35A-BRAKE ELECTRIC VACUUM PUMP CHECK

BRAKE ELECTRIC VACUUM PUMP CHECK

Required Special Tools:

MB992744: Vehicle communication interface-Lite (V.C.I.-Lite)
MB992745: V.C.I.-Lite main harness A
MB992747: V.C.I.-Lite USB cable short
MB992748: V.C.I.-Lite USB cable long
MB991958: Scan Tool (M.U.T.-III Sub Assembly)

MB991824: Vehicles Communication Interface (V.C.I.)
MB991827: M.U.T.-III USB Cable
MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)

Before starting this inspection, check the vacuum line (refer to

1. Disconnect the vacuum hose from the brake booster side, then connect a vacuum gauge. Connect another vacuum hose between the vacuum gauge and brake booster.

2. Observe either of the procedures below to check the brake electric vacuum pump. The brake electric vacuum pump is judged as "Good" when the vacuum gauge reading is -80 kPa (-11 psi) or lower.

(1) Not using scan tool (M.U.T.-IIISE)

.....1. Disconnect the connector for brake electric vacuum pump as shown, and supply 12 V of power to the brake electric vacuum pump for 30 seconds.

(2) When using scan tool (M.U.T.-IIISE)

caution

To prevent damage to scan tool (M.U.T.-IIISE), always turn off the power supply mode of the electric motor switch before connecting or disconnecting scan tool (M.U.T.-IIISE).

.....1. Connect scan tool (M.U.T.-IIISE). Refer to "How to connect the Scan Tool (M.U.T.-IIISE)

.....2. Turn the power supply mode of the electric motor switch to ON.

.....3. From the system selection screen of scan tool (M.U.T.-IIISE), select "PHEV".

.....4. From the PHEV screen, select "Special function - Test".

.....5. Select the item No. 3 "Vacuum pump actuate".