Diagnostic Procedure

DIAGNOSTIC PROCEDURE

Step	Inspection		Action
1	VERIFY PCM DTCs Retrieve the PCM DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.0, SKYACTIV-G 2.5)] .) Are any DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [PCM (SKYACTIV-G 2.0, SKYACTIV-G 2.5)] .)
1		No	Go to the next step.
2	INSPECT BATTERY Inspect the battery. (See BATTERY INSPECTION .) Is the battery normal?	Yes	Go to the next step.
2		No	Recharge or replace the battery, then go to Step 9. (See BATTERY RECHARGING .) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
3	INSPECT GENERATOR Inspect the generator. (See GENERATOR INSPECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) Is the generator normal?	Yes	Go to the next step.
3		No	Replace the generator, then go to Step 9. (See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
4	INSPECT IG1 RELAY Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .) Remove the IG1 relay. (See RELAY LOCATION .) Inspect the IG1 relay. (See RELAY INSPECTION .) Is the IG1 relay normal?	Yes	Go to the next step.
4		No	Replace the IG1 relay, then go to Step 9. (See RELAY LOCATION .)
5	VERIFY RADAR UNIT POWER SUPPLY VOLTAGE Verify that the IG1 relay is removed. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .) Measure the voltage at the IG1 relay terminal D (wiring harness-side). Is the voltage B+?	Yes	Go to the next step.
5		No	Inspect the MAIN 200 A fuse. If the fuse is blown: Refer to the wiring diagram and verify whether or not there is a common connector between MAIN 200 A fuse and IG1 relay terminal D. If there is a common connector: Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has a short to ground. Replace the fuse. If the fuse is damaged: Replace the fuse. If the fuse is normal: Refer to the wiring diagram and verify whether or not there is a common connector between battery positive terminal fuse and IG1 relay terminal D. If there is a common connector: Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has an open circuit. Go to Step 9.
6	INSPECT RADAR UNIT CONNECTOR CONDITION Remove front bumper. (See FRONT BUMPER REMOVAL/INSTALLATION .) Disconnect the radar unit connector. Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. Is the connector normal?	Yes	Go to the next step.
6		No	Repair or replace the connector, then go to Step 9.
7	INSPECT IG1 RELAY CIRCUIT FOR SHORT TO GROUND Verify that the IG1 relay is removed. Verify that the radar unit connector is disconnected. Inspect for continuity between the following terminals (wiring harness-side) and body ground: IG1 relay terminal C Radar unit terminal E Is there continuity?	Yes	Inspect the C/U IG1 15 A fuse. If the fuse is blown: Refer to the wiring diagram and verify whether or not there is a common connector between C/U IG1 15 A fuse and radar unit terminal E. If there is a common connector: Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has a short to ground. Replace the fuse. If the fuse is normal: Refer to the wiring diagram and verify whether or not there is a common connector between IG1 relay terminal C and C/U IG1 15 A fuse. If there is a common connector: Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has a short to ground. Go to Step 9.
7		No	Go to the next step.
8	INSPECT IG1 RELAY CIRCUIT FOR OPEN CIRCUIT Verify that the IG1 relay is removed. Verify that the radar unit connector is disconnected. Inspect for continuity between IG1 relay terminal C (wiring harness-side) and radar unit terminal E (wiring harness-side). Is there continuity?	Yes	Go to the next step.
8		No	Inspect the C/U IG1 15 A fuse. If the fuse is damaged: Replace the fuse. If the fuse is normal: Refer to the wiring diagram and verify whether or not there is a common connector between IG1 relay terminal C and radar unit terminal E. If there is a common connector: Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has an open circuit. Go to the next step.
9	VERIFY THAT REPAIRS HAVE BEEN COMPLETED Always reconnect all disconnected connectors. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .) Clear the DTC for the radar unit using the M-MDS. (See CLEARING DTC [RADAR UNIT] .) Retrieve the radar unit DTCs using the M-MDS. (See DTC INSPECTION [RADAR UNIT] .) Is the same DTC displayed?	Yes	Repeat the inspection from Step 1. If the malfunction recurs, replace the radar unit. (See RADAR UNIT REMOVAL/INSTALLATION .) Go to the next step.
9		No	Go to the next step.
10	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 [RADAR UNIT] .)
10		No	DTC troubleshooting completed.