TM 5-3805-296-23-1
0033
Table 1. 0274 Atmospheric Pressure Sensor Diagnostic Codes Continued.
033
CID FMI
TEST OR INSPECTION
CORRECTIVE ACTION
274-4 Atmospheric Pressure Sensor
4. At MSD, check for active
0274-03 Atmospheric
Voltage Below Normal Becomes
diagnostic code 274-4
Pressure Sensor Voltage
Active Replace atmospheric
Atmospheric Pressure Sensor
Above Normal Continued
pressure sensor (WP 0244).
Voltage Below Normal (WP 0008).
Proceed to Test Step 7.
274-3 Atmospheric Pressure Sensor
Voltage Above Normal Remains
Active Proceed to Test Step 6.
Test Step 6. Test Basic Engine
Wiring Harness for High Resistance
or Open.
1. Turn ignition switch and battery
disconnect switch to OFF position
(TM 5-3805-296-10).
2. Do not remove jumper wire from
terminal 3 and terminal 2
of connector CM-C4
(WP 0012, Figure 16).
3. Disconnect connector CM-C1
(WP 0012, Figure 30) from engine
ECM.
4. Using digital multimeter
Resistance 5.0 Ohms or Less
(WP 0540), measure resistance
Replace engine ECM (WP 0252).
between connector CM-C1
Proceed to Test Step 7.
terminal 17 and terminal 57
Resistance Greater Than 5.0 Ohms
(WP 0012, Figure 30).
Replace basic engine wiring harness
(WP 0251).
Proceed to Test Step 7.
0033-5
