P0607

2AZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0607: Control Module Performance

DTC P0607 - Control Module Performance

MONITOR DESCRIPTION

The ECM continuously monitors its internal processors (CPUs), Air Fuel Ratio (A/F) sensor transistors and Heated Oxygen (HO2) 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 noise in the HO2 sensor output. The ECM may interpret this as an HO2 sensor transistor malfunction and set P0607.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





INSPECTION PROCEDURE

PROCEDURE

1. CHECK FOR EXHAUST GAS LEAK
(a) Allow the engine to idle.
(b) Check for exhaust gas leak around the HO2 sensor.
OK:
No leak from the HO2 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 ignition switch to ON.
(c) Turn the Techstream ON.
(d) Start the engine and warm it up.
(e) Allow the engine to idle.
(f) Select the following menu items: Powertrain / Engine and ECT 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 ignition switch to ON.
(c) Turn the Techstream ON.
(d) Clear DTC DTC Check / Clear.
(e) Turn the ignition switch to OFF and turn the Techstream OFF.
(f) Disconnect the Techstream.
(g) Disconnect the cable from the battery negative (-) terminal and wait for 1 minute.
(h) Connect the cable to the battery negative (-) terminal.
(i) Connect the Techstream to the DLC3.
(j) Turn the ignition switch to ON.
(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) Select the following menu items: Powertrain / Engine and ECT / Trouble Codes.
(o) Read DTCs.

Result





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