P0615
DTC P0615
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions)provides an overview of each diagnostic category.
DTC Descriptor
DTC P0615
- Starter Relay Control Circuit
Diagnostic Fault Information
Typical Scan Tool Data (4.2L LL8 only)
Circuit/System Description
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 X1 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.
Conditions for Running the DTC
* The ignition is ON.
* The system voltage is between 9.5-18 volts.
Conditions for Setting the DTC
The ECM detects that the control circuit of the STRTR relay is open, shorted to ground, or shorted to voltage.
Action Taken When the DTC Sets
DTC P0615 is a type C DTC.
Conditions for Clearing the DTC
DTC P0615 is a type C DTC.
Reference Information
Schematic Reference
Starting and Charging Schematics ([1][2]Electrical Diagrams)
Connector End View Reference
Component Connector End Views (Connector Views)
Description and Operation
Starting System Description and Operation (Description and Operation)
Electrical Information Reference
* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (Powertrain Diagnostic Trouble Code (DTC) Type Definitions)
Scan Tool Reference
Control Module References (Programming and Relearning)for scan tool information
Circuit/System Testing
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 and the PNP supply voltage circuit for an open/high resistance. If the circuits test normal, test or replace the PNP Switch.
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.
Component Testing
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 ohms between terminals 30 and 87.
• If greater than specified range, replace the relay.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Relay Replacement (Attached to Wire Harness) (Relay Replacement (Attached to Wire Harness))Relay Replacement (Within an Electrical Center) (Relay Replacement (Within an Electrical Center))
* Control Module References (Programming and Relearning)for ECM replacement, setup, and programming.