Mazda 3 Service Manual: Instrument Cluster Inspection

Mazda 3 Service Manual / Body / Driver Info & Control / Instrument Cluster Inspection

Speedometer

Using a speedometer tester

CAUTION:

When only the front or the rear wheels are driven using a speedometer tester, the ABS or DSC may determine that the vehicle speed signal is in error and the engine cannot be stopped by the normal operation. If the engine cannot be stopped, perform an emergency engine stop operation..

1. Adjust the tire pressure to the specification.

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

3. Verify that the speedometer reading is within the range indicated in the table.

If the speedometer does not move or the indication is not within the allowable range, inspect the PCM, ABS HU/CM (with ABS) or DSC HU/CM (with DSC), and related wiring harnesses.

If the PCM, ABS HU/CM (with ABS) or DSC HU/CM (with DSC), and related wiring harnesses are normal, replace the instrument cluster.


Speedometer tester indication (km/h)	Allowable range (km/h)	Speedometer tester indication (mph)	Allowable range (mph)
20	17—23	10	9—11
40	36—44	20	18—22
60	54—66	30	27—33
80	72—88	40	36—44
100	90—110	50	45—55
120	108—132	60	54—66
140	126—154	70	63—77

Using the M-MDS

1. Connect the M-MDS (IDS) to the DLC-2.

2. After the vehicle is identified, select the following items from the initialization screen of the IDS.

Select “DataLogger”.
Select “Modules”.
Select “IC”.

3. Verify that it is displayed according to the table using “SPDMTR”.

If the speedometer does not move or the indication is not within the allowable range, inspect the related wiring harnesses.

If the related wiring harnesses are normal, replace the instrument cluster.

M-MDS display	Instrument cluster display
60 km/h	Speedometer gauge needle moves to approx. 60 km/h
120 km/h	Speedometer gauge needle moves to approx. 120 km/h
Off	Speedometer gauge needle moves to 0 km/h

Tachometer

CAUTION:

If the engine speed exceeds the allowable range, the engine could be damaged. Therefore, when inspecting the tachometer, do not allow the engine speed to exceed the allowable range indication on the tachometer.

1. Connect the M-MDS (IDS) to the DLC-2.

2. After the vehicle is identified, select the following items from the initialization screen of the IDS.

Select “DataLogger”.
Select “Modules”.
Select “IC”.

3. Verify that it is displayed according to the table using “TACHOMTR”.

If the tachometer does not move or the indication is not within the allowable range, inspect the related wiring harnesses.

If the related wiring harnesses are normal, replace the instrument cluster.

M-MDS display	Instrument cluster display
3000 RPM	Tachometer gauge needle moves to approx. 3,000 rpm
6000 RPM	Tachometer gauge needle moves to approx. 6,000 rpm
Off	Tachometer gauge needle moves to 0 rpm

Fuel gauge

1. Connect the M-MDS (IDS) to the DLC-2.

2. After the vehicle is identified, select the following items from the initialization screen of the IDS.

Select “DataLogger”.
Select “Modules”.
Select “IC”.

3. Verify that it is displayed according to the table using “LCD_SEG”.

If any of the segments are not displayed, replace the instrument cluster.

Boost gauge

1. Connect the M-MDS (IDS) to the DLC-2.

2. After the vehicle is identified, select the following items from the initialization screen of the IDS.

Select “DataLogger”.
Select “Modules”.
Select “IC”.

3. Verify that it is displayed according to the table using “LCD_SEG”.

If any of the segments are not displayed, replace the instrument cluster.

Instrument Cluster Disassembly/Assembly

CAUTION: Do not drop the instrument cluster or damage the printed board. This will lead to a system malfunction. 1. Perform the instrument cluster configuration when replacing it.. ...

Instrument Cluster Removal/Installation

CAUTION: When replacing the instrument cluster, the configuration procedure must be performed before removing the instrument cluster. Replacing the instrument cluster without performing ...

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