P0606
2GR-FSE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0606: ECM / PCM Processor
P0606 - ECM / PCM Processor
DESCRIPTION
The ECM continuously monitors its internal processors (CPUs), heated oxygen sensor transistors. This self-check ensures that the ECM is functioning properly.
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 a heated oxygen sensor transistor malfunction.
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: Powertrain / 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, P0138, P0156, P0157 OR P0158)
(a) Inspect the P0136, P0137, P0138, P0156, P0157 or P0158 flow chart.
HINT
- If P0136 or P0156 is output, troubleshoot for that DTC first P0136. Then proceed to "Inspect ECM".
- If P0137or P0157 is output, troubleshoot for that DTC first P0136. Then proceed to "Inspect ECM".
- If P0138 or P0158 is output, troubleshoot for that DTC first P0136. 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 -- 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 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 -- 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 50 mph (80 km/h) and stop the vehicle.
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
(2) Drive the vehicle between 38 and 50 mph (60 and 80 km/h) for 5 minutes.
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
(g) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
(h) Read the DTCs.
Result:
C -- INSPECT ECM
B -- REPLACE ECM Removal
A -- Continue to next step.
5. INSPECT DTC (P0136, P0137, P0138, P0156, P0157 OR P0158)
(a) Inspect the P0136, P0137, P0138, P0156, P0157 or P0158 flow chart.
HINT
- If P0136 or P0156 is output, troubleshoot for that DTC first P0136. Then proceed to "Inspect ECM".
- If P0137or P0157 is output, troubleshoot for that DTC first P0136. Then proceed to "Inspect ECM".
- If P0138 or P0158 is output, troubleshoot for that DTC first P0136. 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 -- 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) Put the engine in inspection mode Inspection Mode Procedure.
(e) Start the engine and allow it to idle for 2 minutes.
(f) Turn the Techstream on.
(g) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
(h) Read the DTCs.
Result:
B -- REPLACE ECM Removal
A -- END