Lexus ES: 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.
Click here .gif)
| NG | .gif) | REPAIR OR REPLACE CHARGING SYSTEM |
|
.gif)
| 2. | CHECK HARNESS AND CONNECTOR (ECM - GENERATOR ASSEMBLY) |
(a) Disconnect the or C77 ECM connector.
(b) Disconnect the C33 generator assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| C77-62 (LIN) - C33-2 (LIN) | Always | Below 1 Ω |
| C77-62 (LIN) or C33-2 (LIN) - body ground | Always | 10 kΩ or higher |
| OK | | REPLACE GENERATOR ASSEMBLY |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
READ NEXT:
On-vehicle Inspection
ON-VEHICLE INSPECTION CAUTION / NOTICE / HINT CAUTION:
To prevent injury due to contact with an operating V-ribbed belt or cooling fan, keep your hands and clothing away from the V-ribbed belt and
Data List / Active Test
DATA LIST / ACTIVE TEST DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. Th
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Charging System DTC No. Detection Item Warning Indicate Memory Note Link P161A87 Lost Communication with Alternator Missing Message Charge warning is
SEE MORE:
Terminals Of Ecu
TERMINALS OF ECU CHECK HYBRID VEHICLE CONTROL ECU Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition A32-15 (STP) - G59-6 (E1) GR - W-B Stop light switch signal Brake pedal depressed 11 to 14 V Brake pedal released 0 to 1.5 V A33-2
Components
COMPONENTS ILLUSTRATION *1 FRONT NO. 1 STABILIZER BAR BUSHING *2 FRONT NO. 1 STABILIZER BRACKET LH *3 FRONT NO. 1 STABILIZER BRACKET RH *4 FRONT STABILIZER BAR *5 FRONT STABILIZER LINK ASSEMBLY LH *6 FRONT STABILIZER LINK ASSEMBLY RH *7 CAP - - Tighteni
