P0606

1GR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0606: ECM / PCM Processor

DTC P0606 - ECM / PCM Processor

MONITOR DESCRIPTION

The ECM continuously monitors its main and sub CPUs. This self-check ensures that the ECM is functioning properly. If output from the CPUs are different and deviate from the standards, the ECM will illuminate the MIL and set a DTC immediately. The ECM also monitors the cruise control cancel circuit. If this circuit malfunctions, the ECM will set a DTC immediately (MIL is not illuminated).






MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





INSPECTION PROCEDURE
HINT: Read freeze frame data using the Techstream. Freeze frame data record the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data, from the time the malfunction occurred.

PROCEDURE

1. CHECK DTC
(a) Clear DTC.
(b) Turn the ignition switch off.
(c) Disconnect the cable from the negative battery terminal and wait for 1 minute.
(d) Connect the negative battery terminal.
(e) Turn the ignition switch to ON.
(f) Check DTC.
OK:
P0606 is not present.
NG -- REPLACE ECM
OK -- CHECK FOR INTERMITTENT PROBLEMS