G420E/G424E Tier LP Engine Advanced Diagnostics 52
Table a. MI-04 Diagnostic Fault Codes (Flash Codes)
DFC Probable Fault Action Corrective Action, First Check
34 MapSensorInputHigh
TMAP sensor failure or shorted circuit
Disable Throttle Check TMAP connector and MAP
signal wiring for a shorted 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
)
37 IATSensorInputLow
TMAP sensor failure or shorted circuit
Stored Fault Code
(MIL Only)
Check TMAP connector and IAT
signal wiring for a shorted circuit
TMAP PIN 2 to SECM PIN 4
(SIGNAL)
TMAP PIN 1 to SECM PIN 1 (GND)
TMAP PIN 3 to SECM PIN 18 (XDCR
+5VDC)
To check the IAT sensor of the TMAP
disconnect the TMAP connector and
measure the IAT resistance
*See the IAT table in Chapter 6.0
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