| Last Modified: 01-30-2024 | 6.11:8.1.0 | Doc ID: RM100000001ESSD |
| Model Year Start: 2019 | Model: RAV4 | Prod Date Range: [11/2018 - 10/2023] |
| Title: A25A-FKS (BATTERY / CHARGING): CHARGING SYSTEM: P162B87; Lost Communication with Battery Monitor Module Missing Message; 2019 - 2023 MY RAV4 [11/2018 - 10/2023] | ||
|
DTC |
P162B87 |
Lost Communication with Battery Monitor Module Missing Message |
DESCRIPTION
The ECM communicates with the battery state sensor 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 |
|---|---|---|---|---|---|---|
|
P162B87 |
Lost Communication with Battery Monitor Module Missing Message |
Battery state sensor assembly or ECM communication stops for approximately 17 minutes or more with the ignition switch ON (1 trip detection logic) |
|
Charge warning light does not come on |
DTC stored |
SAE Code: P162B |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following procedure.
PROCEDURE
|
1. |
CHECK BATTERY STATE SENSOR ASSEMBLY INSTALLATION CONDITION |
(a) Check installation condition of the battery state sensor assembly.
| NG |
|
|
|
2. |
CHECK CHARGING SYSTEM |
(a) Check the charging system.
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![2019 - 2023 MY RAV4 [11/2018 - 10/2023]; A25A-FKS (BATTERY / CHARGING): CHARGING SYSTEM: ON-VEHICLE INSPECTION](/t3Portal/stylegraphics/info.gif)
| NG |
|
REPAIR OR REPLACE CHARGING SYSTEM |
|
|
3. |
CHECK HARNESS AND CONNECTOR (ECM - BATTERY STATE SENSOR ASSEMBLY) |
(a) Disconnect the C40 ECM connector.
(b) Disconnect the A48 battery state sensor assembly connector.
(c) Disconnect the C46 generator 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 |
|---|---|---|
|
A48-2 (LIN) or C46-2 (LIN) - C40-62 (LIN) |
Always |
Below 1 Ω |
Standard Resistance (Check for Short):
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A48-2 (LIN), C46-2 (LIN) or C40-62 (LIN) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
4. |
CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) |
(a) Check that the battery state sensor assembly connector is securely connected.
OK:
The connector is securely connected.
(b) Disconnect the A48 battery state sensor assembly connector.
(c) Check the connector case and terminals for deformation or corrosion.
OK:
No deformation or corrosion.
|
(d) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
5. |
CLEAR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Trouble Codes.
(e) Check for DTCs, and note down any DTCs that are output.
Powertrain > Engine > Trouble Codes
(f) Enter the following menus: Powertrain / Engine / Trouble Codes.
(g) Clear the DTCs.
Powertrain > Engine > Clear DTCs
(h) Turn the ignition switch off, wait 30 seconds.
|
|
6. |
CHECK DTC OUTPUT |
(a) Connect the Techstream to the DLC3.
(b) Start the engine.
(c) Allow the engine to idle for approximately 17 minutes or more.
(d) Turn the Techstream on.
(e) Enter the following menus: Powertrain / Engine / Trouble Codes.
(f) Check for DTCs.
Powertrain > Engine > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
Only DTC P162B87 is output |
A |
|
DTC P161A87 and P162B87 are output. |
B |
|
DTCs are not output. |
C |
| A |
|
REPLACE BATTERY STATE SENSOR ASSEMBLY
|
| B |
|
REPLACE ECM
|
| C |
|
CHECK FOR INTERMITTENT PROBLEMS
|
|
|