DTC Diagnosis Procedure

If DTC P26A6 is displayed with another DTC P0643, first perform the trouble diagnosis for DTC P0643.

Is applicable DTC detected?

YES>>

Perform diagnosis of applicable. Refer to DTC Description .

NO>>

GO TO 2.

1. Turn ignition switch OFF.
2. Disconnect multi-way control valve harness connector.
3. Turn ignition switch ON.
4. Check the voltage between multi-way control valve harness connector and ground.

   +		-	Voltage (Approx.)
   Multi-way control valve
   Connector	Terminal
   F117	5	Ground	5 V

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Perform the trouble diagnosis for power supply circuit.

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between multi-way control valve harness connector and ECM harness connector.

   +		-		Continuity
   Multi-way control valve		ECM
   Connector	Terminal	Connector	Terminal
   F117	3	F142	125	Existed

4. Also check harness for short to power.

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair or replace error-detected parts.

1. Check the continuity between multi-way control valve harness connector and ECM harness connector.

   +		-		Continuity
   Multi-way control valve		ECM
   Connector	Terminal	Connector	Terminal
   F117	4	F142	110	Existed

2. Also check harness for short to ground and to power.

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Repair or replace error-detected parts.

Check the multi-way control valve position sensor. Refer to Component Inspection . Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace multi-way control valve. Refer to MULTI-WAY CONTROL VALVE : Exploded View .