Pinpoint Test M: The Tachometer Is Inoperative

WARNING: This page is about a different car, the 2004 Mercury Mountaineer and 2004 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.

M1 CARRY OUT THE TACHOMETER ACTIVE COMMAND USING THE DIAGNOSTIC TOOL
- Connect the diagnostic tool.
- Key in ON position.
- Enter the following diagnostic mode on the diagnostic tool: Instrument Cluster Active Command.
- Select the instrument cluster tachometer active command.
- Trigger the tachometer and scroll in increments of 10%. Monitor the tachometer gauge. The tachometer should increase in increments of approximately 700 rpm for each 10% change.
- Does the tachometer gauge increase within specifications?
Yes

refer to INTRODUCTION - CNG, FLEX-FUEL & GASOLINE to continue diagnosis.

No

GO to M2.
M2 CHECK FOR CORRECT INSTRUMENT CLUSTER OPERATION
- Disconnect all instrument cluster connectors.
- Check for:
  - corrosion
  - pushed-out pins
- Connect all instrument cluster connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes

INSTALL a new instrument cluster. Refer to INSTRUMENT CLUSTER . TEST the system for normal operation.

No

The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.