DTC B1566 [BCM]

id0902f5838200

Description | Rear door switch (LH)/(RH) circuit malfunction
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Detection condition | • Short to ground in rear door switch (LH) or (RH) circuit with the rear doors closed (rear door switches off).
Possible cause | • Rear door switch (LH) connector or terminal malfunction • Rear door switch (LH) malfunction • BCM connector or terminal malfunction • Short to ground in wiring harness between rear door switch (LH) terminal A and BCM terminal 6R • Rear door switch (RH) connector or terminal malfunction • Rear door switch (RH) malfunction • Short to ground in wiring harness between rear door switch (RH) terminal A and BCM terminal 6Q • BCM malfunction

Diagnostic procedure

Step | Inspection | Action
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1 | INSPECT REAR DOOR SWITCH (LH) CONNECTOR • Turn the ignition switch to the OFF position. • Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZI-3.7].) • Disconnect the rear door switch (LH) 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 8.
No | Go to the next step.
2 | INSPECT REAR DOOR SWITCH (LH) • Inspect the rear door switch (LH). (See DOOR SWITCH INSPECTION.) • Is there any malfunction? | Yes | Replace the rear door switch (LH), then go to Step 8. (See DOOR SWITCH REMOVAL/INSTALLATION.)
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 8.
No | Go to the next step.
4 | INSPECT FOR SHORT TO GROUND IN REAR DOOR SWITCH (LH) CIRCUIT • Verify that the rear door switch (LH) and BCM connectors are disconnected. • Inspect for continuity between rear door switch (LH) terminal A (wiring harness-side) and body ground. • Is there continuity? | Yes | Repair or replace the wiring harness which has a short to ground, then go to Step 8.
No | Go to the next step.
5 | INSPECT REAR DOOR SWITCH (RH) CONNECTOR • Disconnect the rear door switch (RH) 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 8.
No | Go to the next step.
6 | INSPECT REAR DOOR SWITCH (RH) • Inspect the rear door switch (RH). (See DOOR SWITCH INSPECTION.) • Is there any malfunction? | Yes | Replace the rear door switch (RH), then go to Step 8. (See DOOR SWITCH REMOVAL/INSTALLATION.)
No | Go to the next step.
7 | INSPECT FOR SHORT TO GROUND IN REAR DOOR SWITCH (RH) CIRCUIT • Verify that the rear door switch (LH), (RH) and BCM connectors are disconnected. • Inspect for continuity between rear door switch (RH) terminal A (wiring harness-side) and body ground. • Is there continuity? | Yes | Repair or replace the wiring harness which has a short to ground, then go to the next step.
No | Go to the next step.
8 | 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.
No | Go to the next step.
9 | 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].)
No | DTC troubleshooting completed.