Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Transfer Box Component Layout








Transfer Box Component Layout
1. High/low switch (manual vehicles only)
2. BeCM
3. Selector lever assembly (Automatic transmission vehicles only)
4. EAT ECU (Automatic transmission vehicles only)
5. Transfer box ECU
6. Transfer box
7. Gearbox (Automatic transmission shown)






Transfer box control schematic
1. Automatic transmission and transfer box selector
2. Speed sensor
3. Ratio control motor
4. Transfer Box ECU
5. ECM (NAS vehicles only)
6. EAT ECU (Automatic transmission only)
7. Neutral switch (Manual transmission only)
8. High/Low fascia switch (Manual transmission only)
9. BeCM Fuse 4 Battery supply to Transfer Box ECU and ratio control motor
10. BeCM Fuse 6 Ignition supply to Transfer Box ECU
11. BeCM
12. Diagnostic socket
13. Instrument pack