RM38T0EC _51 Engine / Hybrid System _144957 HYBRID / BATTERY CONTROL _0604232 HYBRID CONTROL SYSTEM C

HYBRID / BATTERY CONTROL  HYBRID CONTROL SYSTEM  P06881F  ECM/PCM Power Relay Sense Circuit Intermittent  


DESCRIPTION

This DTC indicates that the hybrid vehicle control ECU detected an instantaneous interruption in +B power source voltage.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate Note
P06881F ECM/PCM Power Relay Sense Circuit Intermittent When the ignition switch is ON (READY), the hybrid vehicle control ECU is reset due to an instantaneous interruption of power source.
(1 trip detection logic)
·

Wire harness or connector

·

Hybrid vehicle control ECU


Comes on Master Warning:
Comes on 		SAE Code:
P2511

MONITOR DESCRIPTION

The hybrid vehicle control ECU monitors the +B power source voltage and detects momentary interruptions. If there is a momentary interruption in the +B power source voltage, the hybrid vehicle control ECU will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs P2511 (INF P06881F): ECM/PCM Power relay sense circuit intermittent
Required sensors/components Main: Power source circuit
Sub: Hybrid vehicle control ECU
Frequency of operation Continuous
Duration TMC's intellectual property
MIL operation Immediately
Sequence of operation None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored TMC's intellectual property
Other conditions belong to TMC's intellectual property -

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property -

COMPONENT OPERATING RANGE

Hybrid vehicle control ECU DTC P2511 (INF P06881F) is not detected

CONFIRMATION DRIVING PATTERN

HINT:
·

After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>HYBRID CONTROL SYSTEM>UTILITY

·

When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>HYBRID CONTROL SYSTEM>DTC CHECK / CLEAR



1.

Connect the GTS to the DLC3.

2.

Turn the ignition switch to ON and turn the GTS on.

3.

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

4.

Turn the ignition switch off and wait for 2 minutes or more.

5.

Turn the ignition switch to ON and turn the GTS on.

6.

Turn the ignition switch to ON (READY) and wait for 30 seconds or more. [*1]

(If the DTC is not output, drive the vehicle on urban roads according to the freeze frame data item "Vehicle Speed" for approximately 5 minutes.)

HINT:

[*1]: Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.


7.

Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.

8.

Check the DTC judgment result.

HINT:
·

If the judgment result shows NORMAL, the system is normal.

·

If the judgment result shows ABNORMAL, the system has a malfunction.

·

If the judgment result shows INCOMPLETE, perform the normal judgment procedure again.




WIRING DIAGRAM

A532115E02
5.969,2.385 6.906,2.823 0.938,0.438 10 false Hybrid Vehicle Control ECU 4.635,0.906 5.573,1.146 0.938,0.24 10 false PM-IGCT 2.802,1.604 4.052,1.875 1.25,0.271 10 false IGCT-MAIN NO. 1 0.177,2.25 1.833,2.531 1.656,0.281 10 false from Auxiliary Battery 6.094,1.083 6.49,1.292 0.396,0.208 10 false MREL 6.073,0.771 6.469,0.979 0.396,0.208 10 false +B1 5.969,2.208 6.365,2.417 0.396,0.208 10 false I278 5.813,1.083 6.01,1.292 0.198,0.208 10 false 10 5.896,0.646 6.094,0.854 0.198,0.208 10 false 8 3.76,1.083 3.958,1.292 0.198,0.208 10 false 1 2.875,1.083 3.073,1.292 0.198,0.208 10 false 2 2.885,0.646 3.083,0.854 0.198,0.208 10 false 5 3.76,0.646 3.958,0.854 0.198,0.208 10 false 3 1.365,0.917 2.615,1.188 1.25,0.271 10 false IGCT-MAIN NO. 1

PROCEDURE

1.CHECK AUXILIARY BATTERY TERMINAL
a.

Confirm whether the auxiliary battery terminals have been disconnected recently.

Result:
Result Proceed to
Terminals have been disconnected. A
Terminals have not been disconnected. B




A

2.CONFIRM MASTER WARNING

B

5.CHECK AUXILIARY BATTERY TERMINAL (CONTACT PROBLEM)
2.CONFIRM MASTER WARNING
a.

Turn the ignition switch to ON (READY) from off.


b.

Confirm that the master warning illuminates.

Result:
Result Proceed to
Master warning illuminates. A
Master warning does not illuminate. B


NOTICE:

DTC P06881F may be stored after disconnecting and reconnecting the auxiliary battery terminals. If this happens, the DTC will not be output if the ignition switch is turned off and then ON (READY) again. In this case, clear the DTCs to complete the inspection.



c.

Turn the ignition switch off.



A

3.CLEAR DTC

B

END

3.CLEAR DTC
a.

Read and record the DTCs and Freeze Frame Data.

Powertrain > Hybrid Control > Trouble Codes
50001 397

b.

Clear the DTCs and Freeze Frame Data.

Powertrain > Hybrid Control > Clear DTCs
50002 397

c.

Turn the ignition switch off and wait for 2 minutes or more.


Result:
Proceed to
NEXT



NEXT

4.CHECK DTC OUTPUT (HYBRID CONTROL)
4.CHECK DTC OUTPUT (HYBRID CONTROL)
a.

Check for DTCs.

Powertrain > Hybrid Control > Trouble Codes
50001 397
Result:
Result Proceed to
DTC P06881F is output again. A
DTCs other than P06881F are also output. B



b.

Turn the ignition switch off.



A

5.CHECK AUXILIARY BATTERY TERMINAL (CONTACT PROBLEM)

B

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

5.CHECK AUXILIARY BATTERY TERMINAL (CONTACT PROBLEM)
a.

Check the connection of the auxiliary battery terminal.

OK:

The terminal is connected securely and there is no contact problem.



Result:
Proceed to
OK
NG



OK

6.CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR)

NG

CONNECT SECURELY

6.CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR)

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>HYBRID CONTROL SYSTEM>P056014

Result:
Proceed to
OK
NG



OK

7.CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - IGCT-MAIN NO. 1 RELAY)

NG

CONNECT SECURELY

7.CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - IGCT-MAIN NO. 1 RELAY)
a.

Remove the IGCT-MAIN NO. 1 relay from the No. 1 engine room relay block and No. 1 junction block assembly.


b.

Disconnect the hybrid vehicle control ECU connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
I278-8 (+B1) - 3 (IGCT-MAIN NO. 1 relay holder) Ignition switch off Below 1 Ω



d.

Reconnect the hybrid vehicle control ECU connector.


e.

Reinstall the IGCT-MAIN NO. 1 relay.


Result:
Proceed to
OK
NG



OK

8.CHECK FOR INTERMITTENT PROBLEMS

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.CHECK FOR INTERMITTENT PROBLEMS
a.

Check for intermittent problems.

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>HOW TO PROCEED WITH TROUBLESHOOTING

i.

Check the connection and terminal contact pressure of the connectors and wire harnesses between the hybrid vehicle control ECU and the No. 1 engine room relay block and No. 1 junction block assembly.


ii.

When the ignition switch is ON (READY), jiggle the connectors and wire harnesses between the hybrid vehicle control ECU and the No. 1 engine room relay block and No. 1 junction block assembly.



Result:
Result Proceed to
Problem symptom does not recur. A
Problem symptom recurs. B



A

REPLACE HYBRID VEHICLE CONTROL ECU

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>HYBRID VEHICLE CONTROL ECU>REMOVAL


B

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA