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

HYBRID / BATTERY CONTROL  HYBRID CONTROL SYSTEM  P253012  IG2 Signal Circuit Short to Auxiliary Battery  


DESCRIPTION

The hybrid vehicle control ECU compares the IGP signal to the IG control status signal sent from the certification ECU (smart key ECU assembly) to detect a stuck on malfunction of the IGP signal.

HINT:

If DTC P253012 is stored, the ignition switch will turn off (READY off).


DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate Note
P253012 IG2 Signal Circuit Short to Auxiliary Battery The IGP signal of the hybrid vehicle control ECU and the IG switch signal sent from the certification ECU (smart key ECU assembly) do not match.
(1 trip detection logic)
·

Auxiliary battery

·

Certification ECU (smart key ECU assembly)

·

Hybrid vehicle control ECU

·

ECM

·

IGP-MAIN relay

·

Wire harness or connector


Does not come on Master Warning:
Comes on 		SAE Code:
P2532

CONFIRMATION DRIVING PATTERN

HINT:

After repair has 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 wait for 15 seconds or more.

6.

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

7.

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

8.

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

9.

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 driving pattern again.




WIRING DIAGRAM

C408111E25
1.323,0.719 2.479,0.917 1.156,0.198 10 false IGP-MAIN 2.49,1.302 3.406,1.5 0.917,0.198 10 false IGP-MAIN 3.302,0.698 4.76,0.99 1.458,0.292 10 false ECU-IGP NO. 1 5.281,4.146 7.125,4.5 1.844,0.354 10 false Certification ECU (Smart Key ECU Assembly) 5.292,3.99 5.698,4.219 0.406,0.229 10 false I223 5.781,2.896 6.083,3.125 0.302,0.229 10 false A47 5.781,3.073 7.021,3.563 1.24,0.49 10 false ECM 5.865,2.521 6.781,2.719 0.917,0.198 10 false E1 5.865,2.135 6.781,2.333 0.917,0.198 10 false IGP 5.854,3.688 6.771,3.885 0.917,0.198 10 false IGPD 5.615,2.417 5.917,2.646 0.302,0.229 10 false 10 5.667,2.031 5.969,2.26 0.302,0.229 10 false 2 5.583,3.573 5.885,3.802 0.302,0.229 10 false 24 5.292,1.531 7.115,1.927 1.823,0.396 10 false Hybrid Vehicle Control ECU 5.875,0.917 6.229,1.104 0.354,0.188 10 false E1 5.865,0.438 6.198,0.635 0.333,0.198 10 false IGP 5.292,1.365 5.594,1.594 0.302,0.229 10 false I278 5.615,0.865 5.917,1.094 0.302,0.229 10 false 1 5.594,0.427 5.896,0.656 0.302,0.229 10 false 26 3.49,0.417 3.792,0.646 0.302,0.229 10 false 1 1.771,0.438 2.073,0.667 0.302,0.229 10 false 2 3.906,0.417 4.208,0.646 0.302,0.229 10 false 2 1.365,0.438 1.667,0.667 0.302,0.229 10 false 1 2.354,0.448 2.656,0.677 0.302,0.229 10 false 5 2.354,0.865 2.656,1.094 0.302,0.229 10 false 2 3.115,0.438 3.417,0.667 0.302,0.229 10 false 3 3.125,0.865 3.427,1.094 0.302,0.229 10 false 1 0.042,0.5 0.906,0.896 0.865,0.396 10 false from Auxiliary Battery 2.115,1.688 4.375,2.104 2.26,0.417 10 false No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly

CAUTION / NOTICE / HINT

NOTICE:

Before replacing the certification ECU (smart key ECU assembly), refer to Service Bulletin.


PROCEDURE

1.CHECK AUXILIARY BATTERY VOLTAGE
a.

Turn the ignition switch off and turn on the high beam headlights for 30 seconds. This will remove the surface charge from the auxiliary battery.


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
Positive (+) auxiliary battery terminal - Negative (-) auxiliary battery terminal 20°C (68°F), Ignition switch off 11.0 V or higher


Result:
Proceed to
OK
NG




OK

3.CLEAR DTC

NG

2.CHARGE OR REPLACE AUXILIARY BATTERY
2.CHARGE OR REPLACE AUXILIARY BATTERY
a.

Charge or replace the auxiliary battery.


Result:
Proceed to
NEXT



NEXT

3.CLEAR DTC
3.CLEAR DTC
a.

Clear the DTCs.

Powertrain > Hybrid Control > Clear DTCs
50002 397

b.

Turn the ignition switch off.


Result:
Proceed to
NEXT



NEXT

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

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


b.

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


c.

Check for DTCs.

Powertrain > Hybrid Control > Trouble Codes
50001 397
Result:
Result Proceed to
P253012 is output. A
P253012 is not output. B



d.

Turn the ignition switch off.



A

5.CHECK DTC OUTPUT (HYBRID CONTROL)

B

CHECK FOR INTERMITTENT PROBLEMS

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


5.CHECK DTC OUTPUT (HYBRID CONTROL)
a.

Check for DTCs.

Powertrain > Hybrid Control > Trouble Codes
50001 397
Result:
Result Proceed to
U012987, U014087, U015187, U016487, U110787 or U117087 is output A
Other than above B



b.

Turn the ignition switch off.



A

6.INSPECT RELAY (IGP-MAIN)

B

GO TO DTC CHART (HYBRID BATTERY SYSTEM)

6.INSPECT RELAY (IGP-MAIN)
a.

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


b.
A167865C26
2.615,0.552 2.708,0.198 2.708,0.198 2.792,0.198 true 2.031,0.563 1.938,0.198 1.938,0.198 1.854,0.198 true 2.531,1.125 2.948,1.125 true 2.531,1.625 2.948,1.625 true 0.094,0.083 0.406,0.24 0.313,0.156 10 false *1 1.198,0.781 1.51,0.938 0.313,0.156 10 false 5 1.188,1.323 1.5,1.479 0.313,0.156 10 false 2 0.219,1.323 0.531,1.479 0.313,0.156 10 false 1 0.24,0.781 0.552,0.938 0.313,0.156 10 false 3 1.75,0.135 2.063,0.292 0.313,0.156 10 false 1 2.844,0.125 3.156,0.281 0.313,0.156 10 false 2 3,1.063 3.313,1.219 0.313,0.156 10 false 5 3,1.563 3.313,1.719 0.313,0.156 10 false 3
*1 IGP-MAIN Relay


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

Standard Resistance:
Tester Connection Condition Specified Condition
3 - 5 Auxiliary battery voltage not applied between terminals 1 and 2 10 kΩ or higher
Auxiliary battery voltage applied between terminals 1 and 2 Below 1 Ω



c.

Install the IGP-MAIN relay.


Result:
Proceed to
OK
NG



OK

7.CHECK DTC OUTPUT (MAIN BODY)

NG

REPLACE RELAY (IGP-MAIN)

7.CHECK DTC OUTPUT (MAIN BODY)
a.

Check for DTCs.

Body Electrical > Main Body > Trouble Codes
50001 449
Result:
Result Proceed to
DTCs related to CXPI communication system are output. A
Other than above B



b.

Turn the ignition switch off.



A

8.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - IGP-MAIN RELAY)

B

GO TO DTC CHART (CXPI COMMUNICATION SYSTEM)

Click herePower Source / Network>NETWORKING>CXPI COMMUNICATION SYSTEM>DIAGNOSTIC TROUBLE CODE CHART


8.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - IGP-MAIN RELAY)
a.

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


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
1 (IGP-MAIN relay holder) - Body ground Ignition switch off 1 V or less



c.

Install the IGP-MAIN relay.


Result:
Proceed to
OK
NG



OK

9.CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - IGP-MAIN RELAY)

NG

10.CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - IGP-MAIN RELAY)
9.CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - IGP-MAIN RELAY)
a.

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


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
3 (IGP-MAIN relay holder) - Body ground Ignition switch off 1 V or less



c.

Install the IGP-MAIN relay.


Result:
Proceed to
OK
NG



OK

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 IGP-MAIN relay.


ii.

When the ignition switch is ON (READY), jiggle the connectors and wire harnesses between the hybrid vehicle control ECU and the IGP-MAIN relay.




NG

11.CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - IGP-MAIN RELAY)
10.CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - IGP-MAIN RELAY)
a.

Disconnect the certification ECU (smart key ECU assembly) connector.


b.

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


c.

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

Standard Voltage:
Tester Connection Condition Specified Condition
1 (IGP-MAIN relay holder) - Body ground Ignition switch off 1 V or less



d.

Install the IGP-MAIN relay.


e.

Reconnect the certification ECU (smart key ECU assembly) connector.


Result:
Proceed to
OK
NG



OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

11.CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - IGP-MAIN RELAY)
a.

Disconnect the hybrid vehicle control ECU connector.


b.

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


c.

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

Standard Voltage:
Tester Connection Condition Specified Condition
3 (IGP-MAIN relay holder) - Body ground Ignition switch off 1 V or less



d.

Install the IGP-MAIN relay.


e.

Reconnect the hybrid vehicle control ECU connector.


Result:
Proceed to
OK
NG



OK

REPLACE HYBRID VEHICLE CONTROL ECU

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


NG

12.CHECK HARNESS AND CONNECTOR (ECM - IGP-MAIN RELAY)
12.CHECK HARNESS AND CONNECTOR (ECM - IGP-MAIN RELAY)
a.

Disconnect the ECM connector.


b.

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


c.

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

Standard Voltage:
Tester Connection Condition Specified Condition
3 (IGP-MAIN relay holder) - Body ground Ignition switch off 1 V or less



d.

Install the IGP-MAIN relay.


e.

Reconnect the ECM connector.


Result:
Proceed to
OK
NG



OK

REPLACE ECM

Click hereEngine / Hybrid System>M20F-FXS, M20G-FXS (ENGINE CONTROL)>ECM>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR