TM 5-3805-296-23-1
0025
Table 1. 0172 Intake Manifold Air Temperature Sensor Diagnostic Codes Continued.
025
CID FMI
TEST OR INSPECTION
CORRECTIVE ACTION
NOTE
0172-04 Intake Manifold Air
Temperature Sensor Voltage
Always inspect harness connectors that are involved in the circuit. Poor
Below Normal
connections can often be the cause of a problem in an electrical circuit.
Verify that all connections in the circuit are clean and secure and that all
connections are in good condition. If a problem with the connection is
found, correct the problem and verify that this malfunction or diagnostic
code is active before performing this procedure.
Perform open or short-circuit test at each harness connection to identify
the correct harness to replace.
Tag all wiring harnesses to aid in installation.
Perform this test only if condition is active.
DIAGNOSTIC CODE SET CONDITION
Engine ECM Detects Below Normal Voltage on Intake Air Temp Sensor Signal
Circuit C967.
POSSIBLE CAUSE
Basic Engine Wring Harness Shorted.
Intake Air Temperature Sensor.
Engine ECM.
Test Step 1. Test for Shorted Intake
Air Temperature Sensor.
1. Turn ignition switch and battery
disconnect switch to OFF position
(TM 5-3805-296-10).
2. Disconnect connector CM-C5
(WP 0012, Figure 18) from intake
air temperature sensor connector
(WP 0012, Figure 17).
3. Turn battery disconnect switch and
ignition switch to ON position
(TM 5-3805-296-10).
172-4 Intake Manifold Air
4. At MSD, check for active
Temperature Sensor Voltage Below
diagnostic code 172-4 Intake
Normal Becomes Inactive Replace
Manifold Air Temperature Sensor
intake air temperature sensor
Voltage Below Normal (WP 0008).
(WP 0219).
Proceed to Test Step 3.
172-4 Intake Manifold Air
Temperature Sensor Voltage Below
Normal Remains Active Proceed to
Test Step 2.
