Subaru Crosstrek manuals

Subaru Crosstrek Service Manual: Dtc p0606 control module processor

ENGINE (DIAGNOSTICS)(H4DO) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)

DTC P0606 CONTROL MODULE PROCESSOR

DTC detecting condition:

Immediately at fault recognition

Trouble symptom:

Improper idling

Poor driving performance

CAUTION:

After servicing or replacing faulty parts, perform Clear Memory Mode Clear Memory Mode > OPERATION">, and Inspection Mode Inspection Mode > PROCEDURE">.

Wiring diagram:

Engine electrical system Engine Electrical System">

STEPCHECKYESNO

1.CHECK INPUT VOLTAGE OF ECM.

1) Turn the ignition switch to ON.

2) Measure the voltage between ECM connector and chassis ground.

Connector & terminal

(B136) No. 6 (+) — Chassis ground (−):

(B137) No. 1 (+) — Chassis ground (−):

Is the voltage 10 — 13 V?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0606 CONTROL MODULE PROCESSOR">Go to Step 2.

Repair the open or short to ground in the power supply circuit.

2.CHECK INPUT VOLTAGE OF ECM.

1) Start the engine.

2) Measure the voltage between ECM connector and chassis ground.

Connector & terminal

(B136) No. 6 (+) — Chassis ground (−):

(B137) No. 1 (+) — Chassis ground (−):

Is the voltage 13 — 15 V?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0606 CONTROL MODULE PROCESSOR">Go to Step 3.

Repair the open or short to ground in the power supply circuit.

3.CHECK HARNESS BETWEEN ECM AND ELECTRONIC THROTTLE CONTROL CONNECTOR.

1) Turn the ignition switch to OFF.

2) Disconnect the connector from ECM.

3) Disconnect the connectors from electronic throttle control.

4) Measure the resistance of harness between ECM connector and electronic throttle control connector.

Connector & terminal

(B134) No. 19 — (E57) No. 5:

(B134) No. 29 — (E57) No. 3:

Is the resistance less than 1 ??

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0606 CONTROL MODULE PROCESSOR">Go to Step 4.

Repair the harness and connector.

NOTE:

In this case, repair the following item:

Open circuit in harness between ECM connector and electronic throttle control connector

Poor contact of coupling connector

4.CHECK ECM GROUND HARNESS.

1) Connect all connectors.

2) Turn the ignition to ON.

3) Measure the voltage between ECM connector and chassis ground.

Connector & terminal

(B134) No. 3 (+) — Chassis ground (−):

(B134) No. 4 (+) — Chassis ground (−):

(B136) No. 1 (+) — Chassis ground (−):

(B136) No. 2 (+) — Chassis ground (−):

(B136) No. 3 (+) — Chassis ground (−):

Is the voltage less than 1 V?

Check the connector for poor contact and check the harness.
Replace the ECM if no fault is found. Engine Control Module (ECM)">

Repair the harness and connector.

NOTE:

In this case, repair the following item:

Open circuit in ground circuit

Further tightening of the engine ground terminal

Poor contact of coupling connector

1. OUTLINE OF DIAGNOSIS

Judge as NG when any one of the followings is established.

(1) If the CPU operation is abnormal (instruction/flow check).

(2) If the output IC operation is abnormal (output driver malfunction).

2. COMPONENT DESCRIPTION

(1)

Throttle position sensor

(6)

Accelerator pedal position sensor 2

(10)

CPU

(2)

Throttle position sensor 1

(7)

I/F circuit

(11)

Monitoring IC

(3)

Throttle position sensor 2

(8)

Amplifier circuit

(12)

EEPROM

(4)

Accelerator pedal position sensor

(9)

Engine control module (ECM)

(13)

Output IC

(5)

Accelerator pedal position sensor 1

3. EXECUTION CONDITION

Secondary Parameters

Execution condition

(1) Ignition switch

ON

(1) ETC control

Permission

(2) Ignition switch

ON

(2) Battery voltage

≥ 10.9 V

4. GENERAL DRIVING CYCLE

Always perform the diagnosis continuously.

5. DIAGNOSTIC METHOD

Judge as OK and clear the NG if any of the followings is established.

Judgment Value

Malfunction Criteria

Threshold Value

(1) Main CPU calculation result

The result and expected value match

(2) Communication between output ICs

Possible to communicate

(3) Step of calculation

Expected step of calculation

(4)-1 Motor relay cut-off signal from observation IC

ON

(4)-2 As defined by

Instruction error

Detect

or

Instruction error

Detect

(5) Driver IC bus signal

Did not change

(6) Written data in the CAN register

≠ Read data

Time Needed for Diagnosis:

(1): 2 time(s)

(2): 512 ms

(3): 504 ms

(4): 48 ms

(5): 2500 ms

(6): Less than 1 second

Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.

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