Fuel Gauge -- S27-S32
Fault tracing, GaugesFuel gauge, fault tracing S27
1982-1984
- See if the temperature gauge is also reading incorrectly.
If both readings are incorrect, the voltage stabilizer is most likely faulty as per S26.
If temperature gauge reads correctly, check gauge with a test resistor as per S28.
Lever type fuel gauge, fault tracing S28
1985-1986
Check fuel gauge with a test resistor of 68 ohm, P/N 999 5824-1.
- Disconnect battery negative lead.
- Disconnect lead at sensor.
- Connect the test resistor between ground and the disconnected lead.
- Reconnect battery negative lead and turn on ignition.
If the gauge is in order, the pointer should show 3/4 full. See illustration.
Tolerance: ± breadth of pointer.
If the gauge reads correctly, the sensor is faulty.
If the gauge reads incorrectly, the gauge itself is faulty.
- Fit new unit.
If the gauge shows no reading at all, the lead may be open circuit.
- Check for continuity with an ohmmeter.
- If the lead is OK, replace gauge.
Tubular type fuel gauge, fault tracing S29
1986-1992
- See if temperature gauge is working. The fuel gauge supply comes from the temperature gauge.
If the temperature gauge works, check the fuel gauge with a test resistor of 68 ohm, P/N 999 5824-1.
- Make an adapter by assembling the following parts. See illustration:
RK 1.0 gray wire (P/N 970 595-5).
Terminal 8.5 x 1.0-2.5, (P/N 965 824-6).
Sleeve insulator 3R (P/N 948 296-9).
Terminal FSH 6.3 x 1.0-2.5 (P/N 949 404-8).
Cover 2 x 6.0 (P/N 948 511-6).
- Disconnect sensor lead in tank.
- Connect test resistor between ground and the disconnected white-gray lead.
If gauge is OK for 60-liter (15.9 US gal.) tank, left hand side of pointer should just touch red section of gauge.
If gauge is OK for 80-liter (21.1 US gal.) tank, right side of pointer should just touch red section of gauge.
Tolerance: ± breadth of pointer.
- If the gauge reads correctly, the sensor is faulty
Tubular type fuel gauge, fault tracing S30
1993-
- Unplug the 4-pole connector near left wheel arch.
- Connect an ohmmeter between the brown and gray-white leads and measure resistance.
- Resistance with an empty tank should be 125 ohm.
- Resistance with a full tank should be 0 ohm.
- If different from above, the sensor should be replaced.
- If the gauge is outside the tolerances:
Check whether the gauge is set for 60 liter or 80 liter tank.
Screw for Yazaki or clip for VDO on rear should be screwed in for 60-liter tank (15.9 US gal.), and unscrewed for 80-liter tank (21.1 US gal.).
- If the gauge is correctly set and shows wide imprecision, the sensor is faulty.
- If gauge is correctly set and shows a small divergence, the gauge can be adjusted as set out below.
- If there is no reading at all, see if the leads from sensor to gauge are open circuit.
If leads are OK, the gauge should be replaced.
Note: When replacing fuel gauge, check whether there Is an adjustment potentiometer mounted on the rear side of instrument panel. If so, the gauge must be adjusted as set out below.
Fuel gauge, fault tracing S31
1987-
- Follow instructions as per S29. The only difference in method lies in deflection of pointer when test resistor is connected.
If gauge is working correctly, the pointer should show 1/4 deflection for a 60-liter tank (15.9 US gal.). See illustration.
If gauge is working correctly for an 80-liter tank (21.1 US gal.), the pointer should show 1/5 deflection. See illustration.
Fuel gauge with LED, fault tracing S32
The LED should come on when 5 - 6.5 liters (1.32-1.7 US gal.) of petrol are left in the tank.
Check the following readings:
Do not change gauge until these readings have been checked.