RM38N0EC _57 Power Source / Network _111789 M20C-FKS, M20D-FKS BATTERY / CHARGING _0506213 CHARGING SYSTEM C

M20C-FKS, M20D-FKS BATTERY / CHARGING  CHARGING SYSTEM  P161A87  Lost Communication with Alternator Missing Message  


DESCRIPTION

The ECM communicates with the generator 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 Note
P161A87 Lost Communication with Alternator Missing Message Generator assembly or ECM communication stops for approximately 17 minutes or more with the ignition switch ON
(1 trip detection logic)
·

Wire harness or connector

·

Generator assembly

·

ECM


Charge warning light does not come on SAE Code: P161A

WIRING DIAGRAM

A504135E02
5.865,3.031 6.313,3.219 0.448,0.188 10 false ECM 5.865,2.844 6.323,3.042 0.458,0.198 10 false C115 5.5,0.677 5.958,0.875 0.458,0.198 10 false LIN 5.219,0.5 5.677,0.698 0.458,0.198 10 false 90 3.396,0.667 3.854,0.865 0.458,0.198 10 false LIN 3.708,0.51 4.167,0.708 0.458,0.198 10 false 2 2.313,0.854 2.771,1.052 0.458,0.198 10 false +B 2.146,0.75 2.604,0.948 0.458,0.198 10 false 3 1.094,1.01 2.25,1.521 1.156,0.51 10 false BATT-S NO. 1 0.896,2.302 1.802,2.615 0.906,0.313 10 false Battery 2.219,1.302 4.573,1.563 2.354,0.26 10 false Battery State Sensor Assembly 2.208,1.135 2.667,1.333 0.458,0.198 10 false A101 2.271,2.802 4.563,3.104 2.292,0.302 10 false Generator Assembly 2.281,2.625 2.74,2.823 0.458,0.198 10 false C83 3.406,2.146 3.865,2.344 0.458,0.198 10 false LIN 3.719,1.979 4.177,2.177 0.458,0.198 10 false 2 0.771,3.281 2.479,3.552 1.708,0.271 10 false : LIN Communication Line 0.729,1.365 1.635,1.677 0.906,0.313 10 false FL MAIN 1.083,0.573 2.24,1.083 1.156,0.51 10 false BATT-S NO. 2 2.333,0.417 2.792,0.615 0.458,0.198 10 false RBAT 2.146,0.323 2.604,0.521 0.458,0.198 10 false 1

CAUTION / NOTICE / HINT

NOTICE:
·

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

·

Before replacing the ECM, refer to Service Bulletin.



PROCEDURE

1.CHECK CHARGING SYSTEM

Click herePower Source / Network>M20C-FKS, M20D-FKS (BATTERY / CHARGING)>CHARGING SYSTEM>ON-VEHICLE INSPECTION

Result:
Proceed to
OK
NG



OK

2.CHECK HARNESS AND CONNECTOR (ECM - GENERATOR ASSEMBLY)

NG

REPAIR OR REPLACE CHARGING SYSTEM

2.CHECK HARNESS AND CONNECTOR (ECM - GENERATOR ASSEMBLY)
a.

Disconnect the ECM connector.


b.

Disconnect the generator assembly connector.


c.

Disconnect the battery state sensor 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

Click Location & Routing(A101,C83,C115)Location & Routing

Click Connector(A101)Engine Compartment>Engine Room Main Wire / Transmission Wire>Battery State Sensor Assembly

Click Connector(C83)Engine Compartment>Engine Wire>Generator Assembly

Click Connector(C115)Engine Compartment>Engine Wire>ECM

A101-2 (LIN) or C83-2 (LIN) - C115-90 (LIN) Always Below 1 Ω


Standard Resistance (Check for Short):
Tester Connection Condition Specified Condition

Click Location & Routing(A101,C83,C115)Location & Routing

Click Connector(A101)Engine Compartment>Engine Room Main Wire / Transmission Wire>Battery State Sensor Assembly

Click Connector(C83)Engine Compartment>Engine Wire>Generator Assembly

Click Connector(C115)Engine Compartment>Engine Wire>ECM

A101-2 (LIN), C83-2 (LIN) or C115-90 (LIN) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

3.CLEAR DTC

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.CLEAR DTC
a.

Check for DTCs, and then write them down.

Powertrain > Engine > Trouble Codes
50001 372

b.

Clear the DTCs.

Powertrain > Engine > Clear DTCs
50002 372

c.

Turn the ignition switch off and wait 30 seconds.


Result:
Proceed to
NEXT



NEXT

4.CHECK DTC OUTPUT
4.CHECK DTC OUTPUT
a.

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


b.

Check for DTCs.

Powertrain > Engine > Trouble Codes
50001 372

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



A

REPLACE GENERATOR ASSEMBLY

Click herePower Source / Network>M20C-FKS, M20D-FKS (BATTERY / CHARGING)>GENERATOR>REMOVAL


B

REPLACE ECM

Click hereEngine / Hybrid System>M20C-FKS, M20D-FKS (ENGINE CONTROL)>ECM>REMOVAL


C

CHECK FOR INTERMITTENT PROBLEMS

Click hereEngine / Hybrid System>M20C-FKS, M20D-FKS (ENGINE CONTROL)>SFI SYSTEM>CHECK FOR INTERMITTENT PROBLEMS