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2007
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Impala LTZ
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls And Fuel - 3.9L - DTC P0420 To DTC P3433
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DTC P1682
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Typical Scan Tool Data
Typical Scan Tool Data
EC Ignition Relay Feedback
Circuit
Short to Ground
Open
Short to Voltage
Operating Conditions:
Ignition ON Engine OFF. Powertrain Relay commanded ON
Ignition 1 voltage
0 volts
0 volts
12 volts
Ignition 1 Signal
Circuit
Short to Ground
Open
Short to Voltage
Operating Conditions:
Ignition ON Engine OFF. Ignition Main PCB Relay commanded ON
Ignition 1 voltage
0 volts
0 volts
12 volts