Temperature Gauge

Coolant Temperature Gauge:

WIRING DIAGRAM

Coolant Temperature Gauge: Component Location:

COMPONENT LOCATION VIEW

Coolant Temperature Gauge: Component ID:

COMPONENT ID
16 Rheostat, lighting for instruments and controls, on dashboard between the steering wheel and driver's door.
23 Flasher relay in main fuse box behind the glove box.
45 Engine coolant temperature sensor, on the left-hand side of the thermostat housing.
In The Main Instrument Display Panel
18 Lighting
47a Fuel gauge
47b Indicator lamp for low fuel level.
47c Coolant temperature gauge
47 Direction indicator repeater lamp, right-hand
210 EDU trip computer
289 Anti-theft alarm control module, under dashboard on the right behind the knee shield.
583 Control module, anti-theft alarm with immobilizer, under dashboard on the right behind the knee shield.

70-Pin Connector
H70-1 In the engine bay, behind the bulkhead partition.

Grounding Points
G8 Grounding point, dashboard, by the left-hand front loudspeaker socket.

DESCRIPTION OF OPERATION
Coolant Temperature Gauge 47c
The temperature gauge displays the temperature of the engine coolant.

When the ignition switch is in the Drive position, 12 V is applied to pin 2 of the temperature gauge from pin 22 of EDU 210. Coolant temperature sensor 45 is connected to the EDU unit which performs a calculation and sends a 1-9 V signal to pin 7 of the tank/ temperature unit.

1 V = min. temp
9 V = max. temp

Temperature gauge 47c, fuel gauge 47a, instrument lighting lamps 18, and indicator lamp 47i are connected to ground via pin 5.

Instrument Lighting 18
Backlighting of the instruments is regulated by rheostat 16 (lighting for instruments and controls) via pin 6.

Indicator Lamp 47i
The indicator lamp for the right-hand direction indicators is controlled by flasher relay 23 via pin 4. The lamp can also be activated directly from the anti-theft alarm control module.

FAULT DIAGNOSIS HINTS
The temperature gauge is activated when the ignition switch is turned to the Drive position.
1. Check that current is supplied to pin 2.
2. Check that current is supplied to pin 22 of EDU 210.
3. Check that 1-9 V is applied to pin 7.
4. Check the connectors, wiring harness and ground connections.