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:
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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
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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
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