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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1827 (Engine Controls And Fuel - Hybrid (LZ1) - DTC P0351 Through DTC P3449 And Troubleshooting) >> Diagnostic Information and Procedures >> DTC P0685, P0689, P0690, or P1682 >> Diagnostic Fault Information

Diagnostic Fault Information

WARNING: This page is about a different car, the 2011 GMC Yukon, 2011 Chevrolet Tahoe, and 2011 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
Powertrain Relay

Circuit Short to Ground Open/High Resistance Short to Voltage
Relay Coil Supply Voltage P0685 P0685 -
Relay Control Circuit P0685 P0685, P1682 P0685, P0690, P1682
Relay Feedback Circuit - - P0690
Run/Crank Relay

Circuit Short to Ground Open/High Resistance Short to Voltage
Ignition 1 Signal 1 1 2
1. Will cause a No Crank condition.
2. Engine continues to operate with ignition OFF.
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