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DTC P2B5E:00 [PCM (SKYACTIV-D)]

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Outline

System malfunction location	Coolant control valve position sensor circuit low input
Detection condition	•  The PCM monitors the coolant control valve position sensor signal. When the following conditions are met, if the PCM detects that the coolant control valve position sensor voltage at the PCM terminal 1BP is below 0.66 V for 5 s, the PCM determines that the coolant control valve position sensor circuit is low. Preconditions ―  0.5 s have elapsed after the ignition was switched ON (under the engine on or off) ―  The following DTCs are not detected •  Constant voltage power supply control system: P0652:00, P0653:00
Fail-safe	•  Inhibits the DENOx/DESOx control. •  Inhibits the EGR control. •  PCM restricts engine torque.
Possible cause	•  Coolant control valve position sensor connector or terminals malfunction •  Short to ground in any of the following coolant control valve position sensor circuits. ―  Power supply circuit ―  SENT communication line •  PCM connector or terminals malfunction •  Short circuit in coolant control valve position sensor ground circuit and SENT communication line •  coolant control valve position sensor malfunction •  Open circuit in any of the following coolant control valve position sensor circuits. ―  Power supply circuit ―  SENT communication line •  PCM malfunction

Diagnostic Procedure

Step	Inspection	Results	Action
1	RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION •  Record the snapshot data. Note •  Recording can be facilitated using the screen capture function of the PC.	—	Go to the next step.
2	VERIFY RELATED REPAIR INFORMATION OR SERVICE INFORMATION AVAILABILITY •  Verify related Service Bulletins, on-line repair information, or Service Information availability. •  Is any related Information available?	Yes	Perform repair or diagnosis according to the available information. •  If the vehicle is not repaired, go to the next step.
		No	Go to the next step.
3	INSPECT COOLANT CONTROL VALVE POSITION SENSOR CONNECTOR FOR MALFUNCTION •  Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.) •  Are the connector and terminal normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification.
4	INSPECT COOLANT CONTROL VALVE POSITION SENSOR POWER SUPPLY CIRCUIT AND SENT COMMUNICATION LINE FOR SHORT TO GROUND •  Inspect the applicable circuit for a short to ground. (See CIRCUIT INSPECTION.) •  Is the circuit normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification.
5	INSPECT PCM CONNECTOR FOR MALFUNCTION •  Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.) •  Are the connector and terminal normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification.
6	INSPECT COOLANT CONTROL VALVE POSITION SENSOR GROUND CIRCUIT AND SENT COMMUNICATION LINE FOR SHORT CIRCUIT •  Inspect the applicable circuits for a short circuit. (See CIRCUIT INSPECTION.) •  Is the circuit normal?	Yes	Go to repair completion verification.
		No	Repair or replace the malfunctioning location and perform the repair completion verification.
7	INSPECT COOLANT CONTROL VALVE POSITION SENSOR POWER SUPPLY CIRCUIT AND SENT COMMUNICATION LINE FOR OPEN CIRCUIT •  Inspect the applicable circuit for open circuit. (See CIRCUIT INSPECTION.) •  Is the circuit normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification.
8	INSPECT COOLANT CONTROL VALVE POSITION SENSOR FOR MALFUNCTION •  Inspect the applicable part. (See COOLANT CONTROL VALVE INSPECTION [SKYACTIV-D 1.8].) •  Is the part normal?	Yes	Go to repair completion verification.
		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See COOLANT CONTROL VALVE REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)
Repair completion verification 1	VERIFY THAT VEHICLE IS REPAIRED •  Install/connect the part removed/disconnected during the troubleshooting procedure. •  Clear the DTC recorded in the memory. (See CLEARING DTC.) •  Replicate the vehicle conditions at the time the DTC was detected using the following procedure. ―  Perform the KOEO or KOER self test. (See DTC INSPECTION.) •  Perform the DTC inspection for the PCM. (See DTC INSPECTION.) •  Is the same Pending DTC present?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].) If the CAN communication is normal, perform the diagnosis from Step 1. •  If the malfunction recurs, replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)
		No	Go to the next step.
Repair completion verification 2	VERIFY IF OTHER DTCs DISPLAYED •  Perform the DTC inspection. (See DTC INSPECTION.) •  Are any other DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
		No	DTC troubleshooting completed.