Dashbord instrumentation Non functional for Japan imported FB14 Sentra

More than likely a broken wire, corroded connector or a chafed wire.

There could be several reasons why the rev counter of your 1992 Opel Monza is not working. One possible reason is a faulty instrument cluster. The instrument cluster is responsible for displaying various information, including the speed and RPM of the vehicle. If the instrument cluster is faulty, it may not be able to display the RPM accurately or at all. Another possible reason is a faulty RPM sensor. The RPM sensor is responsible for sending signals to the instrument cluster, which then displays the RPM on the rev counter. If the RPM sensor is faulty, it may not be able to send signals to the instrument cluster, resulting in a non-functional rev counter.

To fix the issue, you can start by checking the instrument cluster and RPM sensor for any signs of damage or wear and tear. If there are no visible signs of damage, you can try resetting the instrument cluster by disconnecting the battery for a few minutes and then reconnecting it. This may help reset any electronic glitches that may be causing the issue.

If resetting the instrument cluster does not work, you may need to replace either the instrument cluster or RPM sensor. It is recommended to take your vehicle to a certified mechanic or dealership to diagnose and fix the issue properly.

In summary, a non-functional rev counter in a 1992 Opel Monza could be caused by a faulty instrument cluster or RPM sensor. Resetting the instrument cluster or replacing either component may help fix the issue.

There is no tach - rpm sensor . This information comes from the PCM - engine computer .
Tachometer
The tachometer is a 6,000 rpm tachometer. It has four terminals labeled "B" (12 to 14.5V), "S" (EDIS tach signal in), and two "G" (cylinder selection grounds). The top ground (G) terminal is open on a 4-cylinder engine vehicle, and is grounded on a 6-cylinder engine vehicle.

• The tachometer is inoperative

• Powertrain control module (PCM).
• Circuitry.
• Tachometer.
• Instrument cluster printed circuit.

• Go To Pinpoint Test F .

• Incorrect tachometer indication

• Circuitry.
• Instrument cluster printed circuit.
• Tachometer.

• Go To Pinpoint Test G .

Measure the resistance between the instrument cluster C220c pin 8, circuit 398 (BK/YE), harness side and ground.

• Is the resistance less than 5 ohms?

Yes GO to G2 .

No REPAIR the circuit. TEST the system for normal operation.
Measure the resistance between the tachometer and the instrument cluster printed circuit terminals; refer to the following chart:

Instrument Cluster Printed Circuit Terminal Tachometer Terminal C220a pin 13 C220a pin 15 S C220b pin 2 G C220c pin 8 G (6 CYL.)

• Are the resistances less than 5 ohms?

Yes GO to G3 .

No INSTALL a new instrument cluster printed circuit. REFER to Instrument Cluster Printed Circuit in this section. TEST the system for normal operation. G3 CHECK FOR CLEAN TACH OUT (CTO) CIRCUIT OPEN OR SHORT Check for CTO circuit open or short. Refer to Powertrain Control/Emissions Diagnosis (PC/ED) manual.

• Is the CTO circuit OK?

Yes INSTALL a new tachometer. REFER to Gauges in this section. TEST the system for normal operation.

No GO to G4 .
G4 CHECK FOR CORRECT PCM OPERATION Disconnect all PCM connectors. Check for:

• corrosion
• pushed-out pins

Connect all PCM 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 PCM. REFER to Section 303-14 . CLEAR the DTCs. REPEAT the PCM self-test.

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.
Your best bet mite be to take it to a qualified repair shop.

Speedometer
The instrument cluster receives the vehicle speed sensor (VSS) signal from the PCM through the SCP communication network. The instrument cluster micro-processor monitors the VSS input from the PCM and commands the speedometer with a corresponding movement of the pointer.

Tachometer
The instrument cluster receives the tachometer data from the PCM through the SCP network and commands the tachometer according to the data.

Taking your vehicle to a qualified repair shop that has diagnostic tool to scan the instrument cluster for DTC'S - diagnostic trouble codes an also view sensor input data to the PCM engine computer an the I/C would be your best bet .

my 2003 buick century did that. It was the battery!!

The speedometer is operated differently then the tachometer. Tachometer
The tachometer displays the engine speed in revolutions per minute (RPM). Voltage pulses are taken from the ignition control module (ICM) (Gasoline) or the generator (Diesel) and sent to the tachometer. Solid state circuits convert the pulse frequency in order to move the pointer of the tachometer.

Tachometer Inoperative (Gas)
Step
Action
Value(s)
Yes
No
1
Did you perform the OBD II System Check been performed?
--
Go to Step 2
Go to Powertrain On Board Diagnostic (OBD) System Check (5.0L/5.7L); Powertrain On Board Diagnostic (OBD) System Check (7.4L)
2
Remove the I/P Cluster.
Disconnect the Ignition Coil connector.
Connect a J 39200 DMM (continuity) between I/P Cluster connector cavity 6 and ground.
Is continuity present?
--
Go to Step 3
Go to Step 4
3
Locate and repair the short to ground in CKT 121 (WHT) between the Ignition Coil and the I/P cluster. Refer to Wiring Repairs in Wiring Systems.
Is the repair complete?
--
Refer to Instrument Cluster System Check
--
4
Connect a J 39200 DMM (continuity) from I/P Cluster cavity 6 to ignition coil connector cavity B.
Is continuity present?
--
Go to Step 5
Go to Step 6
5
Replace the I/P Cluster. Refer to Instrument Cluster Replacement .
Is the repair complete?
--
Refer to Instrument Cluster System Check
--
6
Locate and repair the open in CKT 121 (WHT) between the Ignition Coil and the I/P Cluster. Refer to Wiring Repairs in Wiring Systems.
Is the repair complete?
--
Refer to Instrument Cluster System Check

Does your instrument cluster is not lighting up or what problem do you have with. Gauges?, RPM or tachometer?

Tachometer failures are very common on this brand. The tach will tend to hop around first and then just stop.
The most common failure for this concern is a faulty tach in the instrument cluster. This can be checked by using a scan tool to observe the instrument cluster data for the r.p.m. signal, if the scan tool shows a tach signal (RPM) signal then the instrument cluster isn't displaying this signal and is faulty and needs replaced or repaired.

Hope helps.

Sounds like a instrument problem. If you remove power at the battery then it should not have power to keep it at the high RPM level. There's nothing there in induce the RPM to range.

Hi,

This solution will be of great help to you,even in the case of future or other dashboard problems;
Instrument cluster consists of electronic analog gauges, various warning lights, and optional tachometer. Vehicles equipped with tachometer have an electronic vacuum fluorescent transmission range indicator (PRND3L),odometer and trip odometer display. Vehicles without tachometer are equipped with a cable-operated transmission range indicator.
Instrument cluster is equipped with the following warning lights:
Battery voltage.
Cruise (speed control).
Door ajar.
Fasten seat belt.
Lift gate ajar.
Low fuel level.
Low windshield and washer level.
Traction Control.
The Body Control Module (BCM), which receives input from various sensors, sends display information to instrument cluster and operates gauges. Instrument cluster incorporates a self-test diagnostic feature to identify electronic problems. BCM, Powertrain Control Module (PCM), and Transmission Control Module (TCM) are continuously monitored by the diagnostic system.

SELF-DIAGNOSTICS
With ignition off, press and hold TRIP and RESET buttons while turning ignition switch to ON position. Continue to hold TRIP and RESET buttons until odometer window displays CODE (approximately 5 seconds). If problem exists, system will display diagnostic trouble codes. See DIAGNOSTIC CODE CHART table. If no problem exists, Code 999 (end test) will be displayed.
DIAGNOSTIC CODE CHART
CodeDescription
110.......Cluster Memory Fault
111.......Cluster Calibration Fault
905.......No CCD Bus Message From TCM
921.......Odometer Fault From BCM
940.......No CCD Bus Message From PCM

After diagnostic code display ends, instrument cluster will go into each of the following tests in order:
Dim test.
Calibration test.
Odometer segment test.
Electronic Transmission Range indicator segment test.
Dim Test
CHEC-0 will be displayed in odometer window. Instrument cluster will dim Vacuum Florescent (VF) display. If VF displays do not dim, a problem in instrument cluster exists. See BODY CONTROL COMPUTER TESTS in BODY CONTROL COMPUTER article.
Calibration Test
CHEC-1 will be displayed in odometer window. Each of instrument cluster gauges will move sequentially through each calibration point. See GAUGE CALIBRATIONS table. If gauge needle is not calibrated properly, a problem in instrument cluster exists.

Odometer Segment Test
CHEC-2 will be displayed in odometer window. Each segment of odometer will light sequentially. If any segment does not light, replace instrument cluster.
Electronic Transmission Range Indicator Segment Test
CHEC-3 will be displayed in odometer window. Each segment of electronic transmission range indicator will light sequentially. If any segment does not light, replace instrument cluster.