TM 5-3805-298-23-1
0091
Table 1. 426 Transmission Neutralizer Pressure Sensor Diagnostic Codes - Continued.
091
CID FMI CODE
TEST OR INSPECTION
CORRECTIVE ACTION
Test Step 2. Test for Faulty
426-3 Transmission
Transmission Neutralizer Pressure
Neutralizer Pressure Sensor
Sensor.
Voltage Is Above Normal or
1. Turn ignition switch and battery
Shorted High - Continued
disconnect switch to OFF position
(TM 5-3805-298-10).
2. Disconnect connector C-C7
(WP 0012, Figure 59) from
transmission neutralizer sensor.
3. Turn battery disconnect switch and
ignition switch ON (TM 5-3805-
298-10).
4. Using MSD, check for active
Diagnostic Code 426-4 Transmission
diagnostic codes (WP 0008).
Neutralizer Pressure Sensor Voltage
Is Above Normal Becomes Inactive -
Replace neutralizer pressure sensor
(WP 0327).
Proceed to Test Step 4.
Diagnostic Code 426-4 Transmission
Neutralizer Pressure Sensor Voltage
Is Below Normal Remains Active -
Proceed to Test Step 3.
Test Step 3. Test for Shorted Lower
Cab Wiring Harness.
1. Remove left lower cab access
panels (WP 0347).
2. Remove transmission ECM cover
(WP 0266).
3. Disconnect connector C-C12
(WP 0012, Figure 26) from
Transmission ECM J1.
4. Using digital multimeter
Continuity - Replace lower cab wiring
(WP 0174), test for continuity
harness (WP 0291).
between connector C-C12
Proceed to Test Step 4.
(WP 0012, Figure 26) terminal 37
No Continuity - Proceed to step 5.
and terminal 21.
0091-5
