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Home / DTC / B2423 — 6CD player error

B2423 — 6CD player error

Detailed page for trouble code B2423.

34,405codes
59brands
11,914generic
22,491specific
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Code

B2423

MITSUBISHI B — Body

6CD player error

Brand: MITSUBISHI
Type: B — Body
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Fault stored by audio/head unit or vehicle body ECU due to 6CD changer malfunction
  • Loss of power or ground to the CD changer
  • Damaged or loose wiring/connectors between head unit and CD changer
  • CD changer internal mechanical or optical (laser) failure
  • Communication error on vehicle data bus (CAN, LIN or proprietary audio bus)
  • Blown fuse protecting the audio unit

Symptoms

  • “6CD player error” or similar message shown on head unit display
  • CD changer not recognized by head unit or cannot load/play discs
  • Intermittent loss of CD audio, skipping, or inability to change discs
  • No power to the CD changer (unit dead)
  • Other audio functions may operate normally while CD changer is faulty

What to check

  • Retrieve and record freeze frame and any additional stored DTCs with a diagnostic scanner
  • Visually inspect fuses related to the radio/CD changer and replace if blown
  • Inspect connectors at the head unit and CD changer for corrosion, bent pins or loose fit
  • Check for water intrusion or physical damage to the CD changer unit
  • Verify proper power and ground at the CD changer connector with engine/key on
  • Scan for communication faults on CAN/LIN (look for other modules reporting bus errors)

Signal parameters

  • Battery supply voltage at CD changer: ~12 V (with ignition/accessory on)
  • Ground continuity:
  • Ignition/accessory feed: follows key-on state (~12 V when on)
  • Communication line(s): CAN bus differential present and active ~2.5 V idle, LIN/serial line idle voltage per manufacturer spec
  • Fuse circuit: continuity through radio/CD fuse
  • Optical pickup behavior: audible/mechanical drive sounds when loading (subjective)

Diagnostic algorithm

  1. Connect a scan tool and read all stored and pending codes. Note any related body or audio module codes. Clear codes and attempt to reproduce.
  2. Verify that the radio has correct power and ground. With ignition on, measure battery voltage at the CD changer power pins and check for a good ground reference.
  3. Inspect and secure connectors between head unit and CD changer. Unplug, inspect pins for corrosion or damage, and reconnect firmly.
  4. Check fuses protecting the radio/CD changer and replace if open. Retest after replacing fuse.
  5. Check communication lines: use a scope or scanner to confirm CAN/LIN activity and that the audio module is visible on the bus. Repair wiring if the module is not present or bus errors are seen.
  6. If electrical and communication are good, attempt a soft reset of the head unit per factory procedure. Re-scan for codes.
  7. If error persists and wiring/power/communication are OK, bench-test or remove the CD changer for inspection. Listen for mechanical faults, try loading a disc, and check optical pickup operation.
  8. If internal failure is confirmed, replace the CD changer or head unit as required. Reprogram/reinitialize per manufacturer instructions and clear codes.
  9. After repair, verify operation of the CD changer through multiple disc loads and re-check for absence of stored codes.

Likely causes

  • Failed or intermittent 6-disc CD changer (mechanical jam, failed loader or optical pickup)
  • Loose or corroded multi-pin connector at the CD changer or head unit
  • Blown audio/fuse link in interior fuse box
  • Open or high-resistance ground at the audio unit chassis ground
  • Faulty communication line (CAN/LIN) or short to voltage/ground in audio wiring
  • Head unit software fault requiring reset or reflash

Fault status

⚠️ Status
Control module detected a malfunction with the 6-disc CD player (communication, power or internal fault). The unit may be inoperative or intermittently failing.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B2420 B2421 B2422 B2424 B2425
406

Browse 406 MITSUBISHI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

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