Operation Section
71
Table 2. Diagnostic Fault Codes (Flash Codes) cont’d.
DFC
PROBABLE FAULT
FAULT ACTION *
CORRECTIVE ACTION FIRST CHECK
432
EST2_Short
EST2 output shorted high or
low, EST2 signal shorted to
ground or power or defective
spark module
TurnOnMil
Check coil driver wiring and connector for
shorts
SECM Pin A10 (EST2) to ignition module
Pin D (4-pin connector)
Verify GND on ignition module
Pin A (of both connectors)
12 Vdc on ignition module
Pin B (of both connectors)
Refer to application manual for specific
engine details.
433
EST3_Short
EST3 output shorted high or
low, EST3 signal shorted to
ground or power or defective
spark module
TurnOnMil
Check coil driver wiring and connector for
shorts
SECM Pin A3 (EST3) to ignition module
Pin D (4-pin connector)
Verify GND on ignition module
Pin A (of both connectors)
12 Vdc on ignition module
Pin B (of both connectors)
Refer to application manual for specific
engine details.
434
EST4_Short
EST4 output shorted high or
low, EST4 signal shorted to
ground or power or defective
spark module
TurnOnMil
Check coil driver wiring and connector for
shorts
SECM Pin A6 (EST4) to ignition module
Pin D (4-pin connector)
Verify GND on ignition module
Pin A (of both connectors)
12 Vdc on ignition module
Pin B (of both connectors)
Refer to application manual for specific
engine details.
435
EST5_Short
EST5 output shorted high or
low, EST5 signal shorted to
ground or power or defective
spark module
None N/A
436
EST6_Short
EST6 output shorted high or
low, EST6 signal shorted to
ground or power or defective
spark module
None N/A
(*) Fault actions shown are default values specified by the OEM.
