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

HYBRID / BATTERY CONTROL  HYBRID CONTROL SYSTEM  P310715  Lost Communication with Airbag System Control Module Circuit Short to Auxiliary Battery or Open  


DESCRIPTION

Refer to the description for DTC P310711.

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>HYBRID CONTROL SYSTEM>P310711

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate Note
P310715 Lost Communication with Airbag System Control Module Circuit Short to Auxiliary Battery or Open Open or short to +B in the communication circuit
Communication from the airbag ECU assembly stopped and Circuit High has been detected for a certain period.
(1 trip detection logic)
·

Wire harness or connector

·

Airbag ECU assembly

·

Hybrid vehicle control ECU


Does not come on Master Warning:
Comes on 		SAE Code:
P3107

CONFIRMATION DRIVING PATTERN

HINT:

After repairs have been completed, clear the DTCs 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


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.

With ignition switch to ON and wait for 15 seconds or more.

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 or N/A, perform driving pattern again.




PROCEDURE

1.CHECK DTC OUTPUT (SRS AIRBAG)
a.

Check for DTCs.

Body Electrical > SRS Airbag > Trouble Codes
50001 444
Result:
Result Proceed to
DTCs are not output A
DTCs are output B




A

2.CHECK AIRBAG ECU ASSEMBLY (CHECK WAVEFORM)

B

GO TO DTC CHART (AIRBAG SYSTEM)

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM>DIAGNOSTIC TROUBLE CODE CHART


2.CHECK AIRBAG ECU ASSEMBLY (CHECK WAVEFORM)

Click hereEngine / Hybrid System>HYBRID / BATTERY CONTROL>HYBRID CONTROL SYSTEM>P310711

Result:
Result Proceed to
The waveform appears as shown in the illustration A
The waveform differs from the one shown in the illustration B



A

3.CLEAR DTC

B

6.CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR)
4.CHECK DTC OUTPUT (HYBRID CONTROL)
a.

Check for DTCs.

Powertrain > Hybrid Control > Trouble Codes
50001 397
Result:
Result Proceed to
P310715 is not output A
P310715 is output again B




A

5.CHECK FOR INTERMITTENT PROBLEMS

B

REPLACE HYBRID VEHICLE CONTROL ECU

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


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 CONNECTOR CONNECTION CONDITION (AIRBAG ECU ASSEMBLY CONNECTOR)

NG

CONNECT SECURELY

7.CHECK CONNECTOR CONNECTION CONDITION (AIRBAG ECU ASSEMBLY CONNECTOR)
a.
C374925C38
1.333,0.167 1.688,0.438 0.354,0.271 0.083,0.083 0.396,0.24 0.313,0.156 10 false *a 1.427,0.208 1.885,0.406 0.458,0.198 10 false I47
*a Component with harness connected
(Airbag ECU Assembly)


Check the connector connections and contact pressure of the relevant terminals for the airbag ECU assembly connector.

OK:

The connectors are connected securely and there are no contact pressure problems.



Result:
Proceed to
OK
NG



OK

8.CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - AIRBAG ECU ASSEMBLY)

NG

CONNECT SECURELY

8.CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - AIRBAG ECU ASSEMBLY)
a.

Disconnect the hybrid vehicle control ECU connector.


b.

Disconnect the airbag ECU assembly connector.


c.

Turn the ignition switch to ON.


d.

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

Standard Voltage:
Tester Connection Condition Specified Condition
I278-12 (ABFS) - Body ground Ignition switch ON Below 1 V


NOTICE:

Turning the ignition switch to ON with the airbag ECU assembly connector and the hybrid vehicle control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.



e.

Turn the ignition switch off.


f.

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

Standard Resistance (Check for Open):
Tester Connection Condition Specified Condition
I278-12 (ABFS) - I47-24 (GSW2) Ignition switch off Below 1 Ω


Standard Resistance (Check for Short):
Tester Connection Condition Specified Condition
I278-12 (ABFS) or I47-24 (GSW2) - Body ground and other terminals Ignition switch off 10 kΩ or higher


HINT:

As necessary, check that there are no wires shorted to power supply when performing the above wire harness inspection.



g.

Reconnect the airbag ECU assembly connector.


h.

Reconnect the hybrid vehicle control ECU connector.


Result:
Proceed to
OK
NG



OK

9.CHECK HYBRID VEHICLE CONTROL ECU

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

9.CHECK HYBRID VEHICLE CONTROL ECU
a.

Disconnect the airbag ECU assembly connector.


b.

Turn the ignition switch to ON.


c.

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

A535056C21
4.688,0.26 5.125,0.542 0.438,0.281 3.896,2.406 4.146,1.281 true 0.25,0.167 0.563,0.323 0.313,0.156 10 false *a 4.781,0.302 5.115,0.552 0.333,0.25 10 false I278 3.729,2.427 4.198,2.625 0.469,0.198 10 false ABFS
*a Component with harness connected
(Hybrid Vehicle Control ECU) 		- -


NOTICE:

Turning the ignition switch to ON with the airbag ECU assembly connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.


Standard Voltage:
Tester Connection Condition Specified Condition
I278-12 (ABFS) - Body ground Ignition switch ON 11 to 14 V



d.

Turn the ignition switch off.


e.

Reconnect the airbag ECU assembly connector.


Result:
Proceed to
OK
NG



OK

10.CHECK HARNESS AND CONNECTOR (AIRBAG ECU ASSEMBLY - BODY GROUND)

NG

REPLACE HYBRID VEHICLE CONTROL ECU

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


10.CHECK HARNESS AND CONNECTOR (AIRBAG ECU ASSEMBLY - BODY GROUND)
a.

Disconnect the airbag ECU assembly connector.


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
I47-33 (E1) - Body ground Ignition switch off Below 1 Ω



c.

Reconnect the airbag ECU assembly connector.


Result:
Proceed to
OK
NG



OK

REPLACE AIRBAG ECU ASSEMBLY

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>CENTER AIRBAG SENSOR ASSEMBLY>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR