Intermittent Concern Troubleshooting

Intermittent Concern Troubleshooting

Vibration method

- 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.

Inspection method for switch connectors or wiring harnesses

1. Connect the M-MDS to the DLC-2.

2. Switch the ignition to ON (engine off).
NOTE:
- If engine starts and runs, perform the following steps at idle.

3. Access PIDs for the switch you are inspecting. On-Board Diagnosis

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.

Inspection method for sensor connectors or wiring harnesses

1. Connect the M-MDS to the DLC-2.

2. Switch the ignition to ON (engine off).
NOTE:
- If engine starts and runs, perform the following steps at idle.

3. Access PIDs for the switch you are inspecting. On-Board Diagnosis

4. Slightly shake each connector or wiring harness vertically and horizontally while monitoring the PID.






- If the PID value is unstable, inspect poor connection.

Inspection method for sensors

1. Connect the M-MDS to the DLC-2.

2. Switch the ignition to ON (engine off).
NOTE:
- If engine starts and runs, perform the following steps at idle.

3. Access PIDs for the switch you are inspecting. On-Board Diagnosis

4. Vibrate the sensor slightly with your finger.

- If the PID value is unstable or malfunction occurs, inspect the sensor for poor connection and/or poor mounting.

Malfunction data monitor method

1. Perform malfunction reappearance test according to malfunction reappearance mode and malfunction data monitor. The malfunction cause is found in the malfunction data.

Connector terminal inspection method

1. Inspect the connection condition of each female terminal.

2. Insert the male terminal to the female terminal and Inspect the female terminal for looseness.