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Tahoe / Yukon Service Manual

DTC P17E0 or P17E1

Diagnostic Instructions Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Review Strategy Based Diagnosis for an overview of the diagnostic approach. Diagnostic Procedure Instructions provides an overview of each diagnostic category. DTC Descriptors DTC P17E0 Transmission Range Selector Controls Ignition On/Start Switch Circuit Low Voltage DTC P17E1 Transmission Range Selector Controls Ignition On/Start Switch Circuit High Voltage For symptom byte information refer to Symptom Byte List. Diagnostic Fault Information

Circuit Number Circuit Function Short to Ground Open/High Resistance Short to Voltage Signal Performan
5140 B+ — — — —
639 Ignition P17E0, P17E1 P17E0, P17E1 P17E0, P17E1 —
1050 Ground — P17E0, P17E1 — —

Circuit/System Description The vehicle control modules or sensors monitor the system voltage to verify the system voltage is within the normal operating range. Conditions for Running the DTC The ignition is ON. Conditions for Setting the DTC The control module or sensor detects a system voltage below or above a threshold. Action Taken When the DTC Sets A driver information center message and/or warning indicator may be displayed. The control module may be temporarily disabled. Conditions for Clearing the DTC The system voltage returns to normal operating range. Diagnostic Aids A high or low voltage DTC set or voltage value in multiple modules/sensors indicates a concern in the charging system. A possible cause of this DTC could be overcharging with a battery charger or jump starting. Reference Information Schematic Reference Electronic Transmission Range Selector Schematics Connector End View Reference Master Electrical Component List Description and Operation Electronic Transmission Range Selector Description Electrical Information Reference Circuit Testing Connector Repairs Testing for Intermittent Conditions and Poor Connections Wiring Repairs Scan Tool Reference Control Module References for scan tool information Circuit/System Verification

  1. Ignition OFF, measure and record the battery voltage at the battery terminals.
  2. Verify the battery voltage stabilizes between 12.4 and 12.8 V within a few minutes of turning the ignition OFF. ⇒ If battery voltage is less than 12.4 V or more than 12.8 V Refer to Battery Inspection/Test. ⇓ If battery voltage is between 12.4 and 12.8 V
  3. Engine running, headlights ON, measure and record the battery voltage at the battery terminals.
  4. Verify the voltage is at least 1 V greater than the voltage measured in step 1, but less than 15 V. ⇒ If the voltage is not at least 1 V greater than the voltage measured in step 1 or is greater than 15 V. Refer to Charging System Test. ⇓ If the voltage is at least 1 V greater than the voltage measured in step 1, but less than 15 V.
  5. Verify the appropriate control module battery voltage and ignition voltage parameters are available in the scan tool. ⇒ If parameters are not available in the scan tool Refer to Circuit/System Testing ⇓ If parameters are available in the scan tool
  6. Verify the appropriate control module scan tool battery voltage and ignition voltage parameters are within 1 V of the battery voltage. ⇒ If not within 1 V of the battery voltage Refer to Circuit/System Testing ⇓ If within 1 V of the battery voltage
  7. A fault is not currently present and may be an intermittent condition. Circuit/System Testing
  1. Ignition OFF and all vehicle systems OFF, disconnect the harness connectors at the K212 Gear Shift Control Module. It may take up to 2 min for all vehicle systems to power down.
  2. Verify a test lamp illuminates between ground circuit terminal 20 and B+. ⇒ If the test lamp does not illuminate Repair the open/high resistance on circuit 1050 or the ground connection. ⇓ If the test lamp illuminates
  3. Verify a test lamp illuminates between B+ circuit terminal 9 and ground. ⇒ If the test lamp does not illuminate and the circuit fuse is good 3.1. Test circuit 5140 for an open/high resistance. ⇒ If an open/high resistance is found, repair the fault on the circuit. ⇓ If an open/high resistance is not found. 3.2. Replace the X51R Instrument Panel Wiring Harness Junction Block — Right for an internal fault. ⇒ If the test lamp does not illuminate and the circuit fuse is open 3.1. Test circuit 5140 for a short to ground. ⇒ If a short to ground is found, repair the fault on the circuit. ⇓ If a short to ground is not found. 3.2. Replace K212 Gear Shift Control Module. ⇓ If the test lamp illuminates
  4. Ignition ON.
  5. Verify a test lamp illuminates between ignition circuit terminal 17 and ground. ⇒ If the test lamp does not illuminate and the circuit fuse is good 5.1. Test circuit 639 for an open/high resistance. ⇒ If an open/high resistance is found, repair the fault on the circuit. ⇓ If an open/high resistance is not found. 5.2. Replace the X50A Engine Wiring Harness Junction Block for an internal fault. ⇒ If the test lamp does not illuminate and the circuit fuse is open 5.1. Test circuit 639 for a short to ground. ⇒ If a short to ground is found, repair the fault on the circuit. ⇓ If a short to ground is not found. 5.2. Replace K212 Gear Shift Control Module. ⇓ If the test lamp illuminates
  6. Replace the K212 Gear Shift Control Module. Repair Instructions Perform the Diagnostic Repair Verification after completing the repair. Engine Wiring Harness Junction Block Replacement for the X50A Engine Wiring Harness Junction Block Instrument Panel Wiring Harness Junction Block Replacement for the X51R Instrument Panel Wiring Harness Junction Block — Right Control Module References for K212  Gear Shift Control Module replacement, programming and setup.