B1460
Wiper Washer Pump Motor Relay Coil Circuit Short To Battery
Body Chassis/Safety Washer system relay 🟢 Low — Fix at next service
💬
What This Actually Means
In plain language — no jargon

The wiper washer pump relay coil has a short circuit directly to the battery's positive voltage instead of properly switching on and off. Think of it like a light switch that's stuck in the 'on' position with direct power bypassing the control mechanism.

⚡
Symptoms You May Notice
3 known symptoms for this code
Washer pump runs continuously or unexpectedly even when not activated
Washer pump does not operate at all despite switch activation
Burning smell near the relay or wiper control module
🔬
Embedded Systems Insight
What the ECU/ECM is actually computing

The ECU monitors the voltage and current flowing through the washer pump relay coil circuit. It detects abnormal voltage levels that indicate a short directly to battery positive. When coil voltage exceeds safe operating thresholds or fails to follow normal control patterns, the fault is triggered.

Voltage & Parameter Thresholds

Parameter Normal Range Fault Condition
Relay coil voltage 0V (off) or 12V (on, when commanded) Continuous 12V+ when not commanded, or shorted path detected
Coil circuit resistance 25-100 ohms (coil resistance) Drastically reduced resistance indicating short to battery
🔧
Diagnostic & DIY Fix Guide
Check these in order — from cheapest to most complex
1
Washer pump relay
Locate and replace the relay in the fuse box; it's the most common cause and cheapest fix.
2
Relay socket/connector
Inspect the relay socket for corroded pins or damaged contacts causing the short and replace if necessary.
3
Wiring harness section
Check for pinched, melted, or exposed wiring in the washer pump circuit and repair or replace damaged sections.