DTC    P3187-751    Short to GND in Rear Guard Sensor 1 Connection

DTC    P3188-752    Open or Short to B+ in Rear Guard Sensor 1 Connection

for Preparation Click here


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
  1. Wire harness or connector
  2. Rear circuit breaker sensor RH
  3. HV control ECU
P3188
752
Open or +B short in circuit breaker sensor (RH) circuit
  1. Wire harness or connector
  2. Rear circuit breaker sensor RH
  3. HV control ECU

WIRING DIAGRAM


A113961E02


INSPECTION PROCEDURE

1.CHECK HYBRID VEHICLE CONTROL ECU (VOLTAGE CHECK)

  1. Turn the ignition switch to the ON position.

  1. 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.

  1. Turn the ignition switch to the ON position.

  1. 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.

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

  1. 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.



    A112781E05

  1. 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