Toyota RAV4 manuals

Toyota Sienna Service Manual: ECM / PCM Processor

DTC P0606 ECM / PCM Processor

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.

DESCRIPTION

MONITOR STRATEGY

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

TYPICAL MALFUNCTION THRESHOLDS

INSPECTION PROCEDURE

1 INSPECT FOR EXHAUST GAS LEAK

  1. Allow the engine to idle.
  2.  Check for exhaust gas leak around the heated oxygen sensor.

OK: No leak from the heated oxygen sensor.

2 CHECK HEATED OXYGEN SENSOR

 CHECK HEATED OXYGEN SENSOR

  1. Connect the intelligent tester to the DLC3.
  2.  Start the engine and turn the tester on.
  3.  Warm up the engine at an engine speed of 2500rpm for approximately 90 seconds.
  4.  Enter the following menus: DIAGNOSIS / ENHANCED II / ACTIVE TEST / A/F CONTROL.
  5.  Perform the A/F CONTROL operation with the engine in an idling condition (press the RIGHT or LEFT button to change the fuel injection volume).
  6.  Monitor the voltage outputs of the HO2 sensors (O2S B1S2) displayed on the tester.

HINT:

Standard voltage

Standard voltage

Result

Result

3 CHECK WHETHER DTC OUTPUT RECURS (IN ADDITION TO DTC P0606)

CHECK WHETHER DTC OUTPUT RECURS

  1. Connect the intelligent tester to the DLC3.
  2.  Turn the ignition switch to the ON position.
  3.  Turn the tester on.
  4.  Clear the DTC.
  5. Turn the ignition switch off.
  6. Disconnect the battery negative terminal and wait for 1 minute.
  7. Connect the battery negative terminal.
  8. Start the engine.
  9. Perform the drive pattern.
  1. Warm up the engine.
  2. Accelerate the vehicle to 50 mph (80 km/h) and stop the vehicle.
  3. Drive the vehicle at 35 to 50 mph (60 to 80 km/h) for 5 minutes or more.
  1.  Enter the following menus: DIAGNOSIS / ENHANCED II / DTC INFO / CURRENT CODES.
  2. Read the DTCs.

Result

Result

REPLACE ECM

Internal Control Module Random Access Memory (RAM) Error
DTC P0604 Internal Control Module Random Access Memory (RAM) Error DESCRIPTION The ECM continuously monitors its own internal memory status, internal circuits, and output signals transmitted to ...

Control Module Performance
DTC 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 di ...

Other materials:

Inspection
1. INSPECT SHOCK ABSORBER ASSEMBLY FRONT LH (a) Compress and extend the shock absorber rod and check that there is no unusual resistance or unusual sound during operation. If there is any abnormality, replace the shock absorber assembly front LH with a new one. NOTICE: When disposing of ...

TC and CG Terminal Circuit
DESCRIPTION DTC output mode is set by connecting terminals TC and CG of the DLC3. The DTCs are displayed by the blinking pattern of the ABS warning light. WIRING DIAGRAM HINT: When warning lights continue to blink, a ground short in the wiring of terminal TC of the DLC3 or an internal ...

Symptom confirmation and diagnostic trouble code
HINT: The diagnostic system in the SIENNA has various functions. The first function is the Diagnostic Trouble Code (DTC) check. A DTC is a code stored in the ECU memory whenever a malfunction in the signal circuits to the ECU occurs. In a DTC check, a previous malfunction's DTC can be ...

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