RM36D0EC _57 Power Source / Network _083089 M20D-FKS BATTERY / CHARGING _0402337 CHARGING SYSTEM C

M20D-FKS BATTERY / CHARGING  CHARGING SYSTEM  P162B87  Lost Communication with Battery Monitor Module Missing Message  


DESCRIPTION

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

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

Wire harness or connector

·

Battery state sensor assembly

·

ECM


Charge warning light does not come on DTC stored SAE: P162B

WIRING DIAGRAM

A427236E37
0.615,0.688 1.427,0.906 0.813,0.219 10 false from Battery 1.698,0.854 2.51,1.073 0.813,0.219 10 false BATT-S 2.5,0.625 2.635,0.833 0.135,0.208 10 false 3 2.677,0.708 2.927,0.938 0.25,0.229 10 false +B 3.76,0.719 4.01,0.948 0.25,0.229 10 false LIN 4.042,0.573 4.292,0.802 0.25,0.229 10 false 2 2.417,1.167 2.802,1.427 0.385,0.26 10 false A128 2.427,1.323 4.542,1.552 2.115,0.229 10 false Battery State Sensor Assembly 2.667,2.667 3.052,2.927 0.385,0.26 10 false C46 2.646,2.823 4.76,3.052 2.115,0.229 10 false Generator Assembly 1.083,3.177 3.198,3.406 2.115,0.229 10 false : LIN Communication Line 5.844,0.719 6.135,0.958 0.292,0.24 10 false LIN 5.583,0.542 5.833,0.771 0.25,0.229 10 false 90 6.063,1.813 6.354,2.052 0.292,0.24 10 false C71 6.073,1.979 6.583,2.208 0.51,0.229 10 false ECM 3.75,2.167 4.26,2.396 0.51,0.229 10 false LIN 4.031,2.052 4.281,2.281 0.25,0.229 10 false 2

CAUTION / NOTICE / HINT

NOTICE:
·

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

·

Before replacing the ECM, 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 CHARGING SYSTEM

NG

INSTALL THE BATTERY STATE SENSOR ASSEMBLY CORRECTLY

Click herePower Source / Network>M20D-FKS (BATTERY / CHARGING)>BATTERY CURRENT SENSOR>INSTALLATION


2.CHECK CHARGING SYSTEM
a.

Check the charging system.

Click herePower Source / Network>M20D-FKS (BATTERY / CHARGING)>CHARGING SYSTEM>ON-VEHICLE INSPECTION


Result:
Proceed to
OK
NG



OK

3.CHECK HARNESS AND CONNECTOR (ECM - BATTERY STATE SENSOR ASSEMBLY)

NG

REPAIR OR REPLACE CHARGING SYSTEM

3.CHECK HARNESS AND CONNECTOR (ECM - BATTERY STATE SENSOR ASSEMBLY)
a.

Disconnect the ECM connector.


b.

Disconnect the battery state sensor assembly connector.


c.

Disconnect the generator assembly connector.


d.

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

Standard Resistance (Check for Open):
Tester Connection Condition Specified Condition
A128-2 (LIN) - C71-90 (LIN) Always Below 1 Ω


Standard Resistance (Check for Short):
Tester Connection Condition Specified Condition
A128-2 (LIN), C46-2 (LIN) or C71-90 (LIN) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

4.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.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.
A566365C01
1.51,0.125 2,0.417 0.49,0.292 2.448,1.854 1.948,1.208 false 0.188,0.125 0.5,0.323 0.313,0.198 10 false *a 2.385,1.865 2.698,2.063 0.313,0.198 10 false +B 1.594,0.167 2.208,0.365 0.615,0.198 10 false A128
*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 Condition Specified Condition
A128-3 (+B) - Body ground Always 11 to 14 V



Result:
Proceed to
OK
NG



OK

5.CLEAR DTC

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.CLEAR DTC
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Enter the following menus: Powertrain / Engine / Trouble Codes.


e.

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

Powertrain > Engine > Trouble Codes
50001 372

f.

Enter the following menus: Powertrain / Engine / Trouble Codes.


g.

Clear the DTCs.

Powertrain > Engine > Clear DTCs
50002 372

h.

Turn the ignition switch off, wait 30 seconds.


Result:
Proceed to
NEXT



NEXT

6.CHECK DTC OUTPUT
6.CHECK DTC OUTPUT
a.

Connect the GTS to the DLC3.


b.

Start the engine.


c.

Allow the engine to idle for approximately 17 minutes or more.


d.

Turn the GTS on.


e.

Enter the following menus: Powertrain / Engine / Trouble Codes.


f.

Check for DTCs.

Powertrain > Engine > Trouble Codes
50001 372

Result:
Result Proceed to
Only DTC P162B87 is output A
DTC P161A87 and P162B87 are output. B
DTCs are not output. C



A

REPLACE BATTERY STATE SENSOR ASSEMBLY

Click herePower Source / Network>M20D-FKS (BATTERY / CHARGING)>BATTERY CURRENT SENSOR>REMOVAL


B

REPLACE ECM

Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>ECM>REMOVAL


C

CHECK FOR INTERMITTENT PROBLEMS

Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>SFI SYSTEM>CHECK FOR INTERMITTENT PROBLEMS