With Integrated Fault-Diagnosis System (Flash Codes): 12214

Diagnostic procedure




1 Select command code 250 on the ISAT scan tool.

The current engine coolant temperature should now be shown on the display, e.g. 80 + 080 if the temperature is +80°C.

Alternatively, the LH system tester can be used.

2 With the temperature sensor connector unplugged, take a reading of the resistance of the temperature sensor, see table.
-Cars without ETS: across pins 1 and 2
-Cars with ETS: across pin 1 and ground
If the resistance reading obtained is not Ok, change the temperature sensor.




3 If the resistance reading is OK, plug in the temperature sensor connector and unplug the LH control module connector. Connect the Breakout Box.

Take a resistance reading across pin 13 (LH 2.2 pin 2) and a good ground.

The resistance reading obtained should be as shown in the table (a few ohms higher is acceptable).

If the resistance reading obtained is OK, go to point 4.

If it is not, check the lead between pin 13 of the connector (LH 2.2 pin 2) and pin 1 of the temperature sensor connector.

4 Check the lead between pin 2 of the temperature sensor connector and the grounding point on the engine (not ETS).

If the lead is OK, go to point 5.

5 Try fitting a new control module.

Table: