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| • | 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. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Battery Saver Relay - Control Circuit | B147E 02 | -- | -- | -- |
The battery saver mode reduces the parasitic load of some modules during overseas shipment or during vehicle storage conditions. This improves the drain time on the battery (up to 70 days without the battery going dead). When the vehicle is in transport/storage, some features may have reduced functionality while in the battery saver mode, such as disabling the Remote Function Actuator or content theft features.
The battery saver mode incorporates a latching relay that when enabled disconnects some modules from their ignition power or memory power sources. Battery saver mode is initiated by turning on the hazard flashers, starting the vehicle, and then turning the ignition key into the crank position or pushing the push button start switch (if equipped) for greater than 15 seconds. The mode is disengaged by repeating the previous process causing the relay to latch in the other direction. Once the vehicle is running and the hazard flashers are on, turning the ignition key into the crank position or pushing the push button start switch (if equipped) for greater than 15 seconds will latch the relay in the other direction. This feature can be used as many times as necessary if the vehicle is to be stored for an extended period of time.
| • | The system voltage is between 9–16 V. |
| • | The DTC can only run when the output is activated. |
The BCM detects a short to ground in the battery saver relay set circuit.
The module output driver will be shut down and not supply voltage to the battery saver relay set circuit.
| • | The current DTC will clear when the module request for the output is removed or the malfunction is no longer present. |
| • | A history DTC clears when the module ignition cycle counter reaches the reset threshold of 50, without a repeat of the malfunction. |
Power Mode Description and Operation
Control Module References for scan tool information
| ⇒ | If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM. |
| ⇒ | If the test lamp is always OFF, test the control circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the K9 BCM. |
Perform the Diagnostic Repair Verification after completing the repair.
| • | Relay Replacement : Within an Electrical Center → Attached to Wire Harness |
| • | Control Module References for BCM replacement, setup, and programming |
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