TM 5-3805-298-23-1
0053
Table 1. 172 Intake Manifold Air Temperature Sensor Diagnostic Codes - Continued.
CID FMI CODE
TEST OR INSPECTION
CORRECTIVE ACTION
172-3 Intake Manifold Air
3. Disconnect connector E-C7
Temperature Sensor Signal
(WP 0012, Figure 18) from intake
Voltage Is Above Normal or
manifold air temperature sensor.
the Voltage Is Shorted High -
4. Disconnect connector E-C4
Continued
(WP 0012, Figure 10) from engine
ECM connector J2.
5. Using digital multimeter
Continuity - Replace engine control
(WP 0174), test for continuity
wiring harness (WP 0294).
between connector E-C4
Proceed to Test Step 4.
(WP 0012, Figure 10) terminal 42
No Continuity - Proceed to Test Step 3.
and all other E-C4 terminals.
6. Disconnect connector E-C7
(WP 0012, Figure 18) from intake
manifold air temperature sensor.
Test Step 3. Test for Open Engine
Control Wiring Harness.
1. Connect jumper wire between
terminal 1 and terminal 2 of
connector E-C7 (WP 0012,
Figure 18).
2. Using digital multimeter
Resistance 5.0 Ohms or Less -
(WP 0174), measure resistance
Replace air Intake temperature sensor
between connector E-C4
(WP 0241).
(WP 0012, Figure 10) terminal 42
Proceed to Test Step 4.
and terminal 37.
Resistance Greater Than 5.0 Ohms -
Replace engine control wiring harness
(WP 0294).
Proceed to Test Step 4.
Test Step 4. Verify Malfunction Is
Resolved.
1. Ensure all wiring harness
connectors are connected.
2. Install right engine access panel
(WP 0348).
3. Turn battery disconnect switch ON
(TM 5-3805-298-10).
4. Using MSD, check for active
Diagnostic Code 172-3 Intake
diagnostic codes (WP 0008).
Manifold Air Temperature Sensor
Signal Voltage Is Above Normal
Becomes Inactive - Troubleshooting
complete.
Diagnostic Code 172-3 Intake
Manifold Air Temperature Sensor
Signal Voltage Is Above Normal
Remains Active - Repeat
troubleshooting from the beginning.
