Tachometer Check

Required Special Tools:

MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: Vehicle Communication Interface (V.C.I.)
- MB991827: M.U.T.-III USB Cable
- MB991911: M.U.T.-III Main Harness A (Vehicles with CAN communication system)

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

Connect scan tool MB991958 to the data link connector.
A/T select lever: "P" position.
Turn the ignition switch to "ON" position.
Start the engine.
Run the engine.
Select MFI system data list and take a reading of the engine speed.
Item 22: CKP SENSOR

Compare the engine speed shown in the scan tool with that shown on the tachometer. The engine speeds shown on the tachometer should correspond to the table below.

NOTE: The following standard value assumes that battery voltage is 13.5 volts.

Standard value :

Fig 1: Connecting Scan Tool To Data Link Connector

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

ENGINE SPEED REFERENCE

ENGINE SPEED r/min	TACHOMETER INDICATING TOLERANCE r/min
600	500 - 700
(2, 000)	(1, 900 - 2, 100)
3, 000	2, 850 - 3, 150
(4, 000)	(3, 850 - 4, 150)
5, 000	4, 850 - 5, 150
6, 000	5, 850 - 6, 150

NOTE: The value in parentheses is a reference value.