DTC B109E:87 [BCM]

id0902f5347600


Vehicles Without Advanced Keyless Entry and Push Button Start System

DESCRIPTION

Communication error between keyless receiver and BCM
DETECTION CONDITION
•  BCM cannot receive the signal from keyless receiver continuously 12 times.
POSSIBLE CAUSE
•  Keyless receiver connector or terminals malfunction
•  BCM connector or terminals malfunction
•  Short to ground in wiring harness between keyless receiver terminal D and BCM terminal 4K
•  Open circuit in wiring harness between keyless receiver terminal D and BCM terminal 4K
•  Keyless receiver malfunction
•  BCM malfunction

Diagnostic Procedure

STEP

INSPECTION

ACTION
1
CONFIRM BCM DTC
•  Clear the DTC using the M-MDS.
•  Perform the BCM DTC inspection using the M-MDS.
•  Is the same DTC present?
Yes
Go to the next step.
No
Go to Step 8.
2
INSPECT KEYLESS RECEIVER CONNECTOR AND TERMINALS
•  Switch the ignition to off.
•  Disconnect the negative battery cable.
•  Disconnect the keyless receiver connector.
•  Inspect the connector and terminals (corrosion, damage, pin disconnection).
•  Is there any malfunction?
Yes
Repair or replace the connector or terminals, then go to Step 7.
No
Go to the next step.
3
INSPECT BCM CONNECTOR AND TERMINALS
•  Disconnect the BCM connector.
•  Inspect the connector and terminals (corrosion, damage, pin disconnection).
•  Is there any malfunction?
Yes
Repair or replace the connector or terminals, then go to Step 7.
No
Go to the next step.
4
INSPECT KEYLESS RECEIVER CIRCUIT FOR SHORT TO GROUND
•  Verify that the keyless receiver and BCM connectors are disconnected.
•  Inspect for continuity between keyless receiver terminal D (wiring harness-side) and body ground.
•  Is there continuity?
Yes
Repair or replace the wiring harness for a possible short to ground, then go to Step 7.
No
Go to the next step.
5
INSPECT KEYLESS RECEIVER CIRCUIT FOR OPEN CIRCUIT
•  Verify that the keyless receiver and BCM connectors are disconnected.
•  Inspect for continuity between keyless receiver terminal D (wiring harness-side) and BCM terminal 4K (wiring harness-side).
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness for a possible open circuit, then go to Step 7.
6
INSPECT KEYLESS RECEIVER
•  Inspect the keyless receiver.
•  Is there any malfunction?
Yes
Replace the keyless receiver, then go to the next step.
(See KEYLESS RECEIVER REMOVAL/INSTALLATION.)
No
Go to the next step.
7
VERIFY TROUBLESHOOTING COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Reconnect the negative battery cable.
•  Clear the DTC using the M-MDS.
•  Perform the BCM DTC inspection using the M-MDS.
•  Is the same DTC present?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the BCM.
Go to the next step.
No
Go to the next step.
8
VERIFY THAT NO OTHER DTCs ARE PRESENT
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [BCM].)
No
DTC troubleshooting completed.


Vehicles With Advanced Keyless Entry and Push Button Start System

DESCRIPTION

Communication error between keyless receiver and BCM
DETECTION CONDITION
•  BCM cannot receive the signal from keyless receiver continuously 12 times.
POSSIBLE CAUSE
•  Keyless control module DTC is stored.
•  Keyless receiver connector or terminals malfunction
•  Keyless control module connector or terminals malfunction
•  Short to ground in wiring harness between keyless receiver terminal C and keyless control module terminal 3W
•  Open circuit in wiring harness between keyless receiver terminal C and keyless control module terminal 3W
•  BCM connector or terminals malfunction
•  Short to ground in wiring harness between keyless control module terminal 3X and BCM terminal 4K
•  Open circuit in wiring harness between keyless control module terminal 3X and BCM terminal 4K
•  Keyless receiver malfunction
•  Keyless control module malfunction
•  BCM malfunction

Diagnostic Procedure

STEP

INSPECTION

ACTION
1
CONFIRM BCM DTC
•  Clear the DTC using the M-MDS.
•  Perform the BCM DTC inspection using the M-MDS.
•  Is the same DTC present?
Yes
Go to the next step.
No
Go to Step 13.
2
CONFIRM KEYLESS CONTROL MODULE DTC
•  Perform the keyless control module DTC inspection using the M-MDS.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM].)
No
Go to the next step.
3
INSPECT KEYLESS RECEIVER CONNECTOR AND TERMINALS
•  Switch the ignition to off.
•  Disconnect the negative battery cable.
•  Disconnect the keyless receiver connector.
•  Inspect the connector and terminals (corrosion, damage, pin disconnection).
•  Is there any malfunction?
Yes
Repair or replace the connector or terminals, then go to Step 12.
No
Go to the next step.
4
INSPECT KEYLESS CONTROL MODULE CONNECTOR AND TERMINALS
•  Disconnect the keyless control module connector.
•  Inspect the connector and terminals (corrosion, damage, pin disconnection).
•  Is there any malfunction?
Yes
Repair or replace the connector or terminals, then go to Step 12.
No
Go to the next step.
5
INSPECT KEYLESS RECEIVER CIRCUIT FOR SHORT TO GROUND
•  Verify that the keyless receiver and keyless control module connectors are disconnected.
•  Inspect for continuity between keyless receiver terminal C (wiring harness-side) and body ground.
•  Is there continuity?
Yes
Repair or replace the wiring harness for a possible short to ground, then go to Step 12.
No
Go to the next step.
6
INSPECT KEYLESS RECEIVER CIRCUIT FOR OPEN CIRCUIT
•  Verify that the keyless receiver and keyless control module connectors are disconnected.
•  Inspect for continuity between keyless receiver terminal C (wiring harness-side) and keyless control module terminal 3W (wiring harness-side).
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness for a possible open circuit, then go to Step 12.
7
INSPECT BCM CONNECTOR AND TERMINALS
•  Disconnect the BCM connector.
•  Inspect the connector and terminals (corrosion, damage, pin disconnection).
•  Is there any malfunction?
Yes
Repair or replace the connector or terminals, then go to Step 12.
No
Go to the next step.
8
INSPECT KEYLESS CONTROL MODULE CIRCUIT FOR SHORT TO GROUND
•  Verify that the keyless receiver, keyless control module and BCM connectors are disconnected.
•  Inspect for continuity between keyless control module terminal 3X (wiring harness-side) and body ground.
•  Is there continuity?
Yes
Repair or replace the wiring harness for a possible short to ground, then go to Step 12.
No
Go to the next step.
9
INSPECT KEYLESS CONTROL MODULE CIRCUIT FOR OPEN CIRCUIT
•  Verify that the keyless receiver, keyless control module and BCM connectors are disconnected.
•  Inspect for continuity between keyless control module terminal 3X (wiring harness-side) and BCM terminal 4K (wiring harness-side).
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness for a possible open circuit, then go to Step 12.
10
INSPECT KEYLESS RECEIVER
•  Inspect the keyless receiver.
•  Is there any malfunction?
Yes
Replace the keyless receiver, then go to Step 12.
(See KEYLESS RECEIVER REMOVAL/INSTALLATION.)
No
Go to the next step.
11
PERFORM DTC INSPECTION AND VERIFY THAT MALFUNCTIONING PART IS KEYLESS CONTROL MODULE
•  Make sure to reconnect all disconnected connectors.
•  Reconnect the negative battery cable.
•  Clear the DTC using the M-MDS.
•  Perform the BCM DTC inspection using the M-MDS.
•  Is the same DTC present?
Yes
Replace the keyless control module, then go to the next step.
(See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION.)
No
Go to Step 13.
12
VERIFY TROUBLESHOOTING COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Reconnect the negative battery cable.
•  Clear the DTC using the M-MDS.
•  Perform the BCM DTC inspection using the M-MDS.
•  Is the same DTC present?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the BCM.
Go to the next step.
No
Go to the next step.
13
VERIFY THAT NO OTHER DTCs ARE PRESENT
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [BCM].)
No
DTC troubleshooting completed.