Code
B1205
MITSUBISHI
B — Body
PS.ABG indicator circuit high
Views:
UK: 7
EN: 11
RU: 10
AI status
Completed
Completed
100%
Causes
- Open or short in indicator lamp wiring (short to battery +)
- Faulty indicator bulb or LED in the instrument cluster
- Poor or corroded connector/terminal at the lamp or harness
- Blown or faulty fuse supplying the indicator circuit
- Faulty instrument cluster or body control module driver
- Fault in ABS/PS control module that drives or communicates lamp status
Symptoms
- PS.ABG indicator lamp illuminated continuously or stuck on
- Indicator lamp not operating normally during ignition ON bulb check
- Related steering/ABS warning lamps or messages may be present
- Possible intermittent illumination or flicker of the PS.ABG lamp
What to check
- Read stored DTCs with a compatible scan tool; note freeze frame and related codes
- Visual inspection of fuse(s) for instrument cluster and related circuits
- Inspect instrument cluster area, connectors and wiring for damage or corrosion
- Perform ignition ON bulb/LED check: observe whether lamp lights normally
- Check for aftermarket devices connected to dash harness that may affect circuit
Signal parameters
- Reference battery voltage: ~12–14.5 V with engine running
- Expected indicator circuit voltage during OFF state: near 0 V (low) if driven low-side, or near battery voltage if driven high-side depending on design
- Expected indicator voltage during ON/self-test: toggles between 0 V and battery voltage
- Fault condition definition: circuit voltage higher than expected when lamp should be low (e.g., >2–5 V depending on design)
Diagnostic algorithm
- Connect a scan tool. Confirm B1205 and record any additional codes that may point to power, ground, or communication faults.
- Perform a visual inspection: check fuse(s), instrument cluster connector, wiring harness routing, and any signs of overheating, chafing, or repairs.
- With ignition ON (engine off), observe the PS.ABG lamp operation during the lamp check. Note whether it illuminates, is dim, stays on, or is off.
- Back-probe the indicator control and power pins at the cluster connector. Measure voltage to chassis ground during OFF and ON conditions and compare to signal_params. Check for abnormal high voltage when lamp should be off.
- Inspect and test ground(s) for the cluster and related modules. Repair any high-resistance or corroded grounds.
- Disconnect the instrument cluster (or lamp connector if serviceable) and clear the code. If B1205 goes away with the cluster disconnected, suspect cluster lamp/driver. If the code remains, suspect wiring or other module.
- If a replaceable bulb is used, remove and bench-test/replace the bulb. If LED, consider cluster replacement or repair if driver is faulty.
- If wiring fault is suspected, perform continuity and resistance checks from the cluster to the fuse and to the ABS/PS module (if applicable). Repair shorts or opens and insulate any damaged wiring.
- After repairs, clear DTCs and perform ignition cycles and a road test to verify the lamp behaves correctly and the code does not return.
- If wiring and bulb are good but fault persists, test or replace the instrument cluster or body control module per manufacturer procedures and retest.
Likely causes
- Short to battery voltage on indicator feed or control wire
- Failed lamp (LED/bulb) causing abnormal circuit behavior
- Corroded/loose ground at instrument cluster or chassis ground
- Loose or damaged connector between cluster and harness
- Faulty cluster driver transistor or body ECU output stage
Fault status
Status
B1205 — PS.ABG indicator circuit high: The indicator lamp circuit voltage is higher than expected. Possible causes include wiring short to battery, faulty lamp/LED, poor ground, connector problems, or a defective cluster/body module.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email