P3187-751

DESCRIPTION

The HV control ECU monitors the connection status of the circuit breaker sensor RR RH signal (collision signal) line. If the ECU detects a malfunction, it will alert the driver.

DTC No.	INF Code	DTC Detection Condition	Trouble Area
P3187	751	GND short in rear circuit breaker sensor (RH) circuit	Wire harness or connector Rear circuit breaker sensor RH HV control ECU
P3188	752	Open or +B short in circuit breaker sensor (RH) circuit	Wire harness or connector Rear circuit breaker sensor RH HV control ECU

WIRING DIAGRAM

INSPECTION PROCEDURE

1. CHECK HYBRID VEHICLE CONTROL ECU (VOLTAGE CHECK)

1. Turn the ignition switch to the ON position.

2. Measure the voltage according to the value(s) in the table below.

   Standard voltage:

   Tester Connection	Specified Condition
   BS1 (H30-26) - BS1G (H30-34)	2.3 to 3.1 V

NG	Go to step 4

OK

2. CLEAR DTC (HV)

1. Connect the intelligent tester to the DLC3.

2. Turn the ignition switch to the ON position.

3. Select the following menu items: Powertrain / Hybrid Control / DTC / Clear.

NEXT

3. RECONFIRM OUTPUT DTCS (HV)

1. Turn the ignition switch to the ON position.

2. Select the following menu items: Powertrain / Hybrid Control / DTC.

3. Read output DTCs. (Click here)

   Result:

   P3187-751 and P3188-752 are output.
   

NO	CHECK FOR INTERMITTENT PROBLEMS

YES
REPLACE HYBRID VEHICLE CONTROL ECU

4. INSPECT REAR CIRCUIT BREAKER SENSOR RH

1. Disconnect the C22 rear circuit breaker sensor RH connector.

2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance:

   Tester Connection	Specified Condition
   1(SCR-) to 2(SCR+)	0.65 to 1.0kΩ at 20°C (68°F)

NG	REPLACE REAR CIRCUIT BREAKER SENSOR RH

OK
REPAIR OR REPLACE HARNESS OR CONNECTOR