Using A Speedometer Tester

WARNING: This page is about a different car, the 2018 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

Adjust the tire pressure to the specification.

Using a speedometer tester, verify that the tester reading is as indicated in the following table.

Type A

SPEEDOMETER TESTER INDICATION (km/h)	ALLOWABLE RANGE (km/h)
20	19.00-21.00
40	39.00-41.00
60	59.00-61.00
80	79.00-81.00
100	99.00-101.00
120	119.00-121.00
140	139.00-141.00
160	159.00-161.00
180	179.00-181.00
200	199.00-201.00
220	219.00-221.00
240	239.00-241.00
10	9.00-11.00
20	19.00-21.00
30	29.00-31.00
40	39.00-41.00
50	49.00-51.00
60	59.00-61.00
70	69.00-71.00
80	79.00-81.00
90	89.00-91.00
100	99.00-101.00
110	109.00-111.00
120	119.00-121.00
130	129.00-131.00
140	139.00-141.00
150	149.00-151.00

Type B

SPEEDOMETER TESTER INDICATION (km/h)	ALLOWABLE RANGE (km/h)
20	18.00-22.00
40	38.00-42.00
60	57.75-62.25
80	77.50-82.50
100	97.25-102.75
120	117.00-123.00
140	136.75-143.25
160	156.50-163.50
180	176.50-183.50
200	196.25-203.75
220	216.00-224.00
240	236.00-244.00
10	8.75-11.25
20	18.75-21.25
30	28.75-31.25
40	38.50-41.50
50	48.50-51.50
60	58.25-61.75
70	68.00-72.00
80	77.75-82.25
90	87.75-92.25
100	99.75-102.25
110	107.75-112.25
120	117.75-122.25
130	127.50-132.50
140	137.50-142.50
150	147.50-152.50

Type C

SPEEDOMETER TESTER INDICATION (km/h)	ALLOWABLE RANGE (km/h)
20	17.57-22.43
40	37.67-42.33
60	57.57-62.43
80	77.47-82.53
100	97.12-102.88
120	116.66-123.34
140	136.26-143.74
160	156.26-163.74
180	176.26-183.74
200	196.13-203.87
220	215.82-224.18
240	235.82-244.18
10	8.50-11.50
20	18.55-21.45
30	28.50-31.50
40	38.45-41.55
50	48.36-51.64
60	58.16-61.84
70	67.92-72.08
80	77.74-82.26
90	87.68-92.32
100	97.68-102.32
110	107.68-112.32
120	117.58-122.42
130	127.40-132.60
140	137.40-142.60
150	147.40-152.60

Verify that the speedometer reading is within the range indicated in the table.
- If the speedometer does not operate or the indication is not within the allowable range, inspect the DTC inspection for the following control module and the related wiring harnesses.
  - PCM
  - TCM (ATX)
  - DSC HU/CM
- If the PCM, TCM (ATX), DSC HU/CM, and related wiring harnesses are normal, replace the instrument cluster.