Mazda CX-9 Grand Touring 2009 Manual page 502

Inspection method for switch connectors or wires
1. Connect the M-MDS to DLC-2.
2. Turn the ignition switch to the ON position (engine off).
NOTE:
3. Access PIDs for the switch you are inspecting.
4. Turn the 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 for poor connection.
Fig. 2: Identifying DLC-2 Connector
Courtesy of MAZDA MOTORS CORP.
Inspection method for sensor connectors or wires
1. Connect the M-MDS to the DLC-2.
2. Turn the ignition switch to the ON position (engine off).
2008 Mazda CX-9 Grand Touring
2008 BRAKES Symptom Troubleshooting (DSC/RSC) - Mazda CX-9
Wires laying across brackets or moving parts.
Wires routed too close to hot parts.
An improperly routed, improperly clamped, or loose harness can
cause wiring to become pinched between parts.
The connector joints, points of vibration, and places where wiring
harnesses pass through the firewall, body and other panels are the
major areas to be inspected.
If the engine starts and runs, perform the following steps at idle.