DTC B1566 [BCM]SM2445894
DTC B1566 [BCM]

id0902f5838200

DTC B1566

Door ajar circuit short to ground
DETECTION CONDITION
• Short to ground in wiring harness between BCM and rear door switches
POSSIBLE CAUSE
• Rear door switch connector or terminal malfunction
• BCM connector or terminal malfunction
• Short to ground in wiring harness between the following terminals:
― BCM terminal 5Y—Rear door switch (LH) terminal A
― BCM terminal 5Z—Rear door switch (RH) terminal A
• Rear door switch malfunction
• BCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
INSPECT REAR DOOR SWITCH CONNECTOR CONDITION
• Turn the ignition switch to the LOCK position.
• Disconnect the negative battery cable.
• Disconnect the rear door switch (LH) and (RH) connectors.
• Inspect the connectors and terminals for poor connection (such as damaged/pulled-out pins, and corrosion).
• Is there any malfunction?
Yes
Repair or replace the connector and/or terminal, then go to Step 5.
No
Go to the next step.
2
INSPECT BCM CONNECTOR CONDITION
• Disconnect the BCM connector.
• Inspect the connector and terminals for poor connection (such as damaged/pulled-out pins, and corrosion).
• Is there any malfunction?
Yes
Repair or replace the connector and/or terminal, then go to Step 5.
No
Go to the next step.
3
INSPECT REAR DOOR SWITCH SIGNAL CIRCUIT FOR SHORT TO GROUND
• Rear door switch (LH), (RH) and BCM connectors are disconnected.
• Inspect for continuity between the following terminals (wiring harness-side) and body ground:
― Rear door switch (LH) terminal A
― Rear door switch (RH) terminal A
• Is there continuity?
Yes
Repair or replace the wiring harness for a possible short to ground, then go to Step 5.
No
Go to the next step.
4
INSPECT REAR DOOR SWITCH
• Inspect the rear door switch (LH) and (RH). (See REAR DOOR LATCH AND LOCK ACTUATOR INSPECTION.)
• Is there any malfunction ?
Yes
Replace the rear door latch and lock actuator (LH) and/or (RH), then go to the next step.
(See REAR DOOR LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION.)
No
Go to the next step.
5
VERIFY TROUBLESHOOTING COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the BCM using the M-MDS. (See CLEARING DTC [BCM].)
• Perform the BCM DTC inspection using the M-MDS. (See DTC INSPECTION [BCM].)
• Is the same DTC present?
Yes
Replace the BCM.
(See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)
No
DTC troubleshooting completed.