Diagnostic Procedure

STEP	INSPECTION		ACTION
1	VERIFY BCM DTCs Clear the DTC using the M-MDS. (See CLEARING DTC [BCM] .) Switch the ignition to ON and wait for 5 s or more . Perform the BCM DTC inspection using the M-MDS. (See DTC INSPECTION [BCM] .) Is the same DTC present?	Yes	Go to the next step.
1		No	Go to Step 8.
2	VERIFY PCM DTCs Perform the PCM DTC inspection using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [MZR 2.5] .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [MZR 2.5] .)
2		No	Go to the next step.
3	INSPECT BATTERY Inspect the battery. (See BATTERY INSPECTION [MZR 2.5] .) Is there any malfunction?	Yes	Recharge or replace the battery, then go to Step 7. (See BATTERY RECHARGING [MZR 2.5] .) (See BATTERY REMOVAL/INSTALLATION [MZR 2.5] .)
3		No	Go to the next step.
4	INSPECT GENERATOR Inspect the generator. (See GENERATOR INSPECTION [MZR 2.5] .) Is there any malfunction?	Yes	Replace the generator, then go to Step 7. (See GENERATOR REMOVAL/INSTALLATION [MZR 2.5] .)
4		No	Go to the next step.
5	INSPECT BCM CONNECTOR AND TERMINALS Switch the ignition to off. Disconnect the negative battery cable. 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.
5		No	Go to the next step.
6	INSPECT BCM POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT AND SHORT TO GROUND Verify that the BCM connector is disconnected. Reconnect the negative battery cable. Switch the ignition to ON. Measure the voltage at the following terminals (wiring harness-side): BCM terminal 4T BCM terminal 3J BCM terminal 4S Is the voltage B+ ?	Yes	Go to the next step.
6		No	Inspect the following fuse: METER 10 A fuse ROOM 15 A fuse HAZARD 10 A fuse If the fuse is blown: Repair or replace the wiring harness for a possible short to ground. Replace the fuse. If the fuse is deteriorated: Replace the fuse. If the fuse is normal: Repair or replace the wiring harness for a possible open circuit. 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. (See CLEARING DTC [BCM] .) Switch the ignition to ON and wait for 5 s or more . Perform the BCM DTC inspection using the M-MDS. (See DTC INSPECTION [BCM] .) Is the same DTC present?	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.
7		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] .)
8		No	DTC troubleshooting completed.