Pinpoint Test G

G: C1286-Booster mechanical failure

G1: CHECK THE BRAKE BOOSTER VACUUM PIPE
1. Switch the ignition to the RUN position.
2. Check the vacuum pipe to the brake booster.
^ Is the vacuum pipe broken or disconnected?
-> Yes
INSTALL a new vacuum pipe. CLEAR DTC. TEST the system for normal operation.
-> No
Go to [G2]

G2: CHECK THE BRAKE BOOSTER SOLENOID
1. Switch the ignition to the OFF position.
2. Disconnect the brake booster electrical connector, FH56.
3. Measure the resistance between pins 3 (brown/red) and 4 (white/red) of the brake booster solenoid.
^ Is the resistance between 1 and 2 ohms?
-> Yes
Go to [G3]
-> No
INSTALL a new brake booster. CLEAR DTC. TEST the system for normal operation.

G3: CHECK THE CONTINUITY OF THE BRAKE BOOSTER SOLENOID CIRCUIT
1. Disconnect the DSC control module electrical connector, FH103.
2. Measure the resistance between the brake booster solenoid electrical connector and the ABS/DSC control module electrical connector:
^ FH56 pin 4, (white/red) and FH103 pin 17, (white/red)
^ FH56 pin 3, (brown/red) and FH103 pin 31, (brown/red)
^ Is the resistance less than 0.5 ohms?
-> Yes
Go to [G4]
-> No
REPAIR the necessary circuit between the brake booster solenoid electrical connector pin and the ABS/DSC control module electrical connector pin. CLEAR DTC. TEST the system for normal operation.

G4: CHECK THE BRAKE BOOSTER SOLENOID CIRCUIT FOR SHORT TO GROUND
1. Measure the resistance between the brake booster solenoid electrical connector and the ABS/DSC control module electrical connector:
^ FH56 pin 4, (white/red) and GROUND FH103 pin 47, (brown).
^ .FH56 pin 3, (brown/red) and GROUND FH103 pin 47, (brown).
^ Is the resistance less than 0.5 ohms?
-> Yes
REPAIR the necessary circuit between the brake booster solenoid electrical connector pin and the ABS/DSC control module electrical connector pin. CLEAR DTC. TEST the system for normal operation.
-> No
INSTALL a new ABS/DSC control module. CLEAR DTC. TEST the system for normal operation.