P0607

2UR-GSE ENGINE CONTROL: SFI SYSTEM: P0607: Control Module Performance

DTC P0607 - Control Module Performance

MONITOR DESCRIPTION

The ECM continuously monitors its internal processors (CPUs), air fuel ratio sensor transistors and heated oxygen sensor transistors built into the ECM. This self-check ensures that the ECM is functioning properly. This is diagnosed by internal "mirroring" of the main and sub CPUs to detect processor errors. If outputs from the processors deviate from the standards, the ECM will illuminate the MIL and set the DTC immediately.





NOTICE: An exhaust gas leak generates electrical noise in the heated oxygen sensor output. The ECM may interpret this as an heated oxygen sensor transistor malfunction and set P0607.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FOR EXHAUST GAS LEAK
(a) Allow the engine to idle.
(b) Check for exhaust gas leaks around the heated oxygen sensor.
OK:
No leaks from the heated oxygen sensor.
NG -- REPAIR OR REPLACE EXHAUST GAS LEAK POINT
OK -- Continue to next step.
2. INSPECT HEATED OXYGEN SENSOR





(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream ON.
(d) Start the engine and warm it up.
(e) Allow the engine to idle.
(f) Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor.
(g) Check the O2S B1S2 values when the Control the Injection Volume for A/F Sensor is -12.5% (Lean fuel trim).
(h) Check the O2S B1S2 values when the Control the Injection Volume for A/F Sensor is 25% (Rich fuel trim).
Standard Voltage:






NG -- REPLACE HEATED OXYGEN SENSOR
OK -- Continue to next step.
3. CHECK WHETHER DTC OUTPUT RECURS (DTC P0607)
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream ON.
(d) Clear DTCs DTC Check / Clear.
(e) Turn the engine switch to off and turn the Techstream off.
(f) Disconnect the Techstream.
(g) Disconnect the cable from the negative (-) battery terminal and wait for 1 minute.
(h) Connect the cable to the negative (-) battery terminal.
(i) Connect the Techstream to the DLC3.
(j) Turn the engine switch on (IG).
(k) Turn the Techstream ON.
(l) Start the engine.





(m) Perform the drive pattern.
(1) Warm up the engine.
(2) Accelerate the vehicle until 80 km/h (50 mph) and stop the vehicle.
(3) Drive the vehicle by 60 to 80 km/h (35 to 50 mph) for 5 minutes or more.
(n) Enter the following menus: Powertrain / Engine / Trouble Codes.
(o) Read the DTCs.
Result:






B -- REPLACE ECM
A -- CHECK FOR INTERMITTENT PROBLEMS