When the ignition switch is placed in the start position, a discrete signal is supplied to the engine control module (ECM) notifying it that the ignition is in the start position. The ECM then verifies that the transmission is in park or neutral. If it is, then the ECM supplies ground to the control circuit of the STRTR relay. When this occurs, battery voltage is supplied through the switch of the STRTR relay to terminal A (4.2L LL8) or S (5.3L LH6 / 6.0L LS2) of the starter solenoid. The ECM monitors the voltage on the control circuit of the STRTR relay. If the circuit becomes open or shorted, then the ECM will set DTC P0615.

The ECM detects improper voltage on the control circuit of the STRTR relay.

DTC P0615 is a type C DTC.

DTC P0615 is a type C DTC.

Schematic Reference

Starting and Charging Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Starting System Description and Operation

Electrical Information Reference

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

1. Ignition OFF, disconnect the STRTR relay.
2. Transmission in park, verify that a test lamp illuminates between the PNP signal circuit terminal 85 and ground.

⇒	If the test lamp does not illuminate, test the PNP signal circuit for an open/high resistance.

3. Connect a test lamp between the control circuit terminal 86, and the PNP signal circuit terminal 85.
4. Turn the ignition to the start position. The test lamp should turn ON only when the ignition is held in the start position, for no greater than 10 seconds.

⇒	If the test lamp is always ON, test the control circuit for short to voltage. If the circuit tests normal, replace the ECM.

⇒	If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM.

5. If all circuits test normal, test or replace the STRTR relay.

STRTR Relay

1. Ignition OFF, disconnect the STRTR relay.
2. Test for 60-180 ohms between terminals 85 and 86.

⇒	If not within the specified range, replace the relay.

3. Test for infinite resistance between the following terminals:

•

30 and 86

•

30 and 87

•

30 and 85

•

85 and 87

⇒	If not the specified value, replace the relay.

4. Install a 20A fused jumper wire between relay terminal 85 and 12 volts. Install a jumper wire between relay terminal 86 and ground. Test for less than 2.0 ohms between terminals 30 and 87.

⇒	If greater than specified range, replace the relay.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.