DTC P0685-00: Main Relay Control Circuit Open
WARNING: This page is about a different variant/trim than selected.
P0685-00: (PCM - VIN Y) DETECTION CONDITION AND POSSIBLE CAUSE
| System malfunction location |
Main relay control circuit open |
| Detection condition |
- The period of time in which the PCM power supply remains on after the ignition is switched off is not within the specified time.
|
| Fail-safe |
|
| Possible cause |
- Main relay malfunction (Refer to RELAY INSPECTION
in the service information.)
- Malfunction in wiring harness (including connector/terminal) between battery and main relay
(see CIRCUIT INSPECTION
.) (see CONNECTOR INSPECTION
.)
- Malfunction in wiring harness (including connector/terminal) between main relay and PCM
(see CIRCUIT INSPECTION
.) (see CONNECTOR INSPECTION
.)
- Malfunction in wiring harness (including connector/terminal) between PCM and body ground
(see CIRCUIT INSPECTION
.) (see CONNECTOR INSPECTION
.)
- PCM malfunction (Refer to applicable PCM REMOVAL/INSTALLATION (VIN Y)
in the service information.)
|
| Repeatability verification procedure |
- Clear the DTC recorded in the memory. (see CLEARING DTC
.)
- Start the engine and warm it up completely.
- Perform the DTC inspection for the PCM. (See DTC INSPECTION
.)
|
 Courtesy of MAZDA MOTORS CORP.
|
| 1 |
Battery |
| 2 |
Main relay |
| 3 |
PCM |