MPV & 626

Connect New Generation Star (NGS) scan tool to data link connector 2 located under left side of instrument panel, right of steering column. See Fig 1 . Ensure idle speed is correct. See IDLE SPEED & MIXTURE table.
Connect timing light to engine and check timing. See Fig 3 . See IGNITION TIMING SPECIFICATIONS table. If ignition timing is not within specification, check CMP sensor, CKP sensor, TP sensor, ECT sensor, neutral switch, clutch switch and transmission range switch. See SYSTEM & COMPONENT TESTING - MIATA, MILLENIA, MPV, PROTEGE & 626 article. If all sensors and switches are okay, replace PCM.

IGNITION TIMING SPECIFICATIONS (Degrees BTDC @ RPM)

Application

Man. Trans.

⁽¹⁾ Auto. Trans.

B2500 & B3000

10 @ Idle

B4000

8-10 @ Idle

Miata

9-11@ 800

Millenia

2.3

N/A

6-8 @ 650

2.5

N/A

9-11 @ 650

MPV ⁽²⁾

N/A

4-16 @ Idle

Protege

9-11 @ 750

626

2.0L

6-18 @ 550-850

6-18 @ 500-800

2.5L

4-16 @ 550-750

⁽¹⁾	Place automatic transmission in Park.

⁽²⁾	Connect a jumper wire between terminals TEN and GND of data link connector. See Fig 2 .

Fig 1: Locating Data Link Connector 2 (Typical)

Courtesy of MAZDA MOTORS CORP.

Fig 2: Identifying Data Link Connector 1 Terminals

Courtesy of MAZDA MOTORS CORP.

Fig 3: Locating Ignition Timing Marks (Typical)

Courtesy of MAZDA MOTORS CORP.