B2618
DTC B2618
CIRCUIT DESCRIPTION
The body control module (BCM) controls the instrument panel (I/P) courtesy lamps through the courtesy lamps supply voltage circuit. The BCM grounds the courtesy lamps low control circuit which completes the I/P courtesy lamps ground circuit, and the lights illuminate.
DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC B2618 Courtesy Lamps Supply Voltage Circuit High
CONDITIONS FOR RUNNING THE DTC
The BCM must command the courtesy lamps feature ON.
CONDITIONS FOR SETTING THE DTC
- The BCM detects a high when the output should be low in the courtesy lamps supply voltage circuit.
- The condition above must be present for more than 0.3 seconds.
ACTION TAKEN WHEN THE DTC SETS
The BCM stores DTC B2618 in memory.
CONDITIONS FOR CLEARING THE DTC
- A current DTC B2618 will clear if the short to battery in the courtesy lamps supply voltage circuit is no longer detected by the BCM.
- A history DTC B2618 will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present and no other BCM faults are detected.
DIAGNOSTIC AIDS
- If the DTC B2618 is a history DTC, the fault may be intermittent.
- The following conditions may cause an intermittent malfunction to occur:
- An intermittent short to battery in the courtesy lamps supply voltage circuit
- Either I/P courtesy lamp is intermittently shorted to battery internally.
- The BCM is intermittently shorted to battery internally.
TEST
