DTC B2574 [BCM]

id0902f5833100

Description

Front door lock-link switch (driver-side) lock-side circuit malfunction

Detection condition

•  Short to ground in front door lock-link switch (driver-side) lock-side circuit with the front door lock-link switch (driver-side) unlocked.

Possible cause

•  Front door latch and lock actuator (driver-side) connector or terminal malfunction

•  Front door lock-link switch (driver-side) malfunction

•  BCM connector or terminal malfunction

•  Short to ground in wiring harness between the following terminals:

―  Front door latch and lock actuator (driver-side) terminal 2E—BCM terminal 5N (L.H.D.)

―  Front door latch and lock actuator (driver-side) terminal 2B—BCM terminal 5N (R.H.D.)

•  BCM malfunction

Description	Front door lock-link switch (driver-side) lock-side circuit malfunction
Detection condition	• Short to ground in front door lock-link switch (driver-side) lock-side circuit with the front door lock-link switch (driver-side) unlocked.
Possible cause	• Front door latch and lock actuator (driver-side) connector or terminal malfunction • Front door lock-link switch (driver-side) malfunction • BCM connector or terminal malfunction • Short to ground in wiring harness between the following terminals: ― Front door latch and lock actuator (driver-side) terminal 2E—BCM terminal 5N (L.H.D.) ― Front door latch and lock actuator (driver-side) terminal 2B—BCM terminal 5N (R.H.D.) • BCM malfunction

Diagnostic procedure

Step	Inspection		Action
1	INSPECT FRONT DOOR LATCH AND LOCK ACTUATOR (DRIVER-SIDE) CONNECTOR • Turn the ignition switch to the OFF position. • Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZI-3.7].) • Disconnect the front door latch and lock actuator (driver-side) connector. • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. • Is there any malfunction?	Yes	Repair or replace the connector, then go to Step 5.
1		No	Go to the next step.
2	INSPECT FRONT DOOR LOCK-LINK SWITCH (DRIVER-SIDE) • Inspect the front door lock-link switch (driver-side). (See DOOR LOCK-LINK SWITCH INSPECTION.) • Is there any malfunction?	Yes	Replace the front door latch and lock actuator (driver-side), then go to Step 5. (See FRONT DOOR LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION.)
2		No	Go to the next step.
3	INSPECT BCM CONNECTOR • Disconnect the BCM connector. • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. • Is there any malfunction?	Yes	Repair or replace the connector, then go to Step 5.
3		No	Go to the next step.
4	INSPECT FOR SHORT TO GROUND IN FRONT DOOR LOCK-LINK SWITCH (DRIVER-SIDE) LOCK-SIDE CIRCUIT • Verify that the front door latch and lock actuator (driver-side) and BCM connectors are disconnected. • Inspect for continuity between the following terminal (wiring harness-side) and body ground: ― Front door latch and lock actuator (driver-side) terminal 2E (L.H.D.) ― Front door latch and lock actuator (driver-side) terminal 2B (R.H.D.) • Is there continuity?	Yes	Repair or replace the wiring harness which has a short to ground, then go to the next step.
4		No	Go to the next step.
5	VERIFY DTC TROUBLESHOOTING COMPLETED • Make sure to reconnect all disconnected connectors. • Reconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZI-3.7].) • Clear the DTC for the BCM using the M-MDS. (See CLEARING DTC [BCM].) • Retrieve the BCM DTCs using the M-MDS. (See DTC INSPECTION [BCM].) • Is the same DTC displayed?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the BCM. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.) Go to the next step.
5		No	Go to the next step.
6	VERIFY IF OTHER DTCs DISPLAYED • Are any other DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [BCM].)
6		No	DTC troubleshooting completed.