Service manual

G420F(FE) Service Manual Chapter 9. Advanced Diagnostics 296
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)
Verify +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) Verify +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)
Verify +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.