G420E/G424E Tier LP Engine Advanced Diagnostics 51
Table a. MI-04 Diagnostic Fault Codes (Flash Codes)
DFC Probable Fault Action Corrective Action, First Check
29 ETCDriverFault
Throttle driver over-current or driver
signals shorted
Disable Throttle Check ETC driver wiring for a shorted
circuit
ETC+ PIN1 to SECM PIN 22
ETC- PIN 4 to SECM PIN 24
z Perform Throttle test and with
the Service Tool and re-check for
fault
Check the ETC internal motor drive
by disconnecting the throttle
connector and measuring the motor
drive resistance at the throttle
TPS PIN 1 (+DRIVER) to PIN 4 (-
DRIVER) ~3.0Ω +/-30%
33 MapSensorInputLow
MAP signal disconnected, open
circuit or sensor malfunction
(Expected faults when TMAP
connector is unplugged
CODES: 33 & 38)
Disable Throttle
Check TMAP connector and MAP
signal wiring for an open circuit
TMAP PIN 4 to SECM PIN 5
(SIGNAL)
TMAP PIN 1 to SECM PIN 1 (GND)
TMAP PIN 3 to SECM PIN 18
(XDCR +5VDC)
Check the MAP sensor by
disconnecting the TMAP connector
and measuring at the sensor
TMAP PIN 1(GND) to PIN 4
(PRESSURE SIGNAL KPA) (2.4kΩ -
8.2kΩ)
TMAP PIN 3(PWR) to PIN 4
(PRESSURE SIGNAL KPA) (3.4kΩ -
8.2kΩ)
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