3UZ-FE Engine Control System

3UZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0607: Control Module Performance
P0607 - Control Module Performance

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 standard, 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).





HINT
The MIL does not illuminate when a malfunction is detected in the cruise control cancel switch circuit of the ECM. It illuminate when a malfunction is detected in the main CPU and sub CPU of the ECM.

INSEPCTION PROCEDURE

PROCEDURE

1. CHECK DTC

(a) Clear DTCs.

(b) Turn the ignition switch OFF.

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

(d) Connect the cable to the negative battery terminal.

(e) Turn the ignition switch to ON.

(f) Read the DTCs.

OK:

P0607 is not present.

NG -- REPLACE ECM Service and Repair

OK -- CHECK FOR INTERMITTENT PROBLEMS