Engine Control System - SFI System

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

DTC P0607 - Control Module Performance

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. This is diagnosed by internal "mirroring" of the main and sub CPUs to detect processor errors. If outputs from the processors deviate from the standard, the ECM will illuminate the MIL and set a DTC immediately.





NOTE: An exhaust gas leak generates noise in the HO2S output. The ECM may interpret this as an HO2S 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 leak around the HO2S.
OK:
No leak from the HO2S.
NG -- REPAIR LEAK
OK -- Continue to next step.
2. CHECK HEATED OXYGEN SENSOR





(a) Put the engine in inspection mode Inspection Mode Procedure.
(b) Warm up the engine.
(c) Allow the engine to idle.
(d) Enter the following menus:
(1) Intelligent tester - Select: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / A/F CONTROL.
(2) Techstream - Select: Powertrain / Engine and ECT Active Test / Control the Injection Volume for A/F Sensor.
(e) Check the O2S B1S2 (O2S B2S2) values when the A/F CONTROL (Control the Injection Volume for A/F Sensor) is -12.5% (Lean fuel-trim).
(f) Check the O2S B1S2 (O2S B2S2) values when the A/F CONTROL (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 DTC Check / Clear.
(b) Turn the power 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 power switch ON (READY).





(f) 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.
(g) Check DTC.
OK:
P0607 is not present.
NG -- REPLACE ECM
OK -- CHECK FOR INTERMITTENT PROBLEMS