Opel Frontera UE. Manual - part 520

8D–220

WIRING SYSTEM

Speedometer Pointer Fluctuates (May be Wide Fluctuation)

Step

Action

Value(s)

Yes

No

1

NOTE: Refer to the step 8 of diagnosis procedure for
Speedometer and Odometer Does Not Function is this
section.

Is the vehicle speed sensor signal normal?

—

Replace the

meter

assembly

Go to step 2

2

Repair a poor connections of the connectors or a failure
in the circuit between connector 1–2 terminal 12 and
connector M–10 terminal 3.

Is the action complete?

—

Verify repair

—

Speedometer Pointer Jumps Erratically

Step

Action

Value(s)

Yes

No

1

NOTE: Refer to the step 8 of diagnosis procedure for
Speedometer and Odometer Does Not Function is this
section.

Is the vehicle speed sensor signal normal?

—

Replace the

meter

assembly

Go to step 2

2

Repair a poor connections of the connectors or a failure
in the circuit between connector 1–2 terminal 12 and
connector M–10 terminal 3.

Is the action complete?

—

Verify repair

—

Tachometer Does Not Function

Step

Action

Value(s)

Yes

No

1

1. Disconnect the meter connector I–2.
2. Check the waveform of terminal 6 when the engine

revolution is 3000 rpm with a oscilloscope.

NOTE: Normal waveform shows between 4.3V and
0.4V and its cycle is 6.7m sec.

Is the waveform normal?

—

Replace the

meter

assembly

Go to step 2

2

Is the circuit between connector I–2 terminal 6 and the
PCM connector C–2 terminal C10 normal?

—

Replace the

PCM

Repair the

circuit

Tachometer Pointer Fluctuates (May Be Wide Fluctuation)

Step

Action

Value(s)

Yes

No

1

NOTE: Refer to the step 1 of diagnosis procedure for
Tachometer Does Not Function in this section.

Is the waveform normal?

—

Replace the

meter

assembly

Go to step 2

2

Is the circuit between connector I–2 terminal 6 and the
PCM connector C–2 terminal C–10 normal?

—

Replace the

PCM

Repair the

circuit

8D–221

WIRING SYSTEM

Tachometer Pointer Jumps Erratically

Step

Action

Value(s)

Yes

No

1

NOTE: Refer to the step 1 of diagnosis procedure for
Tachometer Does Not Function in this section.

Is the waveform normal?

—

Replace the

meter

assembly

Go to step 2

2

Is the circuit between connector I–2 terminal 6 and the
PCM connector C–2 terminal C–10 normal?

—

Replace the

PCM

Repair the

circuit

Engine Coolant Temperature (ECT) Gauge Pointer Does Not Move

Step

Action

Value(s)

Yes

No

1

Is the engine coolant temperature (ECT) unit connector
E–19 connected securely?

—

Go to step 2

Connect it

securely

2

1. Disconnect the ECT unit connector E–19.
2. Connect a 3.4W bulb between harness side

connector E–19 terminal 1 and the ECT unit ground.

3. Turn the starter switch on.

Does the ECT gauge pointer move about 10 seconds
after that?

—

Replace the

ECT unit

Go to step 3

3

Is there continuity between harness side connector I–1
terminal 7 and connector E–19 terminal 1?

—

Replace the

meter

assembly

Repair the

circuit

Engine Coolant Temperature (ECT) Gauge Reading is Too Low

Step

Action

Value(s)

Yes

No

1

1. Disconnect the ECT unit connector E–19.
2. Turn the starter switch on.
3. Connect harness side connector E–19 terminal 1

with the ground.

Does the indication of the ECT gauge vary?

—

Replace the

ECT unit

Go to step 2

2

1. Disconnect the meter connector I–1.
2. Connect meter side connector I–1 terminal 7 with

the ground.

Does the indication of the ECT gauge vary?

—

Go to step 3

Replace the

meter

assembly

3

Repair an open circuit between connector I–1 terminal
7 and connector E–19 terminal 1.

Is the action complete?

—

Verify repair

—

8D–222

WIRING SYSTEM

Engine Coolant Temperature (ECT) Gauge Pointer Overshoots (or Goes Up To the “H”
Range)

Step

Action

Value(s)

Yes

No

1

1. Disconnect the ECT unit connector E–19.
2. Turn the starter switch on.
3. Connect harness side connector E–19 terminal 1

with the ground.

Does the indication of the ECT gauge vary?

—

Replace the

ECT unit

Go to step 2

2

Disconnect the meter connector I–1.

Does the indication of the ECT gauge vary?

—

Go to step 3

Replace the

meter

assembly

3

Repair an open circuit between connector I–1 terminal
7 and connector E–19 terminal 1.

Is the action complete?

—

Verify repair

—

Fuel Gauge Needle Does Not Move

Step

Action

Value(s)

Yes

No

1

Is B–8 grounded securely?

—

Go to step 2

Ground it

securely

2

Disconnect the fuel tank unit connector F–1.

Is there continuity between the harness side connector
F–1 terminal 2 and the ground?

—

Go to step 4

Go to step 3

3

Repair an open circuit between connector F–1 terminal
2 and the ground B–8.

Is the action complete?

—

Verify repair

—

4

1. Connect a 3.4W bulb between the harness side

connector F–1 terminal 3 and the ground.

2. Turn the starter switch on.

Does the fuel gauge needle fluctuate after about 90
seconds?

—

Replace the

fuel tank unit

Go to step 5

5

Disconnect the meter connector I–2.

Is there continuity between the harness side connector
I–2 terminal 14 and connector F–1 terminal 3?

—

Replace the

meter

assembly

Go to step 6

6

Repair an open circuit between the meter assembly
and the fuel tank unit.

Is the action complete?

—

Verify repair

—

8D–223

WIRING SYSTEM

Even the Tank is Filled Up With Fuel, The Needle Does Not Reach “F”

Step

Action

Value(s)

Yes

No

1

Disconnect and connect the fuel tank unit connector
F–1 several times.

Does the indication of the fuel gauge vary?

—

Go to step 2

Go to step 3

2

Repair a poor connection of the fuel tank unit connector
F–1.

Is the action complete?

—

Verify repair

—

3

1. Disconnect the fuel tank unit connector F–1.
2. Connect the harness side connector F–1 terminal 2

and 3 with a lead wire.

3. Turn the starter switch on.

Does the fuel gauge needle overshoot to “F” after about
5 minutes?

—

Repair or

replace the

fuel tank unit

Replace the

meter

assembly

Even When The Tank Is Not Filled With Fuel, The Needle Overshoots To “F”

Step

Action

Value(s)

Yes

No

1

1. Disconnect the fuel tank unit connector F–1.
2. Turn the starter switch on.

Does the needle point to “E”?

—

Replace the

fuel tank unit

Go to step 2

2

Is there a short circuit between the meter connector I–2
terminal 14 and the fuel tank unit connector F–1
terminal 3?

—

Repair a

short circuit

Replace the

meter

assembly