Code
C1261
MITSUBISHI
C — Chassis
RL outlet valve
Views:
UK: 5
EN: 19
RU: 12
AI status
Completed
Completed
100%
Causes
- Open or short in the RL outlet valve wiring or connector
- Corroded, loose, or damaged connector at the valve or ABS actuator
- Failed RL outlet (solenoid) valve inside the hydraulic modulator
- Faulty ABS hydraulic unit or actuator assembly
- Insufficient or contaminated brake fluid affecting valve operation
- Poor power supply or ground to the ABS module
Symptoms
- ABS warning light illuminated
- Brake (and/or traction/stability) warning lamp may also come on
- ABS may not modulate brake pressure at the affected wheel; possible reduced ABS function
- Brake pedal firmness may change during ABS events
- Possible ABS activation or unexpected pulsation during normal braking
- Longer stopping distance or reduced stability under braking in slippery conditions
What to check
- Read and record trouble codes and freeze-frame data with a proper scan tool
- Visual inspection of the RL outlet valve connector and wiring for corrosion, damage, or water ingress
- Check brake fluid level and condition
- Verify ABS system fuses and battery/ignition supply to ABS ECU
- Back-probe the valve connector while commanding the valve with a scan tool and observe voltage/ground
- Measure RL outlet valve coil resistance (compare to service spec)
Signal parameters
- Coil resistance (solenoid): typically low ohms; consult vehicle service manual for exact specification (example range often ~5–30 Ω)
- Supply command voltage: near battery voltage (~11–14 V) when valve is being driven (varies by control strategy)
- Ground return: low-resistance path to ABS ECU ground
- Activation signal: pulsed/duty-cycle control during ABS operation — frequency and duty vary with ECU commands
- No open-circuit or short to ground/power on the valve coil circuit when idle
Diagnostic algorithm
- Connect a capable scan tool, read and record all ABS-related codes and freeze-frame data. Note whether code is current or historic.
- Visually inspect the RL outlet valve connector and wiring harness for damage, corrosion, pins pushed back, or signs of water ingress. Repair as needed.
- Check vehicle battery voltage and ABS fuse/power feeds to ensure proper supply to the ABS ECU.
- With ignition ON (engine off) and using a multimeter, measure coil resistance at the RL valve connector; compare to factory spec. Replace valve if outside specification.
- Back-probe the valve connector while commanding the valve with the scan tool (if supported). Verify the ECU provides the expected drive voltage/pulse and a good ground return.
- Perform continuity test between the valve connector pins and the ABS ECU pins to confirm no open circuit or short to chassis. Repair wiring as required.
- If wiring and connector are good but valve does not respond to commanded activation, consider hydraulic modulator internal failure — bench/test or replace hydraulic unit/solenoid assembly per service manual.
- If suspect ECU output fault after wiring and valve are proven good, inspect ECU grounds and power. Consider testing or replacing ABS/control module per manufacturer procedures.
- After repairs, clear codes, perform active tests and a road test with ABS activation conditions to confirm repair and ensure no reoccurrence.
Likely causes
- Damaged wiring harness or connector at RL outlet valve (most common)
- Stuck or electrically failed RL outlet valve due to contamination or wear
- Open/short in control/ground circuit between ABS ECU and valve
- Fault in ABS hydraulic unit requiring replacement
- Intermittent battery/ignition voltage to ABS system
Fault status
Status
ABS control unit detected fault in Rear-Left (RL) outlet valve circuit — check RL outlet valve, wiring, connectors, and ABS hydraulic unit.
Repair difficulty: Medium
Diagnostic time: 1.0-2.5 hours
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