DTC P161A-87: Lost Communication with Alternator Missing Message [11/2016 - ]: Procedure

1. Check the charging system.

   Refer to ON-VEHICLE INSPECTION [11/2016 - ] .

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE CHARGING SYSTEM 

Result: 

OK 

Go to next step 

1. Disconnect the C1 ECM connector.
2. Disconnect the C81 generator assembly connector.
3. Disconnect the C83 battery state sensor assembly connector.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   C83-2 (LIN) or C81-2 (LIN) - C1-135 (LIN)	Always	Below 1 Ω
   C83-2(LIN), C81-2 (LIN) or C1-135 (LIN) - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - GENERATOR ASSEMBLY) 

Result: 

OK 

Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Trouble Codes.
5. Check for DTCs, and then write them down.

   Powertrain > Engine > Trouble Codes 

6. Enter the following menus: Powertrain / Engine / Trouble Codes.
7. Clear the DTCs.

   Powertrain > Engine > Clear DTCs 

8. Turn the ignition switch off and wait 30 seconds.

NEXT 

Go to next step 

1. Connect the Techstream to the DLC3.
2. Start the engine.
3. Allow the engine to idle for approximately 17 minutes or more.
4. Turn the Techstream on.
5. Enter the following menus: Powertrain / Engine / Trouble Codes.
6. Check for DTCs.

   Powertrain > Engine > Trouble Codes 

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

Result: 

A 

REPLACE GENERATOR ASSEMBLY.  Refer to REMOVAL [11/2016 - ] .

Result: 

B 

REPLACE ECM.  Refer to REMOVAL [11/2016 - ] .

Result: 

C 

CHECK FOR INTERMITTENT PROBLEMS.  Refer to CHECK FOR INTERMITTENT PROBLEMS [11/2016 - ] .