13159560-13159558-13159570-13159572-13159575-13159556-13159562-13159566-13159564-13159568

Component Location

General Description

With start signal from IG key, ECM grounds a coil of starter relay in order to start engine. In case of ISG, ECM starts engine if idle stop release condition or auto-start condition are met.

DTC Description

ECM set DTC P0616 if starter relay is short to ground or engine is not starting when auto-starting condition is met.

DTC Detecting Condition

Item		Detecting Condition	Possible Cause
Case1	DTC Strategy	● Circuit continuity check, low	● Poor connection ● Short to ground in control circuit ● Starter Relay
	Enable Conditions	● Engine speed > 240rpm ● Battery voltage <16V, >10.73V
	Threshold Value	● Short circuit to Ground
	Diagnostic Time	● Continuous
Case2	DTC Strategy	● Mechanical blocked engine
	Enable Conditions	● Delta battery voltage ≤ -3V ● Counter schedule of phase signal ≤ 2times ● Automatic start
	Threshold Value	● Engine speed = 0rpm
	Diagnostic Time	● 0.45 sec
MIL ON Condition		● DTC only

Specification

Item	Specification
Coil Resistance (Ω)	70 ~ 120

Diagnostic Circuit Diagram

Monitor GDS Data

Connect GDS to Data Link Connector(DLC).

Engine start.

Check input, output value and status of ISG system.

(TPS, ECTS, RPM, Clutch S/W, Door S/W etc. )

Are the parameters displayed correctly ?

▶ Fault is intermittent caused by poor contact in the sensor’s and/or ECM’s connector or was repaired and ECM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "Verification of vehicle Repair" procedure.

▶ If there is malfunction on the TPS, ECTS, RPM, Clutch S/W, Door S/W, Auto-Starting will not be functioning. Perform troubleshoot the part that has abnormal signal.

▶ Go to "Terminal & Connector Inspection" procedure.

Terminal and Connector Inspection

Many malfunctions in the electrical system are caused by poor harness and terminals.

Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.

Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.

Has a problem been found?

	▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.
	▶ Go to "Starter Relay circuit inspection" procedure.

Control Circuit Inspection

■ Check Short in control circuit

IG KEY "OFF".

Disconnect Starter Relay.

IG KEY "ON"

Measure the voltage between control terminal of Starter Relay harness connector and chassis ground.

Specification : Approx 4.3V

Is the measured voltage within specification ?

	▶ Go to " Output Power Circuit Inspection" procedure.
	▶ Repair Short to ground in control circuit, and go to "Verification of vehicle Repair" procedure.

Output Power Circuit Insepection

■ Check Open in power circuit

IG KEY "OFF".

Disconnect Starter Relay.

Measure the resistance between power supply to starter relay and Starter motor ST terminal.

Specification : below 1Ω

Is the measured resistance within specification ?

	▶ Go to "Component inspection" procedure.
	▶ Repair Open or Short to ground in control circuit, and go to "Verification of vehicle Repair" procedure.

Component Inspection

■ Starter Relay check

IG KEY "OFF".

Disconnect Starter Relay.

Measure the resistance between power from battery terminal and power to Starter Relay terminal of Starter Relay (component side).

Measure the resistance between Power from main relay terminal and control terminal of Starter Relay (component side).

Specification :

Terminal	Power Approval
1~2	NO
3~4	YES (약 70Ω ~ 120Ω)

Is the measured resistance within specification ?

	▶ Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage. So, check poor connections and the related circuit between ECM and component thoroughly. Repair as necessary and go to "Verification of Vehicle Repair" procedure.
	▶ Substitute with a known - good Starter Relayand check for proper operation. If the problem is corrected, replace Starter Relay and go to "Verification of Vehicle Repair" procedure.

Verification of Vehicle Repair

After a repair, it is essential to verifying that the fault has been corrected.

Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.

Using GDS, Clear DTC.

Operate the vehicle within DTC Enable conditions in General information.

Are any DTCs present ?

	▶ Go to the applicable troubleshooting procedure.
	▶ System is performing to specification at this time.