Vibe FWD L4-2.4L (2009)
Ignition Relay: Testing and Inspection
Ignition Relay Diagnosis
Diagnostic Instructions
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Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
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Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
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Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure Instructions)
provides an overview of each diagnostic category.
Circuit/System Description
The EFI relay and the ignition 2 relay provide ignition voltage to the control module and other engine control components while the ignition is ON. One
side of the coil of the relay is always grounded. When voltage is applied to the other side of the coil, the relay coil is energized creating a magnetic field
that closes the switch side of the relay. The switch side of the relay receives power from the applicable fuse protected positive voltage circuit.
Both the EFI relay and the ignition 2 relay are an integral part of the multifunction alarm module located in the fuse block - underhood. The circuit
protection fuses for both relays are also a part of the multifunction alarm module.
Diagnostic Aids
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The relay electrical contacts in the multifunction alarm module may be pitted or sticking. Replace the module, if gently tapping or wiggling the
module causes a change in the relay's operation.
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The performance of the multifunction alarm module may be affected by temperature. Check the module operation after sitting outside overnight
and after running the engine for 30 minutes.
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If the EFI fuse opens during cranking, check for a shorted fuel pump/circuit. The EFI relay supplies current to the circuit opening relay that
supplies power to the fuel pump. The circuit opening relay is energized during cranking and when reference pulses are detected by the PCM.
Reference Information
Schematic Reference
Engine Controls Schematics (See: Diagrams/Electrical Diagrams)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Electrical Information Reference
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Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics)
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Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics)
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Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics)
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Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Computers and Control Systems/Testing and Inspection/Diagnostic Trouble Code
Descriptions)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Testing
Warning: Refer to Electric Coolant Fan Warning (See: Engine, Cooling and Exhaust/Cooling System/Service Precautions).
1. Ignition OFF, remove the multifunction alarm module.
2. Ignition OFF, disconnect the X1, X2, and X3 harness connectors at the module.
3. Ignition OFF, test for less than 5 ohm between relay coil ground circuit terminal listed below and ground G104.
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EFI relay terminal X2-3
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IG2 relay terminal X3-3
‹› If greater than the specified range, repair the open/high resistance in the relay coil ground circuit.
