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)
~3.0
Ω
+/-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)
(2.4k
Ω
-
8.2k
Ω
)
TMAP PIN 3(PWR) to PIN 4
(PRESSURE SIGNAL KPA)
(3.4k
Ω
-
8.2k
Ω
)
