MAIN POWER CANNOT SWITCH OFF

id300300000700

Outline

Malfunction symptom	Main power cannot switch OFF
Description	•  While the main power is switched ON (READY on), the main power cannot switch OFF even if the power switch is operated. •  The power switch POWER indicator light turns on even when the main power is switched OFF. •  The instrument cluster indication does not disappear even when the main power is switched OFF.
Possible cause	The PCM receives a mistaken main power status signal from the body control module (BCM). •  Short to power supply in IG1 power supply circuit •  Short to power supply in IG1 relay drive circuit The body control module (BCM) does not recognize the power switch operation: •  Power switch signal circuit malfunction (perform troubleshooting procedure [PUSH BUTTON START SYSTEM DOES NOT OPERATE] of security and Locks symptom troubleshooting) ―  Short to power supply in power switch signal circuit ―  Open circuit in power switch signal circuit •  Power switch malfunction •  Body control module (BCM) malfunction Power switch POWER indicator light false illumination: •  Power switch POWER indicator light control circuit malfunction ―  Short to ground in power switch POWER indicator light control circuit •  Body control module (BCM) malfunction
System wiring diagram
Connector diagram

Diagnostic Procedure

Step	Inspection	Results	Action
1	VERIFY DTCs •  Perform the DTC inspections for the following modules. (See DTC INSPECTION.) ―  PCM ―  Body control module (BCM) •  Is a DTC displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [PCM (e-SKYACTIV)].) (See DTC TABLE [BODY CONTROL MODULE (BCM) (E)].)
		No	Go to the next step.
2	INSPECT IG1 RELAY NO. 1 FOR MALFUNCTION •  Inspect the applicable part. (See RELAY INSPECTION.) •  Is the part normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See RELAY LOCATION [(E)].)
3	INSPECT PCM IG1 POWER SUPPLY CIRCUIT FOR SHORT TO POWER SUPPLY •  Inspect the applicable circuit for a short to power supply. (See CIRCUIT INSPECTION.) •  Is the circuit normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification.
4	VERIFY PUSH BUTTON START SYSTEM OPERATION •  Perform the troubleshooting procedure according to the symptom troubleshooting for [PUSH BUTTON START SYSTEM DOES NOT OPERATE] of the security and locks. (See PUSH BUTTON START SYSTEM DOES NOT OPERATE [SECURITY AND LOCKS].) •  Is the troubleshooting result normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification.
5	INSPECT POWER SWITCH INDICATOR FOR MALFUNCTION •  Inspect the applicable part. (See POWER SWITCH INSPECTION.) •  Is the part normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See POWER SWITCH REMOVAL/INSTALLATION.)
6	INSPECT POWER SWITCH POWER INDICATOR LIGHT CONTROL CIRCUIT IN POWER SWITCH FOR SHORT TO GROUND •  Inspect the applicable circuit for a short to ground. (See CIRCUIT INSPECTION.) •  Is the circuit normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification.
Repair completion verification	VERIFY THAT VEHICLE IS REPAIRED •  Install/connect the part removed/disconnected during the troubleshooting procedure. •  Has the malfunction symptom been eliminated?	Yes	Complete the symptom troubleshooting. (Explain contents of repair to customer)
		No	Refer to the CAN (controller area network) malfunction diagnosis flow to inspect for a CAN communication error.   (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [L.H.D. (E)] .) (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [R.H.D.] .)