Comprehensive Component Monitor (Engine Output)

OBD System Description - Comprehensive Component Monitor (Engine Output)

EST Output Fault

DTC Description / Detecting Condition / Confirmation Procedure
P0351 (EST Output 1 Fault) refer to DTC P0351: Ignition Coil 1 and 4 Control Circuit. P0351
P0352 (EST Output 2 Fault) refer to DTC P0352: Ignition Coil 2 and 3 Control Circuit. P0352

Monitor Strategy Description
Detects a short to ground, to battery or open circuit on ESC output. The output driver hardware sets "Failure Criteria Met = TRUE" if output state does not equal the expected return voltage.

Malfunction Criteria
Fail Criteria Met = TRUE

Enable Conditions
Disabling Faults Present = FALSE
AND Engine Running = RUN
AND Ignition Voltage = 11 V
AND Ignition Voltage = 16 V
AND Enable Time delay = 0.5 s

Time required
Time Length and Frequency:
40 test failures within a 80 test samples.
Failure Time:
Continuous monitoring every 125 ms.