Diagnostic Procedure

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	PERFORM PCM DTC INSPECTION Perform the PCM DTC inspection using the M-MDS. See ON-BOARD DIAGNOSTIC TEST [L5] . See ON-BOARD DIAGNOSTIC TEST [MZI-3.7] . Are any DTCs present?	Yes	Go to the applicable DTC inspection. See DTC TABLE [L5] . See DTC TABLE [MZI-3.7] .
1		No	Go to the next step.
2	INSPECT FUSE Switch the ignition to off. Disconnect the negative battery cable. Remove and inspect the following fuses: IG KEY1 40 A fuse METER 15 A fuse Are there any malfunction?	Yes	Replace the malfunctioning fuse, then go to Step 13
2		No	Go to the next step.
3	INSPECT BATTERY Inspect the battery See BATTERY INSPECTION [L5] . See BATTERY INSPECTION [MZI-3.7] . Is there any malfunction?	Yes	Recharge or replace the battery, then go to Step 13. See BATTERY RECHARGING [L5] . See BATTERY RECHARGING [MZI-3.7] . See BATTERY REMOVAL/INSTALLATION [L5] . See BATTERY REMOVAL/INSTALLATION [MZI-3.7] .
3		No	Go to the next step
4	INSPECT GENERATOR Inspect the generator See GENERATOR INSPECTION [L5] . See GENERATOR INSPECTION [MZI-3.7] . Is there any malfunction?	Yes	Replace the generator, then go to Step 13. See GENERATOR REMOVAL/INSTALLATION [L5] . See GENERATOR REMOVAL/INSTALLATION [MZI-3.7] .
4		No	Go to the next step.
5	INSPECT IGNITION SWITCH CONNECTOR CONDITION Disconnect the ignition switch connector. Inspect for poor connection (damaged/ pulled-out pins, corrosion) Is there any malfunction?	Yes	Repair or replace the connector or terminal, then go to Step 13.
5		No	Go to the next step.
6	INSPECT BSM CONTROL MODULE (LH/RH) POWER SUPPLY CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT Install the fuses Reconnect the negative battery cable Switch the ignition to ON. Measure the voltage between ignition switch terminal E (wiring harness-side) and body ground Is the voltage within 9-16 V ?	Yes	Go to the next step
6		No	Repair or replace the wiring harness for a possible short to ground or open circuit, then go to Step 13
7	INSPECT IGNITION SWITCH Inspect the ignition switch See IGNITION SWITCH INSPECTION [WITHOUT ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] . Is there any malfunction?	Yes	Replace the ignition switch, then go to Step 13. See IGNITION SWITCH REMOVAL/INSTALLATION [WITHOUT ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] .
7		No	Go to the next step
8	INSPECT BCM CONNECTOR CONDITION Switch the ignition to off. Disconnect the BCM connector Inspect for poor connection (damaged/ pulled-out pins, corrosion) Is there any malfunction?	Yes	Repair or replace the connector or terminal, then go to Step 13
8		No	Go to the next step
9	INSPECT BSM CONTROL MODULE (LH/RH) POWER SUPPLY CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT Reconnect the ignition switch connector. Switch the ignition to ON Measure the voltage between BCM terminal 4A (wiring harness-side) and body ground Is the voltage within 9-16 V?	Yes	Go to the next step
9		No	Repair or replace the wiring harness for a possible short to ground or open circuit, then go to Step 13
10	INSPECT BCM Switch the ignition to off Reconnect the BCM connector. Switch the ignition to ON Measure the voltage between following terminals and body ground: BCM terminal 4A (wiring harness-side) BCM terminal 7O (wiring harness-side) Is the voltage normal? See BODY CONTROL MODULE (BCM) INSPECTION .	Yes	Replace the BCM, then go to Step 13. See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION .
10		No	Go to the next step.
11	INSPECT BSM CONTROL MODULE (LH/RH) CONNECTOR CONDITION Switch the ignition to oft Disconnect the BSM control module connector. Inspect for poor connection (damaged/ pulled-out pins, corrosion) Is there any malfunction?	Yes	Repair or replace the connector or terminal, then go to Step 13.
11		No	Go to the next step.
12	INSPECT BSM CONTROL MODULE (LH/RH) POWER SUPPLY CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT Switch the ignition to ON. Measure the voltage between BSM control module (LH/RH) terminal B (wiring harness-side) and body ground. Is the voltage within 9-16 V	Yes	Go to the next step.
12		No	Repair or replace the wiring harness for a possible short to ground or open circuit, then go to the next step.
13	VERIFY TROUBLESHOOTING COMPLETED Switch the ignition to off Install the fuses. Make sure to reconnect the disconnected connectors Reconnect the negative battery cable. Clear the DTC from the BSM control module memory using the M-MDS. See CLEARING DTC [BLIND SPOT MONITORING (BSM)] . Perform the self-test with M-MDS See DTC INSPECTION [BLIND SPOT MONITORING (BSM)] . Is the same DTC present?	Yes	Replace the BSM control module (LH/RH), then go to the next step. See BLIND SPOT MONITORING (BSM) CONTROL MODULE REMOVAL/INSTALLATION .
13		No	Go to the next step.
14	VERIFY THAT NO OTHER DTCs ARE RECORDED Are any DTCs present?	Yes	Go to the applicable DTC inspection. See DTC TABLE [BLIND SPOT MONITORING (BSM)] .
14		No	DTC troubleshooting completed.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	PERFORM PCM DTC INSPECTION Perform the PCM DTC inspection using the M-MDS. See ON-BOARD DIAGNOSTIC TEST [L5] . See ON-BOARD DIAGNOSTIC TEST [MZI-3.7] . Are any DTCs present?	Yes	Go to the applicable DTC inspection. See DTC TABLE [L5] . See DTC TABLE [MZI-3.7] .
1		No	Go to the next step.
2	INSPECT FUSE Switch the ignition to off. Disconnect the negative battery cable. Remove and inspect the following fuses: IG KEY1 40 A fuse METER 15 A fuse Are there any malfunction?	Yes	Replace the malfunctioning fuse, then go to Step 13
2		No	Go to the next step.
3	INSPECT BATTERY Inspect the battery See BATTERY INSPECTION [L5] . See BATTERY INSPECTION [MZI-3.7] . Is there any malfunction?	Yes	Recharge or replace the battery, then go to Step 13. See BATTERY RECHARGING [L5] . See BATTERY RECHARGING [MZI-3.7] . See BATTERY REMOVAL/INSTALLATION [L5] . See BATTERY REMOVAL/INSTALLATION [MZI-3.7] .
3		No	Go to the next step
4	INSPECT GENERATOR Inspect the generator See GENERATOR INSPECTION [L5] . See GENERATOR INSPECTION [MZI-3.7] . Is there any malfunction?	Yes	Replace the generator, then go to Step 13 See GENERATOR REMOVAL/INSTALLATION [L5] . See GENERATOR REMOVAL/INSTALLATION [MZI-3.7] .
4		No	Go to the next step.
5	INSPECT RELAY BLOCK CONNECTOR CONDITION Disconnect the relay block connector Inspect for poor connection (damaged/ pulled-out pins, corrosion) Is there any malfunction?	Yes	Repair or replace the connector or terminal, then go to Step 13.
5		No	Go to the next step.
6	INSPECT BSM CONTROL MODULE (LH/RH) POWER SUPPLY CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT Install the fuses Reconnect the negative battery cable. Switch the ignition to ON Measure the voltage between relay block terminal 1A (wiring harness-side) and body ground. Is the voltage within 9-16 V?	Yes	Go to the next step.
6		No	Repair or replace the wiring harness for a possible short to ground or open circuit, then go to Step 13.
7	INSPECT RELAY BLOCK Inspect the relay block. See RELAY BLOCK INSPECTION [WITH ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] . Is there any malfunction?	Yes	Replace the relay block, then go to Step 13. See RELAY BLOCK REMOVAL/INSTALLATION [WITH ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] .
7		No	Go to the next step.
8	INSPECT BCM CONNECTOR CONDITION Switch the ignition to off Disconnect the BCM connector. Inspect for poor connection (damaged/ pulled-out pins, corrosion) Is there any malfunction?	Yes	Repair or replace the connector or terminal, then go to Step 13.
8		No	Go to the next step.
9	INSPECT BSM CONTROL MODULE (LH/RH) POWER SUPPLY CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT Reconnect the relay block connector Switch the ignition to ON. Measure the voltage between BCM terminal 4A (wiring harness-side) and body ground. Is the voltage within 9-16 V?	Yes	Go to the next step.
9		No	Repair or replace the wiring harness for a possible short to ground or open circuit, then go to Step 13.
10	INSPECT BCM Switch the ignition to off Reconnect the BCM connector Switch the ignition to ON Measure the voltage between following terminals and body ground: BCM terminal 4A (wiring harness-side) BCM terminal 7O (wiring harness-side) Is the voltage normal? See BODY CONTROL MODULE (BCM) INSPECTION .	Yes	Replace the BCM, then go to Step 13. See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION .
10		No	Go to the next step.
11	INSPECT BSM CONTROL MODULE (LH/RH) CONNECTOR CONDITION Switch the ignition to off. Disconnect the BSM control module connector. Inspect for poor connection (damaged/ pulled-out pins, corrosion) Is there any malfunction?	Yes	Repair or replace the connector or terminal, then go to Step 13.
11		No	Go to the next step.
12	INSPECT BSM CONTROL MODULE (LH/RH) POWER SUPPLY CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT Switch the ignition to ON. Measure the voltage between BSM control module (LH/RH) terminal B (wiring harness-side) and body ground Is the voltage within 9-16 V ?	Yes	Go to the next step.
12		No	Repair or replace the wiring harness for a possible short to ground or open circuit, then go to the next step.
13	VERIFY TROUBLESHOOTING COMPLETED Switch the ignition to off Install the fuses. Make sure to reconnect the disconnected connectors. Reconnect the negative battery cable. Clear the DTC from the BSM control module memory using the M-MDS See CLEARING DTC [BLIND SPOT MONITORING (BSM)] . Perform the self-test with M-MDS. See DTC INSPECTION [BLIND SPOT MONITORING (BSM)] . Is the same DTC present?	Yes	Replace the BSM control module (LH/RH), then go to the next step. See BLIND SPOT MONITORING (BSM) CONTROL MODULE REMOVAL/INSTALLATION .
13		No	Go to the next step.
14	VERIFY THAT NO OTHER DTCs ARE RECORDED Are any DTCs present?	Yes	Go to the applicable DTC inspection. See DTC TABLE [BLIND SPOT MONITORING (BSM)] .
14		No	DTC troubleshooting completed.