RM38T0EC _57 Power Source / Network _145000 M20F-FXS, M20G-FXS BATTERY / CHARGING _0605077 CHARGING SYSTEM C

M20F-FXS, M20G-FXS BATTERY / CHARGING  CHARGING SYSTEM  P162B87  Lost Communication with Battery Monitor Module Missing Message  


DESCRIPTION

The hybrid vehicle control ECU communicates with the battery state sensor assembly via LIN communication. If a LIN communication error is detected, the hybrid vehicle control ECU stores this DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Note
P162B87 Lost Communication with Battery Monitor Module Missing Message Battery state sensor assembly or hybrid vehicle control ECU communication stops for approximately 17 minutes or more with the ignition switch to ON.
(1 trip detection logic)
·

Wire harness or connector

·

Battery state sensor assembly

·

Hybrid vehicle control ECU

·

Compressor with Motor Assembly


Charge warning light does not come on SAE Code: P162B

WIRING DIAGRAM

A392148E09
3.927,0.594 4.135,0.844 0.208,0.25 10 false 2 2.313,0.635 2.521,0.885 0.208,0.25 10 false 3 3.917,2.427 4.156,2.635 0.24,0.208 10 false 3 5.406,0.594 5.667,0.844 0.26,0.25 10 false 16 5.719,0.76 6.156,1.01 0.438,0.25 10 false LIN3 5.333,3.417 5.771,3.667 0.438,0.25 10 false A197 5.323,3.594 7.094,3.844 1.771,0.25 10 false Hybrid Vehicle Control ECU 2.125,3.052 2.563,3.302 0.438,0.25 10 false C145 2.135,3.24 4.365,3.448 2.229,0.208 10 false Compressor with Motor Assembly 1.198,4.438 3.073,4.677 1.875,0.24 10 false : LIN Communication Line 0.76,3.438 1.917,3.729 1.156,0.292 10 false Auxiliary Battery 0.594,1.729 1.75,2.021 1.156,0.292 10 false R/B-B RR 1.469,0.896 2.125,1.188 0.656,0.292 10 false BATT-S 2.156,1.365 4.385,1.573 2.229,0.208 10 false Battery State Sensor Assembly 2.177,1.219 2.615,1.469 0.438,0.25 10 false O223 2.563,0.74 3,0.99 0.438,0.25 10 false +B 3.552,0.76 3.99,1.01 0.438,0.25 10 false LIN 3.406,2.604 3.844,2.854 0.438,0.25 10 false DOUT

CAUTION / NOTICE / HINT

NOTICE:
·

Inspect the fuses for circuits related to this system before performing the following procedure.

·

Before replacing the hybrid vehicle control ECU, refer to Service Bulletin.



PROCEDURE

1.CHECK BATTERY STATE SENSOR ASSEMBLY INSTALLATION CONDITION
a.

Check installation condition of the battery state sensor assembly.


Result:
Proceed to
OK
NG



OK

2.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

NG

INSTALL THE BATTERY STATE SENSOR ASSEMBLY CORRECTLY

Click herePower Source / Network>M20F-FXS, M20G-FXS (BATTERY / CHARGING)>BATTERY CURRENT SENSOR>INSTALLATION


2.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)
a.

Check that the battery state sensor assembly connector is securely connected.

OK:

The connector is securely connected.



b.

Disconnect the battery state sensor assembly connector.


c.

Check the connector case and terminals for deformation or corrosion.

OK:

No deformation or corrosion.



d.
E418541C59
1.448,0.229 1.948,0.479 0.5,0.25 2.323,1.604 1.875,1.146 true 0.083,0.052 0.396,0.25 0.313,0.198 10 false *a 2.323,1.635 2.76,1.854 0.438,0.219 10 false +B 1.521,0.281 2.031,0.479 0.51,0.198 10 false O223
*a Front view of wire harness connector
(to Battery State Sensor Assembly)


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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
O223-3 (+B) - Body ground Ignition switch off 11 to 14 V



Result:
Proceed to
OK
NG



OK

3.CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - BATTERY STATE SENSOR ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (AUXILIARY BATTERY - BATTERY STATE SENSOR ASSEMBLY)

3.CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - BATTERY STATE SENSOR ASSEMBLY)
a.

Disconnect the hybrid vehicle control ECU connector.


b.

Disconnect the battery state sensor assembly connector.


c.

Disconnect the compressor with motor assembly connector.


d.

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

Standard Resistance:
Tester Connection Condition Specified Condition
A197-16 (LIN3) - O223-2 (LIN) Always Below 1 Ω
A197-16 (LIN3), O223-2 (LIN) or C145-3 (DOUT) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

4.CLEAR DTCS

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.CLEAR DTCS
a.

Check for DTCs, and note down any DTCs that are output.

Powertrain > Hybrid Control > Trouble Codes
50001 397

b.

Clear the DTCs.

Powertrain > Hybrid Control > Clear DTCs
50002 397

c.

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


Result:
Proceed to
NEXT



NEXT

5.CLEAR DTCS (AIR CONDITIONER)
5.CLEAR DTCS (AIR CONDITIONER)
a.

Check for DTCs, and note down any DTCs that are output.

Body Electrical > Air Conditioner > Trouble Codes
50001 450

b.

Clear the DTCs.

Body Electrical > Air Conditioner > Clear DTCs
50002 450

c.

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


Result:
Proceed to
NEXT



NEXT

6.CHECK FOR DTCS
6.CHECK FOR DTCS
a.

Turn the ignition switch to ON (READY) and wait for 17 minutes or more.


b.

Check for DTCs.

Powertrain > Hybrid Control > Trouble Codes
50001 397

Result:
Result Proceed to
DTC P162B87 is output. A
DTCs are not output. B



A

7.CHECK FOR DTCS (AIR CONDITIONER)

B

CHECK FOR INTERMITTENT PROBLEMS

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

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>ELECTRONIC CIRCUIT INSPECTION PROCEDURE


7.CHECK FOR DTCS (AIR CONDITIONER)
a.

Check for DTCs.

Body Electrical > Air Conditioner > Trouble Codes
50001 450

Result:
Result Proceed to
DTC B149887 is output. A
DTCs are not output. B



A

REPLACE HYBRID VEHICLE CONTROL ECU

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


B

REPLACE BATTERY STATE SENSOR ASSEMBLY

Click herePower Source / Network>M20F-FXS, M20G-FXS (BATTERY / CHARGING)>BATTERY CURRENT SENSOR>REMOVAL