOR INTERMITTENT PROBLEMS Check for Intermittent Problems

A -- REPLACE ECM Components