C720B (C4751i)

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ByEric Ditges
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Contents

Trouble typeC720B: 1st transfer pressure clutch failure
RankC
Trouble detection conditionAfter starting the clutch, an error is detected for the malfunction detection signal.
Trouble isolation–
Relevant electrical parts1st transfer pressure clutch (CL1)Base board (BASEB)

Procedure

  1. Check the connector between CL1-relay CN13-BASEB CN18E for proper connection and correct as necessary.
  2. Check the connector of CL1 for proper drive coupling and correct as necessary.
  3. CL1 conduction check
    • Control signal: BASEB CN18E-3 (ON)
    • Location of electrical component: 2-C
  4. Replace the main drive unit.
  5. Replace BASEB.

(Link to the Field Service Manual)