B1211

Code

Other B — Body

EIC Switch-2 Assembly Circuit Short To Battery

Brand: Other

Type: B — Body

Views: UK: 54 EN: 49 RU: 41

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Page language: EN

Scan for additional codes and view freeze frame/ignition status
Visual inspection of Switch-2, connector, and wiring for damage, corrosion, or pin intrusion
Verify connector is fully seated and locking tab engaged
Inspect for recent aftermarket taps or repairs near the circuit
Measure voltage at the Switch-2 signal pin with ignition off and on
Disconnect the Switch-2 assembly: observe if code clears or symptoms change

Expected idle/off signal: ~0 V (or low, near ground) when switch is off
Expected active signal: battery voltage (approx. 12–14 V) when switch is commanded on
Short-to-battery condition: signal pin reads steady battery voltage when switch should be off
Continuity: infinite/very high resistance when switch circuit open; near 0 Ω when closed
No more than a few milliamps of leakage current on the signal circuit with switch open

Record freeze frame and any related codes. Note vehicle configuration and applied accessories.
Perform a visual inspection of the switch, connector, and harness routing; look for chafing, pin corrosion, or aftermarket modifications.
With ignition off, disconnect the Switch-2 connector. Measure voltage at the harness side signal pin to see if battery voltage is present with the switch disconnected.
If battery voltage is present with connector disconnected, trace wiring toward the power source. Use back-probing and a meter to find where 12V intrudes (inspect splices, junctions, nearby power feeds).
If no battery voltage with connector disconnected, reconnect and measure voltage at the switch terminal while operating the switch. Compare to expected signal parameters.
If measurements point to the switch assembly (signal only present when assembly connected and not behaving correctly), substitute a known-good switch or bench-test/replace the assembly.
Repair any damaged wiring, replace corroded connectors, and secure harness away from moving parts. Replace blown fuses or correct any improper aftermarket taps.
After repairs, clear codes, cycle ignition and operate switch to verify fault does not return. Perform a parasitic draw test if battery drain was a symptom.
If wiring and switch check good but code persists, consider module input circuit testing or replacement per manufacturer procedures.

Shorted wire between accessory/battery feed and Switch-2 signal wire due to chafing or connector damage
Failed Switch-2 assembly where internal contacts are welded or shorted to battery feed
Corroded connector with conductive corrosion bridging the feed and signal terminals
Recent service or accessory installation that tapped constant power into the wrong terminal