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

HYBRID / BATTERY CONTROL  HYBRID CONTROL SYSTEM  P253314  Ignition Switch On/Start Position Circuit Low Circuit Short to Ground or Open  


DTC SUMMARY

The hybrid vehicle control ECU stores a DTC when there is no auxiliary battery voltage to the IGR terminal even though there is auxiliary battery voltage to the IGP terminal.

DESCRIPTION

When the ignition switch is turned to ON, the auxiliary battery power source is supplied to the IGP and IGR terminals of the hybrid vehicle control ECU. When the ignition switch is off, the auxiliary battery power source is cut off.

When the ignition switch is turned off during driving, the auxiliary battery power source supplied to the IGP terminal is cut off. However, the auxiliary battery power source supplied to the IGR terminal is supplied until the vehicle is stopped and the ignition switch is turned off.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate Note
P253314 Ignition Switch On/Start Position Circuit Low Circuit Short to Ground or Open Short to ground or open in IGR terminal circuit.
(2 trip detection logic)
·

Power distribution box assembly

·

Wire harness or connector

·

Hybrid vehicle control ECU


Does not come on Master Warning: Does not come on SAE Code:
P2534

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.

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

2.

Turn the ignition switch off and wait for at least 30 seconds.

3.

Turn the ignition switch to ON (READY) and wait for 1 minute or more.

4.

Enter the following menus: Powertrain / Engine / Utility / All Readiness.

5.

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

A532118E02
0.521,6.75 2.115,7.125 1.594,0.375 10 false Auxiliary Battery 0.365,6.031 1.24,6.24 0.875,0.208 10 false BATT MAIN 6.292,6.375 6.656,6.604 0.365,0.229 10 false E1 2.365,3.021 2.99,3.333 0.625,0.313 10 false AM2 0.354,3.688 1.385,4.042 1.031,0.354 10 false INP STD NO. 3 5.656,0.427 5.979,0.698 0.323,0.271 10 false +B 5.667,1.177 6.219,1.396 0.552,0.219 10 false IGRD 3.979,4.323 4.667,4.646 0.688,0.323 10 false IGR NO. 1 4.698,3.688 5.375,4.094 0.677,0.406 10 false ECU-IGR NO. 1 6.302,3.552 6.708,3.781 0.406,0.229 10 false IGR 5.917,6.354 6.313,6.615 0.396,0.26 10 false I278 5.344,6.979 7.125,7.208 1.781,0.229 10 false Hybrid Vehicle Control ECU 5.427,3.531 6.052,3.844 0.625,0.313 10 false 8E 3.375,2.479 4,2.792 0.625,0.313 10 false 8B 2.188,2.479 2.813,2.792 0.625,0.313 10 false 8B 1.448,3.521 1.771,3.76 0.323,0.24 10 false 8K 1.479,3.333 1.729,3.542 0.25,0.208 10 false 1 2.49,2.49 3.115,2.802 0.625,0.313 10 false 24 3.667,2.49 4.292,2.802 0.625,0.313 10 false 10 5.438,3.333 5.802,3.573 0.365,0.24 10 false 22 4.823,1.563 6.948,2.01 2.125,0.448 10 false Certification ECU (Smart Key ECU Assembly) 5.292,1.167 5.74,1.396 0.448,0.229 10 false I223 5.292,0.406 5.688,0.615 0.396,0.208 10 false I222 5.375,0.219 5.656,0.406 0.281,0.188 10 false 6 5.323,0.979 5.604,1.219 0.281,0.24 10 false 11 6,3.313 6.354,3.542 0.354,0.229 10 false 8 5.885,3.521 6.313,3.771 0.427,0.25 10 false A197 5.99,6.146 6.302,6.385 0.313,0.24 10 false 1 2.344,5.271 5.146,5.604 2.802,0.333 10 false Power Distribution Box Assembly 5.448,4.042 5.719,4.281 0.271,0.24 10 false 36 5.438,4.469 5.792,4.719 0.354,0.25 10 false 41 5.427,4.219 5.792,4.406 0.365,0.188 10 false 8B 5.427,4.635 6.052,4.948 0.625,0.313 10 false 8C

CAUTION / NOTICE / HINT

NOTICE:

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


PROCEDURE

1.READ VALUE USING GTS (IGR)
a.

Read the Data List.

Powertrain > Hybrid Control > Data List
Tester Display
IGR
50003 397 656
Standard:
GTS Display Switch Condition Specified Condition
IGR Ignition switch ON ON


Result:
Proceed to
OK
NG




OK

CHECK FOR INTERMITTENT PROBLEMS

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


NG

2.CHECK TERMINAL VOLTAGE (IGR VOLTAGE)
2.CHECK TERMINAL VOLTAGE (IGR VOLTAGE)
a.

Turn the ignition switch to ON.


b.

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

A502139C77
4.688,0.26 5.125,0.542 0.438,0.281 2.479,0.26 2.917,0.542 0.438,0.281 1.938,2.385 2.573,1.271 true 5.865,2.365 5.781,1.302 true 0.25,0.167 0.563,0.323 0.313,0.156 10 false *a 5.844,2.406 6.156,2.604 0.313,0.198 10 false E1 1.802,2.406 2.25,2.677 0.448,0.271 10 false IGR 2.542,0.302 3.021,0.563 0.479,0.26 10 false A197 4.781,0.302 5.115,0.552 0.333,0.25 10 false I278
*a Component with harness connected
(Hybrid Vehicle Control ECU) 		- -


Standard Voltage:
Tester Connection Switch Condition Specified Condition
A197-8 (IGR) - I278-1 (E1) Ignition switch ON 11 to 14 V



c.

Turn the ignition switch off.


Result:
Proceed to
OK
NG



OK

REPLACE HYBRID VEHICLE CONTROL ECU

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


NG

3.CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - HYBRID VEHICLE CONTROL ECU)
3.CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - HYBRID VEHICLE CONTROL ECU)
a.

Disconnect the hybrid vehicle control ECU connector.


b.

Disconnect the power distribution box assembly connector.


c.

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

Standard Resistance (Check for Open):
Tester Connection Condition Specified Condition
8E-22 - A197-8 (IGR) Always Below 1 Ω


Standard Resistance (Check for Short):
Tester Connection Condition Specified Condition
8E-22 or A197-8 (IGR) - Other terminals and body ground Always 10 kΩ or higher



d.

Reconnect the power distribution box assembly connector.


e.

Reconnect the hybrid vehicle control ECU connector.


Result:
Proceed to
OK
NG



OK

4.CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - BODY GROUND)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - BODY GROUND)
a.

Disconnect the power distribution box assembly connectors.


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
8B-36 - Body ground Always Below 1 Ω
8C-41 - Body ground Always Below 1 Ω



c.

Reconnect the power distribution box assembly connectors.


Result:
Proceed to
OK
NG



OK

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR