XJR (X308) V8-4.0L SC (AJ26) (1998)
A3: CHECK ECT SENSOR RANGE
Allow the engine to achieve any noted temperature within the specified range, refer to temperature/resistance relationship table or graph
Ignition switch to position
Disconnect PI004
Rear of top hose
Measure the resistance between sensor pins 1 and 2.
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Temperature/resistance relationship OK?
Yes
GO to [A4]
No
Remove sensor and check temperature/resistance relationship for 3 different temperatures.
Renew as required and test the system for normal operation.
A4: CHECK HARNESS CONTINUITY
Ignition switch to position 0
Disconnect EM011
Inside ECM housing.
Measure the resistance between EM011/009 and PI004/002.
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Is the resistance < 0.5 Ohms?