Toyota Camry (XV70): Lost Communication with Alternator Missing Message (P161A87)
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 | Memory |
Note |
|---|---|---|---|---|---|---|
| P161A87 |
Lost Communication with Alternator Missing Message |
Generator assembly or ECM communication stops for approximately 17 minutes or more with the engine switch on (IG). (1 trip detection logic) |
| Charge warning is not displayed |
DTC stored | SAE Code: P161A |
WIRING DIAGRAM
PROCEDURE
| 1. |
CHECK CHARGING SYSTEM |
(a) Check the charging system.
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| NG | .gif) | REPAIR OR REPLACE CHARGING SYSTEM |
|
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| 2. |
CHECK HARNESS AND CONNECTOR (ECM - GENERATOR ASSEMBLY) |
(a) Disconnect the C96 ECM connector.
(b) Disconnect the C60 generator assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
C96-135 (LIN) - C60-2 (LIN) |
Always | Below 1 Ω |
|
C96-135 (LIN) or C60-2 (LIN) - body ground |
Always | 10 kΩ or higher |
| OK | | REPLACE GENERATOR ASSEMBLY
|
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
READ NEXT:
Charging Failure
PROCEDURE
1. CHECK GENERATOR PULLEY WITH CLUTCH (ON-VEHICLE INSPECTION)
(a) Start the engine and visually check that the generator rotor assembly (fan) in the generator assembly is opera
Noise Occurs from V-ribbed Belt or Generator Assembly
PROCEDURE
1. CONFIRM PROBLEM SYMPTOM
(a) Confirm the problem symptom.
Symptom Proceed to
Noise occurs from V-ribbed belt.
A Noise occurs from generator assembly
SEE MORE:
On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE
1. INSPECT CAMSHAFT TIMING OIL CONTROL SOLENOID ASSEMBLY (a) Connect the Techstream to the DLC3.
(b) Start the engine. (c) Turn the Techstream on. (d) Inspect the camshaft timing oil control solenoid assembly (for intake side).
(1) Enter the following menus: Pow
Diagnosis System
DIAGNOSIS SYSTEM DESCRIPTION (a) Blind spot monitor data and Diagnostic Trouble Codes (DTCs) can be read from the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the Techstream to check for malfunctions and perform repairs.
CHECK DLC3 (a) Check the DLC3
