900 L4-1985cc 2.0L DOHC (1986)
Operation
The temperature gauge shows the engine coolant temperature. The wiring on 1984 models differs from that of 1985 and 1986 models.
1984 models
When the ignition switch is in the drive position, coolant temperature gauge 47C is supplied (+15) via the 29-pole white connector 152A. The other
terminal of the gauge is earthed via coolant temperature transmitter 45.
Changes in the coolant temperature will affect the resistance of the transmitter, and the gauge will thus show the prevailing engine temperature.
1985 and 1986 models
The operation is the same as on 1984 models, but the supply is taken via fuse 22.
Fault-tracing hints
The temperature gauge will be operative when the ignition switch is in the drive position.
1984 models
1. Check that the supply to the temperature gauge is live.
2. Check that there is no open circuit in transmitter 45.
3. Check the connectors, cable harnesses and earth connections.
1985 and 1986 models
1. Check fuse 22 and check that the supply to it is live.
2. Check that the supply to the temperature gauge is live.
3. Check that there is no open circuit in transmitter 45.
4. Check the connectors, cable harnesses and earth connections.
