DTC Diagnosis Procedure

If DTC P1552 is displayed with DTC P0643, first perform the confirmation procedure (trouble diagnosis) for DTC P0643.

Is DTC P0643 detected?

YES

Perform diagnosis for P0643. Refer to DTC Description .

NO

GO TO 2.

1. Turn ignition switch OFF.
2. Disconnect battery current sensor harness connector.
3. Turn ignition switch ON.
4. Check the voltage between battery current sensor harness connector and ground.

   +		-	Voltage (Approx.)
   Battery current sensor
   Connector	Terminal
   E7	4	Ground	5 V

Is the inspection result normal?

YES

GO TO 4.

NO

GO TO 3.

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between battery current sensor harness connector and ECM harness connector.

   Battery current sensor		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   E7	4	F143	42	Existed

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

Is the inspection result normal?

YES

GO TO 4.

NO

Repair or replace error-detected parts.

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between battery current sensor harness connector and ECM harness connector.

   Battery current sensor		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   E7	2	F143	29	Existed

4. Also check harness for short to power.

Is the inspection result normal?

YES

GO TO 5.

NO

Repair or replace error-detected parts.

1. Check the continuity between ECM harness connector and ground.

   ECM		--	Continuity
   Connector	Terminal
   F143	3	Ground	Existed
   F142	87
   	88
   E152	199
   	201
   	204

2. Also check harness for short to power.

Is the inspection result normal?

YES

GO TO 6.

NO

Repair or replace error-detected parts.

1. Check the continuity between battery current sensor harness connector and ECM harness connector.

   Battery current sensor		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   E7	1	F143	56	Existed

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

Is the inspection result normal?

YES

GO TO 7.

NO

Repair or replace error-detected parts.

Refer to Component Inspection .

Is the inspection result normal?

YES

INSPECTION END

NO

Replace battery negative cable assembly.