B1379

Code

Other B — Body

Oil Change Reset Button Circuit Short To Ground

Brand: Other

Type: B — Body

Views: UK: 31 EN: 39 RU: 26

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Page language: EN

Causes

Damaged or chafed wiring contacting body/chassis ground
Corroded, bent, or damaged connector terminals
Failed oil-change reset switch (internal short)
Connector or harness pin pushed out of housing allowing contact with ground
Water ingress or contamination in switch or connector
Aftermarket accessory or repair that modified the harness and caused a short

Symptoms

Oil change/service interval reset does not work
Service reminder or maintenance indicator remains on after attempted reset
Oil change reset button unresponsive or intermittent
Stored B1379 trouble code in body/control module
Possible erratic behavior of dash indicator or cluster

What to check

Visual inspection of switch, connector, and wiring for damage, corrosion, or water intrusion
Check for related blown fuses or recent wiring repairs/modifications
Backprobe connector with key on to measure voltage at the switch circuit
Measure continuity between switch signal wire and chassis ground with connector disconnected
Wiggle harness while watching signal/continuity to reproduce intermittent shorts
Scan for other related codes that could indicate module or ground issues

Signal parameters

Expected resting voltage on switch signal (key ON): near battery voltage (approximately 10–14 V) if pulled up by module
When switch pressed: signal should switch to ground (0 V) or open depending on design; confirm factory spec
Short to ground condition: continuity to chassis ground with near 0 Ω resistance
Open circuit: very high resistance / infinite between signal wire and ground
Typical continuity check: 10 kΩ indicates open/inoperative

Diagnostic algorithm

Retrieve freeze frame and stored codes; note any related body or network codes.
Perform a visual inspection of the oil-change reset switch, dash area, and wiring harness for physical damage, chafing, or corrosion.
Disconnect the switch connector. With the ignition ON (or per manufacturer procedure), backprobe the module/signal side of the harness to check for voltage. A constant low (near 0 V) indicates a short to ground in the wiring or module.
With ignition OFF and battery disconnected where required for safety, measure continuity between the signal wire and chassis ground. A short (low ohms) confirms wiring short; if open/high resistance, suspect switch or connector.
Inspect and clean connector terminals. Repair or replace any corroded pins or sockets. Re-test after cleaning.
If wiring appears intact, bench-test or temporarily swap the known-good reset switch (if available) to confirm switch operation.
Use a wiring diagram to trace the circuit back to the controlling module. Disconnect intermediate connectors and retest continuity to isolate the short location.
If the short disappears when a connector is disconnected, inspect the section of harness between connectors for chafe or pin contact with metal components.
If wiring checks out and switch is good, suspect module/input failure. Confirm with module-level tests per factory service information before replacing the module.
After repair, clear codes and perform the oil-change reset procedure to verify correct operation and absence of code reappearance.

Likely causes

Wiring short to chassis ground near the switch or connector
Failed/reset switch internally shorted
Corroded/contaminated connector causing ground path

Fault status

⚠️ Status

Oil change reset button circuit shorted to ground. Reset input is held low preventing proper reset; inspect switch, wiring, and connectors for shorts to chassis ground.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2 hours