Malfunction Criteria And Threshold Value(S)

WARNING: This page is about a different car, the 2006 Suzuki Verona. However, it is still accessible from the selected car via links, so may be relevant.

ECT stuck signal:

Difference of substitute coolant temperature values > Table value (Up to 110.25 °C)

Difference of measured coolant temperature values < Table value (Up to 35.25 °C)

If this error is detected then the ECT model temp is used. The error will latch for this drive cycle.

ECT stuck high:

Detected ECT difference for coolant temperature stuck high diagnosis < 2.25 °C

And

Part load request = 1

Full load request = 1

And

RPM > 1,400 rpm

And

VS > 35 km/h

And

Air-mass flow per segment in kg/h > 25 kg/h

=> Decrement Enable condition 1 (higher load) delay counter for coolant temperature stuck high diagnosis.

(Idle speed request = 1 and VS < 20 km/h)

Engine operating state (trailing throttle fuel cut off) = 1

=> decrement Enable condition 2 (lower load) delay counter for coolant temperature stuck high diagnosis.

Enable condition 2 (lower load) delay counter for coolant temperature stuck high diagnosis = 0

And

Enable condition 1 (higher load) delay counter for coolant temperature stuck high diagnosis = 0

And

Time after engine start > 600 s

→ Failure detected

ECT sensor stuck in range:

Difference of measured ECT and Air temperature at the throttle body at start > table (43.50 °C up to 59.25 °C)

Measured ECT > table (43.50 °C up to 59.25 °C)