Double Brake Swtich - Chery QQ6 Service Manual

11.14 Double Brake Switch
Failure codes: P0571, P0504
No.
Put the ignition switch to "ON".
1
2 Pull out brake switch joint on harness, and then
use a multimeter to check if it is short or break
circuit between 1#, 2# pins of this joint and 21#,
58# pins of ECU.
3 Close the ignition switch, and then check if an
around 12V battery voltage is present on 3# pin of
the switch joint.
4 Open the ignition switch, and then check if an
around 12V battery voltage is present on 4# pin of
the switch joint.
5 Release brake pedal, disconnect sensor connector,
and then check if 1# and 3# pins cut off.
6 Release brake pedal, disconnect sensor connector,
and then check if 2# and 3# pins conducts.
7 Apply brake pedal, disconnect sensor connector,
and then check if 1# and 3# pins conducts.
8 Apply brake pedal, disconnect sensor connector,
and then check if 2# and 4# pins cut off.
Operating steps Result Follow up steps
Next step
Yes Next step
No Check the circuit
Yes Next step
No Check the circuit
Yes Next step
No Check the circuit
Yes Next step
No Replace the brake
switch
Yes Next step
No Replace the brake
switch
Yes Next step
No Replace the brake
switch
Yes Check other part
No Replace the brake
switch