Symptom Troubleshooting [Dynamic Stability Control System]: NVH Mazda 3 BL

Vibration method

1. If malfunction occurs or becomes worse while driving on a rough road or when engine is vibrating, perform the steps below. NOTE: There are several reasons why vehicle or engine vibration could cause an electrical malfunction. Some of the things to inspect are: Connectors not fully seated. Wiring harness not having full play. Wires laying across brackets or moving parts. Wires routed too close to hot parts. An improperly routed, improperly clamped, or loose wiring harness can cause wiring to become pinched between parts. The connector joints, points of vibration, and places where wiring harness pass through the firewall, body panels, etc. are the major areas to be inspected.

Scheme 67

1. Connect the M-MDS to the DLC-2.
2. Turn the ignition switch to the ON position (Engine OFF). NOTE: If engine starts and runs, perform the following steps at idle.
3. Access PIDs for the switch you are inspecting.
4. Turn switch on manually.
5. Slightly shake each connector or wiring harness vertically and horizontally while monitoring the PID. If the PID value is unstable, inspect poor connection.

Scheme 68

1. Connect the M-MDS to the DLC-2.
2. Turn the ignition switch to the ON position (Engine OFF). NOTE: If engine starts and runs, perform the following steps at idle.
3. Access PIDs for the switch you are inspecting.
4. Slightly shake each connector or wiring harness vertically and horizontally while monitoring the PID. If the PID value is unstable, inspect poor connection.