Operation CHARM: Car repair manuals for everyone.
Home >> Volvo >> 2003 >> S40 L4-1.9L Turbo VIN 29 B4204T3 >> Repair and Diagnosis >> Specifications >> Electrical Specifications >> Antilock Brakes / Traction Control Systems
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)

Or, hide this message: temporarily or permanently

Antilock Brakes / Traction Control Systems



Signal Specification ABS
All the values given below are between the terminal stated in column 1 and terminal 16 (ground). This applies unless otherwise indicated in brackets. ABS control module terminals 1-40 correspond to terminals 1-40 on the breakout box.

CAUTION: Before taking readings: Connect the breakout box. Check the ground terminals.

U - DC voltage in volts (V)
%duty - Duty cycle (pulse ratio) as a percentage (%)
Ubat - battery voltage in volts (V)
f - frequency in Hertz (Hz)
Ulow - voltage approximately 0 V
UAC - AC voltage in volts (V)














pro multis · About Operation CHARM