Toyota Corolla Cross: Lost Communication with Battery Monitor Module Missing Message (P162B87)
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 |
MIL |
Warning Indicate |
Note |
|---|---|---|---|---|---|---|
|
P162B87 |
Lost Communication with Battery Monitor Module Missing Message |
except Mexico Models:
for Mexico Models:
|
|
Comes on (For Mexico Models: Does not come on) |
Charge warning light: Does not come on |
SAE Code: P162B |
MONITOR DESCRIPTION
except Mexico Models|
Related DTCs |
P162B: LIN communication abnormality |
|
Required Sensors/Components (Main) |
Battery state sensor assembly |
|
Required Sensors/Components (Related) |
- |
|
Frequency of Operation |
Continuous |
|
Duration |
60.5 seconds |
|
MIL Operation |
2 driving cycles |
|
Sequence of Operation |
None |
TYPICAL ENABLING CONDITIONS
except Mexico Models|
Monitor runs whenever the following DTCs are not stored |
None |
|
All of the following conditions are met |
- |
|
Ignition switch |
ON |
|
ECU supply voltage |
9.5 V or higher |
|
Starter |
Off |
TYPICAL MALFUNCTION THRESHOLDS
except Mexico Models|
Battery sensor LIN communication abnormality |
ON |
CONFIRMATION DRIVING PATTERN
HINT:
- After repair has been completed, clear the DTC and then check that the vehicle
has returned to normal by performing the following All Readiness check procedure
(except Mexico Models).
Click here
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- When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure
(except Mexico Models).
Click here
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the ignition switch off and wait for at least 30 seconds.
- Turn the ignition switch to ON [A].
- Wait 70 seconds or more.
- Enter the following menus: Powertrain / Engine / Trouble Codes [B].
- Read the DTCs.
HINT:
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
- Enter the following menus: Powertrain / Engine / Utility / All Readiness.
- Input the DTC: P162B87.
- Check the DTC judgment result.
HINT:
- If the judgment result is NORMAL, the system is normal.
- If the judgment result is ABNORMAL, the system has a malfunction.
- If the judgment result is INCOMPLETE, perform steps [A] through [B] again.
- [A] to [B]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
- When clearing the permanent DTCs, do not disconnect the cable from the battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.
WIRING DIAGRAM
Refer to the wiring diagram for the P062049.
Click here
CAUTION / NOTICE / HINT
NOTICE:
- Inspect the fuses for circuits related to this system before performing the following procedure.
- Before replacing the ECM, refer to Registration.
Click here
PROCEDURE
|
1. |
CHECK BATTERY STATE SENSOR ASSEMBLY INSTALLATION CONDITION |
(a) Check installation condition of the battery state sensor assembly.
| NG | .gif) |
INSTALL THE BATTERY STATE SENSOR ASSEMBLY CORRECTLY |
|
.gif)
|
2. |
CHECK CHARGING SYSTEM |
Click here
| NG | |
REPAIR OR REPLACE CHARGING SYSTEM |
|
|
3. |
CHECK HARNESS AND CONNECTOR (ECM - BATTERY STATE SENSOR ASSEMBLY) |
(a) Disconnect the C76 ECM connector.
(b) Disconnect the C133 battery state sensor assembly connector.
(c) Disconnect the C81 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 |
|---|---|---|
|
C133-2 (LIN) - C76-62 (LIN) |
Always |
Below 1 Ω |
|
C81-2 (LIN) - C76-62 (LIN) |
Always |
Below 1 Ω |
Standard Resistance (Check for Short):
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
C133-2 (LIN), C81-2 (LIN) or C76-62 (LIN) - Body ground |
Ignition switch off |
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 C133 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:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
C133-3 (+B) - Body ground |
Always |
11 to 14 V |
|
C133-1 (RBAT) - Body ground |
Always |
11 to 14 V |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
5. |
CLEAR DTC |
(a) Check for DTCs using the GTS, and then write them down.
Powertrain > Engine > Trouble Codes(b) Clear the DTCs.
Powertrain > Engine > Clear DTCs(c) Turn the ignition switch off, wait 30 seconds.
|
|
6. |
CHECK DTC OUTPUT |
(a) Start the engine.
(b) Allow the engine to idle for approximately 17 minutes or more.
(c) Enter the following menus.
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 |
READ NEXT:
Battery is Discharged
DESCRIPTION
General causes of battery depletion include the switches of electrical devices
mistakenly left on, service life of the battery, charging device malfunction, or
application of excessiv
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 gener
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.
SEE MORE:
Parts Location
PARTS LOCATION
ILLUSTRATION
*1
SPIRAL CABLE SUB-ASSEMBLY
*2
STEERING HEATER SWITCH
*3
STEERING WHEEL ASSEMBLY
- STEERING WHEEL HEATER UNIT
*4
NO. 2 RELAY BLOCK ASSEMBLY
- STRG HTR RELAY
Software Update
SOFTWARE UPDATE
CAUTION / NOTICE / HINT
HINT:
After replacing the forward recognition camera due to a system malfunction,
make sure to perform "Software Update".
The software of the forward recognition camera is always updated
to the latest software via wireless communication using
