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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 355 (Engine Controls And Fuel - 2.5L (LCV) - DTC P0351 To DTC P2635 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P0685-P0687, P0689, P0690, or P1682: Engine Controls Ignition Relay/Ignition 1 Switch >> Diagnostic Fault Information

Diagnostic Fault Information

WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
Engine Controls Ignition Relay

Circuit Short to Ground Open/High Resistance Short to Voltage
Relay Coil Supply Voltage P0689, P1682, P16A7, P16AF P0685, P0689, P1682, P16A7, P16AF -
Relay Control Circuit P0686, P0690, P16B3 P0685, P0689, P1682, P16A7, P16AF P0685, P0687, P0689, P1682, P16A7, P16AF
Relay Feedback Circuit P0689, P1682, P16A7, P16AF P0689, P1682, P16A7, P16AF P0690, P16B3
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