Inspection Procedure 2

INSPECTION PROCEDURE 2: Speedometer does not Work.

Speedometer Circuit <M/T> Part 1:

Speedometer Circuit <M/T> Part 2:

CIRCUIT OPERATION
- The ignition switch (IG1) circuit is the power source for the speedometer and vehicle speed sensor.
- The vehicle speed sensor are installed on the transaxle. Four pulses are generated with one turn of the vehicle speed sensor shaft. these pulse signals are sent into the speedometer. The speedometer calculates the pulse signals to operate the needle of the meter. At the same time, the travel distance is calculated.

TECHNICAL DESCRIPTION (COMMENT)
The cause may be a faulty vehicle speed sensor circuit system or a faulty speedometer. Vehicle speed sensor is also used by the engine control module (ECM) and auto-cruise control-ECU.

TROUBLESHOOTING HINTS
- Malfunction of the vehicle speed sensor
- Malfunction of the combination meter (printed-circuit board or speedometer and tachometer)
- Damaged wiring harness or connectors

DIAGNOSIS

Required Special Tools:
- MB991223: Harness Set
- MB991958: Scan Tool (MUT-III Sub Assembly)
- MB991824: Vehicle Communication Interface (V.C.I.)
- MB991827: MUT-III USB Cable
- MB991911: MUT-III Main Harness B (Vehicles without CAN communication system)

STEP 1. Check with other meter.

Check to see that the tachometer, fuel gauge and water thermometer are operating normally.

Q: Do all other meters operate?

YES : Go to Step 2.

NO : Refer to INSPECTION PROCEDURE 6.

STEP 2. Using scan tool MB991958, read the diagnostic trouble code.

CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to "LOCK" (OFF) position before connecting or disconnecting scan tool.




1. Connect scan tool MB991958 to the data link connector.
2. Turn the ignition switch to the "ON" position.
3. Read the MFI system diagnostic trouble code.

Q:Is DTC P0500 set?

YES: Refer to Multiport Fuel Injection (MFI) Diagnosis <2.0L> or Multiport Fuel Injection (MFI) Diagnosis <2.4L> in Computers and Control Systems.

NO: Go to Step 3.










STEP 3. Check combination meter connector C-01 and vehicle speed sensor connector B-04 for damage.

Q:Are combination meter connector C-01 and vehicle speed sensor connector B-04 in good condition?

YES: Go to Step 4.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. The speedometer should work normally.
















STEP 4. Check the wiring harness between combination meter connector C-01 (terminal 12) and vehicle speed sensor connector B-04 (terminal 3).

NOTE: Also check joint connector (5) C-21 and intermediate connector C-124. If joint connector (5) C-21 or intermediate connectors C-124 is damaged, repair or replace the connector as described in Harness Connector Inspection.

Q:Are the wiring harness between combination meter connector C-01 (terminal 12) and vehicle speed sensor connector B-04 (terminal 3) in good condition?

YES: Replace the combination meter. The speedometer should work normally.

NO: Repair the wiring harness. The speedometer should work normally.