Diagnostic Procedure

STEP	INSPECTION	RESULTS	ACTION
1	DETERMINE IF MALFUNCTION CAUSE IS IMMOBILIZER SYSTEM OR OTHER Are any of the following conditions present? Engine does not start completely. PCM DTC P1260:00 is displayed.	Yes	Both conditions present: Go to Step 4.
1		No	Either or other condition present: Go to the next step.
2	INSPECT PUSH BUTTON START CONNECTOR CONNECTION Inspect the connection of push button start connector. Is the push button start connector securely connected to the coil antenna?	Yes	Go to the next step.
2		No	Reconnect the push button start securely, then repeat from Step 1.
3	DETERMINE IF MALFUNCTION CAUSE IS INSTRUMENT CLUSTER OR OTHER Does the security indicator light illuminate?	Yes	Go to the next step.
3		No	Inspect the instrument cluster and related wiring harness. (See INSTRUMENT CLUSTER INSPECTION .) Repair or replace the malfunctioning part according to the inspection results. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION .)
4	VERIFY IMMOBILIZER SYSTEM DTC Retrieve the immobilizer system DTC using the M-MDS. (See DTC INSPECTION [IMMOBILIZER SYSTEM] .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [IMMOBILIZER SYSTEM] .)
4		No	Go to the next step.
5	VERIFY PCM DTC Retrieve any DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.5] .) Are any continuous memory DTCs present?	Yes	Continuous memory DTC is displayed: Go to the applicable DTC inspection. (See DTC TABLE [SKYACTIV-G 2.5] .) Communication error message is displayed: Inspect the following: Open circuit in wiring harness between main relay terminal E and PCM terminal 2K Open circuit in wiring harness between main relay terminal C and PCM terminal 1CK or 2S Main relay (stuck open) Open or short circuit in wiring harness between DLC-2 and PCM terminal 2AK or 2AL Open or poor ground circuit (PCM terminal 1BZ, 1CL, 1CP, 1CT, 1CX, 1DB, 1DH, 1DL and 2AA) Poor connection of vehicle body ground Repair or replace the malfunctioning part according to the inspection results.
5		No	Go to the next step.
6	INSPECT POWER SUPPLY Access the VPWR PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.5] .) Verify the VPWR PID value. Is the VPWR PID value B+ ?	Yes	Go to the next step.
6		No	Inspect the following: Battery connection Battery condition (See BATTERY INSPECTION [SKYACTIV-G 2.5] .) Fuse (See NO. 1 BLOWN FUSES [SKYACTIV-G 2.5] .) If there is any malfunction: Repair or replace the malfunctioning part according to the inspection results, then repeat this step.
7	DETERMINE IF MALFUNCTION CAUSE IS STARTER RELAY CONTROL SIGNAL CIRCUIT OR OTHER Switch the ignition to START. Is a clicking sound heard from the starter relay?	Yes	Go to Step 20.
7		No	ATX: Go to Step 11. MTX: Go to the next step.
8	DETERMINE IF MALFUNCTION CAUSE IS STARTER INTERLOCK SWITCH OR OTHER Switch the ignition off. Short the starter interlock switch terminals A and B (wiring harness-side) using a jumper wire. Switch the ignition to START. Does the engine start?	Yes	Inspect the starter interlock switch. (See STARTER INTERLOCK SWITCH INSPECTION [SKYACTIV-G 2.5] .) If there is any malfunction: Replace the starter interlock switch, then repeat Step 7. (See STARTER INTERLOCK SWITCH REMOVAL/INSTALLATION [C66M-R] .) If there is no malfunction: Go to the next step.
8		No	Go to the next step.
9	INSPECT STARTER INTERLOCK SWITCH CONNECTOR CONDITION Switch the ignition off. Disconnect the starter interlock switch connector. Inspect for poor connection (such as damaged/pulled-out pins, corrosion). Is there any malfunction?	Yes	Repair or replace the connector and/or terminals, then repeat Step 7.
9		No	Go to the next step.
10	INSPECT STARTER INTERLOCK SWITCH GROUND CIRCUIT FOR OPEN CIRCUIT Verify that the starter interlock switch connector is disconnected. Inspect for continuity between starter interlock switch terminal B (wiring harness-side) and body ground. Is there continuity?	Yes	Go to Step 13.
10		No	Refer to the wiring diagram and verify whether or not there is a common connector between starter interlock switch terminal B and body ground. 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: Inspect for the following: Open circuit between starter interlock switch and body ground Loose or lifting ground point Repair or replace the malfunctioning part. Repeat Step 7.
11	INSPECT TCM CONNECTOR CONDITION Switch the ignition off. Disconnect the TCM connector. Inspect for poor connection (such as damaged/pulled-out pins, corrosion). Is there any malfunction?	Yes	Repair or replace the connector and/or terminals, then repeat Step 7.
11		No	Go to the next step.
12	INSPECT TCM CIRCUIT FOR OPEN CIRCUIT Verify that the TCM connector is disconnected. Inspect for continuity between TCM terminal J (wiring harness-side) and PCM terminal 2BD (wiring harness-side). Is there continuity?	Yes	Go to the next step.
12		No	Refer to the wiring diagram and verify whether or not there is a common connector between TCM terminal J and PCM terminal 2BD. 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. Repeat Step 7.
13	INSPECT STARTER RELAY Remove the starter relay. (See RELAY LOCATION .) Inspect the starter relay. (See RELAY INSPECTION .) Is there any malfunction?	Yes	Replace the starter relay. Repeat Step 7.
13		No	Go to the next step.
14	INSPECT START STOP UNIT CONNECTOR CONDITION Disconnect the start stop unit connector. Inspect for poor connection (such as damaged/pulled-out pins, corrosion). Is there any malfunction?	Yes	Repair or replace the connector and/or terminals, then repeat Step 7.
14		No	Go to the next step.
15	INSPECT STARTER RELAY CONTROL CIRCUIT FOR SHORT TO GROUND Starter relay is removed. Verify that the starter interlock switch connector is disconnected. (MTX) Verify that the TCM connector is disconnected. (ATX) Verify that the start stop unit connector is disconnected. Inspect for continuity between starter relay terminal A (wiring harness-side) and body ground. Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between starter relay terminal A and start stop unit terminal 2V. 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. Repeat Step 7.
15		No	Go to the next step.
16	INSPECT STARTER RELAY CONTROL CIRCUIT FOR OPEN CIRCUIT Starter relay is removed. Verify that the starter interlock switch connector is disconnected. (MTX) Verify that the TCM connector is disconnected. (ATX) Verify that the start stop unit connector is disconnected. Inspect for continuity between starter relay terminal A (wiring harness-side) and start stop unit terminal 2V (wiring harness-side). Is there continuity?	Yes	Go to the next step.
16		No	Refer to the wiring diagram and verify whether or not there is a common connector between starter relay terminal A and start stop unit terminal 2V. 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. Repeat Step 7.
17	INSPECT PCM CONNECTOR CONDITION Disconnect the PCM connector. Inspect for poor connection (such as damaged/pulled-out pins, corrosion). Is there any malfunction?	Yes	Repair or replace the connector and/or terminals, then repeat Step 7.
17		No	Go to the next step.
18	INSPECT STARTER RELAY CONTROL CIRCUIT FOR SHORT TO GROUND Starter relay is removed. Verify that the starter interlock switch connector is disconnected. (MTX) Verify that the TCM connector is disconnected. (ATX) Verify that the start stop unit and PCM connectors are disconnected. Inspect for continuity between starter relay terminal E (wiring harness-side) and body ground. Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: Starter relay terminal E-PCM terminal 2AZ Starter relay terminal E-Start stop unit terminal 1D 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. Repeat Step 7.
18		No	Go to the next step.
19	INSPECT STARTER RELAY CONTROL CIRCUIT FOR OPEN CIRCUIT Starter relay is removed. Verify that the starter interlock switch connector is disconnected. (MTX) Verify that the TCM connector is disconnected. (ATX) Verify that the start stop unit and PCM connectors are disconnected. Inspect for continuity between the following terminals (wiring harness-side): Starter relay terminal E-PCM terminal 2AZ Starter interlock switch terminal A-PCM terminal 2BD (MTX) Starter relay terminal E-Start stop unit terminal 1D Is there continuity?	Yes	Inspect the start stop unit. (See START STOP UNIT INSPECTION .) If there is any malfunction: Replace the start stop unit, then repeat Step 7. (See START STOP UNIT REMOVAL/INSTALLATION .) If there is no malfunction: Go to the next step.
19		No	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: Starter relay terminal E-PCM terminal 2AZ Starter interlock switch terminal A-PCM terminal 2BD (MTX) Starter relay terminal E-Start stop unit terminal 1D 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. Repeat Step 7.
20	INSPECT WIRING HARNESS OF STARTER POWER SUPPLY CIRCUIT Inspect the following circuit: Between battery positive terminal and starter terminal 1A Between battery positive terminal and starter relay terminal D Between starter relay terminal C and starter terminal 2A Is there any malfunction?	Yes	Repair or replace the suspected wiring harness.
20		No	Go to the next step.
21	INSPECT STARTING SYSTEM Inspect the starting system. (See STARTER INSPECTION [SKYACTIV-G 2.5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
21		No	Go to the next step.
22	INSPECT IMMOBILIZER SYSTEM RELATED CIRCUIT Inspect the following wiring harness and connectors: Between push button start terminal A and start stop unit terminal 1AC Between push button start terminal B and start stop unit terminal 1AE Between start stop unit terminal 2M-Front body control module (FBCM) terminal 2K Between start stop unit terminal 2O-Front body control module (FBCM) terminal 2I Between front body control module (FBCM) terminal 2P-PCM terminal 2AK Between front body control module (FBCM) terminal 2N-PCM terminal 2AL Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
22		No	Go to the next step.
23	VERIFY PRESENT MALFUNCTION DTC Perform the KOEO self test. (See KOEO/KOER SELF TEST [SKYACTIV-G 2.5] .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [SKYACTIV-G 2.5] .)
23		No	Go to the next step.
24	DETERMINE IF MALFUNCTION CAUSE IS BASE ENGINE OR OTHER Inspect for a seized flywheel (MTX) or drive plate (ATX). Is the flywheel (MTX) or drive plate (ATX) seized?	Yes	Repair or replace the malfunctioning part according to the inspection results.
24		No	Base engine malfunction or engine damage during compression due to liquid (such as water, fuel, or engine oil) penetration into cylinder. Overhaul or replace the engine.
25	Verify the test results. If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [SKYACTIV-G 2.5] .) If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform repair or diagnosis. If the vehicle is repaired, troubleshooting is completed. If the vehicle is not repaired or additional diagnostic information is not available, reprogram the PCM if a later calibration is available. Retest.