SFI System

1GR-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), A/F sensor transistors and heated oxygen sensor (HO2S) transistors. This self-check ensures that the ECM is functioning properly. These are diagnosed by internal "mirroring" of the main and sub CPUs to detect the processors error. If outputs from the processors deviate from the standards, the ECM will illuminate the MIL and set a DTC immediately.






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 FOR EXHAUST GAS LEAK
(a) Allow the engine to idle.
(b) Check for an exhaust gas leak around the HO2S.
OK:
No leak from the HO2S.
NG -- REPAIR LEAK
OK -- Continue to next step.

2. CHECK HEATED OXYGEN SENSOR
(a) Warm up the engine.




(b) Allow the engine to idle.
(c) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor.
(d) Check the O2S B1S2 (O2S B2S2) values when the Control the Injection Volume for A/F Sensor is -12.5% (Lean fuel-trim).
(e) Check the O2S B1S2 (O2S B2S2) values when the Control the Injection Volume for A/F Sensor is 25% (Rich fuel-trim).
Standard:






NG -- REPLACE HEATED OXYGEN SENSOR
OK -- Continue to next step.

3. 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) Start the engine.




(f) Perform the drive pattern.
(1) Warm up the engine.
(2) Accelerate the vehicle until 50 mph (80 km/h) and stop the vehicle.
(3) Drive the vehicle by 35 to 50 mph (60 to 80 km/h) for 5 minutes or more.
(g) Check DTC.
OK:
P0607 is not present.
NG -- REPLACE ECM
OK -- CHECK FOR INTERMITTENT PROBLEMS