Battery Electrical Drain
This vehicle is equipped with a battery rundown protection feature. Check the electrical system for an excessive electrical drain if either of the following conditions occur:
| • | The battery is low or dead after the vehicle sits overnight. |
| • | The battery runs down over a period of two to three days. This is referred to as a "parasitic current draw". |
Perform the PCM Draw Test as follows:
- Ensure that the battery is fully charged
- Remove the key from the ignition.
- Close all of the doors. Turn the headlights and the parking lights OFF.
- Turn the courtesy lights OFF.
- Connect the negative battery cable.
- Remove voltage from the PCM memory.
- Connect the milliammeter between the terminals.
Important: Perform the battery electrical drain check after making any repairs.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
DEFINITION: PCM Draw Test | ||||
1 | Read the milliammeter. | below 10 milliamps | ||
2 | The PCM is OK. Perform the battery electrical drain check again to recheck the current drain. | -- | -- | -- |
3 | Disconnect the PCM and recheck the current draw as directed above. | over 10 milliamps | ||
4 | The problem is not the PCM. Check the orn wires for a short to ground. Check the components connected to the orn wires. Refer to "Power Distribution" in Electrical Diagnosis. | -- | -- | -- |
5 | A measurement of approximately 0 amps indicates a faulty PCM. | Approximately 0 amps | -- | |
6 | Replace the PCM. | -- | -- | -- |
