Service manual

G420F(FE) Service Manual Chapter 9. Advanced Diagnostics 281
Table 1. Fault List Definitions (cont’d.)
FAULT DESCRIPTION
CODE
(MI04 CODE)
ECTRangeLow
Engine Coolant Temperature Sensor Input is Low. Normally
set if the coolant sensor wire has shorted to chassis ground
or the sensor has failed.
141
(14)
ECT_IR_Fault Engine Coolant Temperature not changing as expected 171
EST1_Open
EST1 output open, possibly open EST1 signal or defective
spark module
421
(42)
EST1_Short
EST1 output shorted high or low, EST1 signal shorted to
ground or power or defective spark module
431
EST2_Open
EST2 output open, possibly open EST2 signal or defective
spark module
422
EST2_Short
EST2 output shorted high or low, EST2 signal shorted to
ground or power or defective spark module
432
EST3_Open
EST3 output open, possibly open EST3 signal or defective
spark module
423
EST3_Short
EST3 output shorted high or low, EST3 signal shorted to
ground or power or defective spark module
433
EST4_Open
EST4 output open, possibly open EST4 signal or defective
spark module
424
EST4_Short
EST4 output shorted high or low, EST4 signal shorted to
ground or power or defective spark module
434
EST5_Open
EST5 output open, possibly open EST5 signal or defective
spark module
425
EST5_Short
EST5 output shorted high or low, EST5 signal shorted to
ground or power or defective spark module
435
EST6_Open
EST6 output open, possibly open EST6 signal or defective
spark module
426
EST6_Short
EST6 output shorted high or low, EST6 signal shorted to
ground or power or defective spark module
436
EST7_Open
EST7 output open, possibly open EST7 signal or defective
spark module
427