DTC B113C
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 B113C Security Indicator Control For symptom byte information, refer to Symptom Byte List. Diagnostic Fault Information
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performanc |
|---|---|---|---|---|
| Control | 2 | 2 | 1 | — |
| Low Reference | — | 2 | — | — |
| 1. Security LED always ON 2. Security LED inoperative |
Circuit/System Description The security LED is controlled by the body control module (BCM) based on commands from the content theft deterrent system. The security LED is located in the door panel as part of the handle pocket and is supplied ground at all times. When the content theft deterrent system requests the LED be illuminated, the BCM applies voltage to the control circuit, illuminating the LED. Reference Information Schematic Reference Theft Deterrent System Schematics Connector End View Reference Master Electrical Component List Description and Operation Theft Systems 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
- Arm the content theft deterrent system.
- Verify the security LED illuminates or flashes during the arming sequence. ⇒ If the security LED does not illuminate or flash Refer to Circuit/System Testing. ⇓ If the security LED illuminates or flashes
- All OK. Circuit/System Testing
- Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the P18 Door Lock Status Indicator. It may take up to 2 min for all vehicle systems to power down.
- Test for less than 30 Ω between the low reference circuit terminal 30 and ground. ⇒ If 30 Ω or greater 2.1. Ignition OFF, disconnect the harness connector at the K9 Body Control Module. 2.2. 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 less than 10 Ω
- Ignition ON, connect a test lamp between the control circuit terminal 12 and ground.
- Verify the test lamp turns ON and OFF when commanding the Security Indicator On and Off with a scan tool. ⇒ If the test lamp is always OFF 4.1. Ignition OFF, disconnect the harness connector at the K9 Body Control Module. 4.2. Test for infinite resistance between the control circuit and ground. ⇒ If less than infinite resistance, repair the short to ground on the circuit. ⇓ If infinite resistance 4.3. Test for less than 2 Ω in the control 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 the test lamp is always ON 4.1. Ignition OFF, disconnect the harness connector at the K9 Body Control Module, ignition ON. 4.2. Test for less than 1 V between the control 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 the test lamp turns ON and OFF
- Test or replace the P18 Door Lock Status Indicator. Repair Instructions Perform the Diagnostic Repair Verification after completing the repair. Door Lock Status Indicator Replacement Control Module References for module replacement, programming, and setup.