Ignition Timing Inspection

Perform "Engine Tune-up Preparation". See ENGINE TUNE-UP PREPARATION .
Verify that the RPM PID is within the specification.
- If not as specified, adjust the idle speed. See IDLE SPEED ADJUSTMENT .
Specification

650-750 (700+/-50) RPM
Connect the timing light to the high-tension lead of the No.1 cylinder.
Verify that the timing mark (Yellow) on the crankshaft pulley is within the specification.
- If not as specified, inspect following.
  - CMP sensor
  - CKP sensor
  - TP sensor
  - ECT sensor
  - Neutral switch (MTX)
  - Clutch switch (MTX)
  - TR switch (ATX)
- If the devices are normal, replace the PCM. See POWERTRAIN CONTROL MODULE under COMPUTERIZED ENGINE CONTROLS in REMOVAL, OVERHAUL & INSTALLATION article.
Ignition Timing

BTDC 9°-11° (10°+/-1°) (TIMING MARK [YELLOW])
Connect the SST (System Selector) to the DLC.

Fig 1: Connecting System Selector
Courtesy of MAZDA MOTORS CORP.
Set switch "A" to position 1.
Set the test switch to SELF TEST.
Verify that the timing mark (Yellow) on the crankshaft pulley is within specification.
- If not as specified, inspect the following.
  - CMP sensor
  - CKP sensor
  - TP sensor
  - ECT sensor
  - Neutral switch (MTX)
  - Clutch switch (MTX)
  - TR switch (ATX)
- If the devices are normal, replace the PCM. See POWERTRAIN CONTROL MODULE under COMPUTERIZED ENGINE CONTROLS in REMOVAL, OVERHAUL & INSTALLATION article.
Specification

BTDC 6°-18°

Fig 2: Checking Timing
Courtesy of MAZDA MOTORS CORP.