Fuel Gauge & Warning Light
- Unplug connector at fuel tank sending unit. Connect a 3.4 watt test lamp between lead wire and ground. Turn ignition on. Bulb should start flashing and needle should vibrate.
- Turn ignition off. Connect ohmmeter to sending unit terminal and ground. Move sender arm and check that resistance varies smoothly. Pointer of gauge should move when sender is connected and float arm is moved.
FUEL SENDING UNIT RESISTANCE
| Model |
Float Position |
Ohms |
| Camry |
Full |
2-6 |
| " |
Empty |
79-90 |
| Land Cruiser |
Full |
15-19 |
| " |
Half |
35-45 |
| " |
Empty |
113-127 |
| All Others |
Full |
1-5 |
| " |
Half |
28-37 |
| " |
Empty |
102-118 |
- With gauge connector in place and ignition on, check for voltage at gauge terminals. At one terminal, 2-7 volts should be present. Check gauge resistance by measuring across terminals. Be sure ignition is off and connector unplugged.
- To check low fuel warning light sensor, remove fuel sender from tank. Connect battery voltage to sensor terminal. Connect a 3.4 watt test lamp between body of sending unit and ground. With sensor dry, light should come on within 40 seconds. With sensor in gasoline or water, light should not come on.
FUEL & TEMPERATURE GAUGE RESISTANCE
| Model Type |
Term. Conn. |
Fuel (Ohms) |
Temp. (Ohms) |
| 2-Term. Gauge |
| Corolla (FWD) |
IG-FU |
55 |
N/A |
| " |
IG-TU |
N/A |
55 |
| Land Cruiser |
N/A |
25 |
25 |
| Pickup & 4Runner |
N/A |
55 |
25 |
| Tercel |
IGN-FU |
55 |
N/A |
| " |
TU-1 |
N/A |
55 |
| Van |
N/A |
|
55 |
| 3-Term. Gauge |
| Camry |
IG-TU |
N/A |
86-106 |
| " |
TU-E |
N/A |
98-120 |
| " |
IG-E |
N/A |
184-226 |
| " |
IG-FU |
70-86 |
N/A |
| " |
FU-E |
126-154 |
N/A |
| " |
IG-E |
115-141 |
N/A |
| Celica & Supra |
IG-U |
102 |
56 |
| " |
U-E |
101 |
202 |
| " |
IG-E |
203 |
146 |
| Corolla (RWD) |
IG-U |
102 |
56 |
| " |
U-E |
101 |
156 |
| " |
IG-E |
203 |
255 |
| Cressida |
IG-U |
83 |
135 |
| " |
U-E |
156 |
138 |
| " |
IG-E |
239 |
273 |
| MR2 |
FU-E |
101 |
N/A |
| " |
IG-E |
102 |
56 |
| " |
IG-FU |
203 |
N/A |
| " |
IG-TU |
N/A |
146 |
| " |
TU-E |
N/A |
202 |
| Pickup & 4Runner |
IG-FU |
83 |
N/A |
| " |
FU-E |
156 |
N/A |
| " |
IG-E |
239 |
N/A |
| " |
IG-TU |
N/A |
135 |
| " |
TU-E |
N/A |
138 |
| " |
1G-E |
N/A |
273 |
| Tercel |
IGN-TU |
N/A |
70 |
| " |
TU-GE |
N/A |
161 |
| " |
IGN-GE |
N/A |
231 |
| " |
IGN-FU |
86 |
N/A |
| " |
FU-E |
139 |
N/A |
| " |
IG-E |
224 |
N/A |
| Van |
IG-FU |
125 |
N/A |
| " |
FU-E |
55 |
N/A |
| " |
IG-E |
70 |
N/A |
| " |
IG-TU |
N/A |
55 |
| " |
TU-E |
N/A |
125 |
| " |
IG-E |
N/A |
70 |