FAQ
TL;DR: Owners report "0.35A quiescent current is present"—a clear parasitic draw that drains batteries. Start by checking radio/Bluetooth and pulling fuses methodically. [Elektroda, MarianAgatka, post #17757782]
Why it matters:** This FAQ helps Mitsubishi Outlander II owners diagnose battery drain fast, identify culprit fuses/modules, and pick effective fixes.
Quick Facts
- Fuse 8 (7.5A) feeds ETACS, WCM, A/C, cluster; post‑2009 adds lighting control and alarm circuits. [Elektroda, moto-kord, post #16695747]
- Audio power paths: F7 and F16 (cabin) plus F31 (engine bay). [Elektroda, ptr92, post #19077536]
- Faulty Bluetooth module 8785A010 under the radio caused 0.35A draw; unplugging cut it to ~0.03A. [Elektroda, MarianAgatka, post #17759910]
- Pulling cabin fuse F7 eliminated the draw for some users, indicating radio/MMCS involvement. [Elektroda, wicio911, post #17758385]
- Edge case: a failed LED interior bulb on fuse 9 kept the circuit awake and drained the battery. [Elektroda, dmb5, post #20041314]
What does fuse No. 8 (7.5A) in the Mitsubishi Outlander II control?
Fuse 8 supplies the A/C control, steering column switches, instrument cluster, ETACS, key buzzer, keyless entry, power window relay, WCM; after 2009 it also feeds lighting control, alarm sensor, and siren. [Elektroda, moto-kord, post #16695747]
How do I quickly check for a parasitic drain on my Outlander?
Put an ammeter in series with the battery, note the resting current, then pull fuses one by one to see when the draw drops. Users isolated a 0.35A draw this way and traced it to the radio circuit. [Elektroda, MarianAgatka, post #17757782]
Which fuses power the radio/MMCS system?
Owners identified F7 and F16 in the cabin fuse box and F31 under the hood as audio power feeds. Pulling these helps confirm radio-related draws. [Elektroda, ptr92, post #19077536]
My draw disappears when I pull F7—what does that indicate?
That points to a load on the radio/MMCS circuit. Several users saw zero power consumption with F7 removed, confirming the audio path as the culprit. [Elektroda, wicio911, post #17758385]
Can the Bluetooth module cause battery drain?
Yes. A failed Bluetooth module (8785A010) under the radio held the circuit awake, causing a 0.35A draw; unplugging dropped it to ~0.03A. “Problem solved.” [Elektroda, MarianAgatka, post #17759910]
Where is the Outlander Bluetooth module and what is its part number?
It sits beneath the radio stack. One confirmed module causing drain carried part number 8785A010. Disconnecting its plug eliminated the excessive draw. [Elektroda, MarianAgatka, post #17759910]
Could interior lighting or LED bulbs trigger a drain?
Yes. A failed LED on the interior lighting circuit (fuse 9, 7.5A) prevented sleep. Removing the bad bulb restored normal current after ~30–60 seconds. [Elektroda, dmb5, post #20041314]
What is ETACS and how does it relate to battery drain?
ETACS is the Electrical Timing and Alarm Control unit. One user cited ETACS reprogramming or replacement as a fix for power consumption and unintended light activation. [Elektroda, Ireneo, post #16695969]
Did Outlander models after 2009 change what’s on fuse 8?
Yes. Post‑2009, fuse 8 also supplies lighting control, alarm sensor, and the alarm siren, expanding potential drain sources on that fuse. [Elektroda, moto-kord, post #16695747]
Why does my alarm randomly trigger while the battery drains?
If fuse 8 feeds your alarm sensor and siren (post‑2009), a fault on that circuit can cause false alarms and parasitic draw. Check loads on fuse 8. [Elektroda, moto-kord, post #16695747]
What resting current have owners measured before and after fixes?
One report showed 0.35A before repair. After unplugging a faulty Bluetooth module, resting current dropped to about 0.03A. [Elektroda, MarianAgatka, post #17759910]
Should I start my diagnosis at the radio/MMCS?
Yes. Multiple owners confirmed battery drain linked to the radio path. “It is best to start checking from the radio.” [Elektroda, pin987, post #19774136]
What is the WCM mentioned on the fuse list?
WCM stands for Wireless Control Module. It manages keyless and immobilizer functions and is listed among fuse 8 consumers. [Elektroda, moto-kord, post #16695747]
How do I isolate a radio-related battery drain (3-step)?
- Insert an ammeter in series with the battery and note the draw.
- Pull F7 (cabin); if the draw drops, note it.
- Continue with related audio fuses to pinpoint the device, then test the Bluetooth module. [Elektroda, MarianAgatka, post #17757782]
Can dealership visits miss this issue?
Yes. One owner reported prior dealer attention without resolution; community tracing later pointed to specific fuse/module faults. [Elektroda, decybel91, post #16696642]
Is there a link between ETACS faults and lights turning on by themselves?
A member noted ETACS exchange or reprogramming as the reason for battery consumption and occasional automatic light activation. [Elektroda, Ireneo, post #16695969]
