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Tahoe / Yukon Service Manual

DTC B1513

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 Passive Entry Right Front Door Antenna Signal High For symptom byte information, refer to Symptom Byte List. Diagnostic Fault Information

Circuit Number Circuit Short to Ground Open/Hi Resistan Short gh to ceVoltage Signal Performa
4303 Passive Entry Right Front Door Antenna Signal – High Reference B1513 11 B1513 13 B1513 12 —
4304 Passive Entry Right Front Door Antenna Signal – Low Reference B1513 11 B1513 13 B1513 12 —

Circuit/System Description The right body antenna is located on the passenger side of the vehicle and is used to establish low frequency communications with the keyless entry transmitter. As a vehicle with locked doors is approached with a keyless entry transmitter and the exterior door handle button or door handle touch pad is pressed, the body control module communicates with the right body antenna. Diagnostic Aids The antenna must be installed correctly for proper performance. The precise location and orientation are important for the antenna to have the range and shape of range designed for each antenna location. There is a possibility that the passive entry system set a false DTC due to the antenna being incorrectly installed. Conditions for Running the DTC The right exterior door handle button/door handle touch pad is pressed or all the doors are closed. Conditions for Setting the DTC B1513 11 The body control module detects a short to ground on the passive entry right front door keyless entry antenna signal circuit three or more times. B1513 12 The body control module detects a short to voltage on the passive entry right front door keyless entry antenna signal circuit three or more times. B1513 13 The body control module detects an open on the passive entry right front door keyless entry antenna circuit three or more times. Action Taken When the DTC Sets Right door will not open when the right door handle button/door touch pad is pressed if the vehicle is locked. Reduced or no coverage of the keyless entry transmitter outside the vehicle when the right door handle button/touch pad is pressed. The service keyless start system message will display in the DIC. Conditions for Clearing the DTC A current DTC will clear when the conditions for setting the DTC are no longer present. A history DTC will clear after 50 malfunction-free ignition cycles. Reference Information Schematic Reference Remote Function Schematics Connector End View Reference Master Electrical Component List Description and Operation Keyless Entry System Description and Operation 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 ON.
  2. Verify DTC B1444, B1446, or B1451 is not set. ⇒ If any of the DTCs are set Refer to Diagnostic Trouble Code (DTC) List - Vehicle. ⇓ If none of the DTCs are set
  3. Refer to Circuit/System Testing. Circuit/System Testing
  4. Ignition OFF, disconnect the harness connector at the T10R Low Frequency Body Side Antenna — Right, ignition ON.
  5. Test for less than 1 V between the signal circuit terminal 1 and ground. ⇒ If 1 V or greater 2.1. Ignition OFF, disconnect the harness connector at the K9 Body Control Module, ignition ON. 2.2. Test for less than 1 V between the signal circuit and ground. ⇒ If 1 V or greater, repair the short to voltage on the circuit. ⇒ If less than 1 V, replace the K9 Body Control Module. ⇓ If less than 1 V
  1. Ignition OFF, install a DMM between the signal circuit terminal 1 and ground. Set the DMM to capture DC voltage using the MIN MAX function. Turn off autorange and manually set the DMM range to 000.0 V.
  2. Lock the vehicle doors using the keyless entry transmitter. Activate the antenna by pressing the exterior door handle button/touch pad.
  3. Verify the MAX voltage captured by the DMM is greater than 1 V. ⇒ If 1 V or less 5.1. Ignition OFF, disconnect the harness connector at the K9 Body Control Module. 5.2. Test for infinite resistance between the signal circuit and ground. ⇒ If less than infinite resistance, repair the short to ground on the circuit. ⇓ If infinite resistance 5.3. Test for less than 2 Ω in the signal circuit end to end. ⇒ If 2 Ω or greater, repair the open/high resistance in the circuit. ⇒ If less than 2 Ω, replace the K9 Body Control Module. ⇓ If greater than 1 V
  4. Test for less than 1 V between the low reference circuit terminal 2 and ground. ⇒ If 1 V or greater 6.1. Ignition OFF, disconnect the harness connector at the K9 Body Control Module, ignition ON. 6.2. Test for less than 1 V between the low reference circuit and ground. ⇒ If 1 V or greater, repair the short to voltage on the circuit. ⇒ If less than 1 V, replace the K9 Body Control Module. ⇓ If less than 1 V
  1. Install a DMM between the signal circuit terminal 1 and the low reference circuit terminal 2. Set the DMM to capture DC voltage using the MIN MAX function. Turn off autorange and manually set the DMM range to 000.0 V.
  2. Lock the vehicle doors using the keyless entry transmitter. Activate the antenna by pressing the exterior door handle button/touch pad.
  3. Verify the MAX voltage captured by the DMM is greater than 1 V. ⇒ If 1 V or less 9.1. Ignition OFF, disconnect the harness connector at the K9 Body Control Module. 9.2. Test for infinite resistance between the low reference circuit and ground. ⇒ If less than infinite resistance, repair the short to ground on the circuit. ⇓ If infinite resistance 9.3. Test for less than 2 Ω in the low reference circuit end to end. ⇒ If 2 Ω or greater, repair the open/high resistance in the circuit. ⇒ If less than 2 Ω, replace the K9 Body Control Module. ⇓ If greater than 1 V
  4. Replace the T10R Low Frequency Body Side Antenna — Right,.
  5. Lock the vehicle doors using the keyless entry transmitter. Activate the antenna by pressing the exterior door handle button/touch pad minimum of three times to meet the conditions for setting the DTC.
  6. Verify DTC B1513 is not set. ⇒ If DTC B1513 is set Replace the K9 Body Control Module. ⇓ If DTC B1513 is not set
  7. All OK. Repair Instructions Perform the Diagnostic Repair Verification after completing the repair. Low Frequency Body Side Antenna Replacement Control Module References for keyless entry control module replacement, programming, and setup