Retained Accessory Power Malfunction
Wiring Systems and Power Management | Diagnostic Information and Procedures | Document ID: 5494012 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. Diagnostic Fault Information
| Circuit Number | Circuit Function | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performanc |
|---|---|---|---|---|---|
| 4083 | Control | B1AA3 11 | B1AA3 13 | B1AA3 12 | — |
| 1050 | Ground | — | B1AA3 13 B1B12 13 | — | — |
Circuit/System Description The K9 Body Control Module (BCM) controls the KR76 Accessory Time Delay Cutoff Relay by applying voltage to the control circuit 4083 and is grounded by ground circuit 1050. The Relay B+ circuit Terminal 30 by circuit 342, when the relay contact is switched closed by control circuit 4083 the relay control terminal 87 supplies B+ voltage to dedicated fuses and circuit breakers. The control circuit 4083 stays energized for up to 10 min provided the driver door is not open. Diagnostic Aids The last 2 digits of the circuit number are significant in identifying its power and ground functions. – Circuits ending in 42 are primary fused B+ circuits (generally the first fuse in the circuit after the battery) – Circuits ending in 40 are secondary fused circuits (generally fuses in a fuse block after the primary circuit) – Circuits ending in 39 and 41 are ignition voltage circuits. – Circuits ending in 50 are grounds. – Circuits ending in 51 are low reference (ground) circuits. Reference Information Schematic Reference Power Distribution Schematics Power Moding Schematics Connector End View Reference Master Electrical Component List Description and Operation Retained Accessory Power 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
- Ignition ON.
- Verify DTC B1AA3 is not set ⇒ DTC B1AA3 is set Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
- Open the drivers door.
- Verify that the KR76 Accessory Time Delay Cutoff Relay cycles on and off while switching the ignition between ON and OFF by verifying a click is heard and/or felt. ⇒ If a click is not heard and/or felt Refer to: Power Mode Mismatch ⇓ If a click is heard and/or felt
- Refer to: The appropriate diagnosis for your device(s) that is/are inoperative.