TM 5-3805-298-23-1
0066
Table 1. 1834 Ignition Key Switch Circuit Diagnostic Codes - Continued.
066
CID FMI CODE
TEST OR INSPECTION
CORRECTIVE ACTION
Test Step 4. Test Ignition Voltage
1834-2 Ignition Key Switch
Supply Circuit to Engine ECM for an
Circuit Voltage Erratic,
Open.
Intermittent, or Incorrect -
1. Disconnect connector EN-C1
Continued
(WP 0012, Figure 11) from engine
ECM (WP 0265).
2. Using a digital multimeter
Resistance 5.0 Ohms or Less -
(WP 0174), measure resistance
Replace ignition switch (WP 0254).
between C-C61 (WP 0012,
Proceed to Test Step 9.
Figure 36) terminal 1 and EN-C1
Resistance More Than 5.0 Ohms -
(WP 0012, Figure 11) terminal 40.
Proceed to step 3.
3. Remove right lower cab access
panels (WP 0347).
4. Disconnect connector C-C19
(WP 0012, Figure 23) from
connector EN-C8 (WP 0012,
Figure 22).
5. Using a digital multimeter
Resistance 5.0 Ohms or Less -
(WP 0174), measure resistance
Replace lower cab wiring harness
between EN-C8 (WP 0012,
(WP 0291).
Figure 22) terminal 3 and EN-C1
Proceed to Test Step 9.
(WP 0012, Figure 11) terminal 40.
Resistance 5.0 Ohms or More -
Replace engine wiring harness
(WP 0299).
Proceed to Test Step 9.
Test Step 5. Test Battery Voltage
Supply Circuit to Ignition Switch for
Short to Ground.
1. Disconnect connector C-C61
(WP 0012, Figure 36) from ignition
switch (WP 0254).
2. Disconnect connector C-C56
(WP 0012, Figure 46) from
instrument cluster (WP 0252).
3. Using a digital multimeter
Continuity - Replace lower cab wiring
(WP 0174), test for continuity
harness (WP 0291).
between connector C-C61
Install new Monitoring/Key fuse
(WP 0012, Figure 36) terminal 4
(TM 5-3805-298-10).
and machine ground.
Proceed to Test Step 9.
No Continuity - Replace ignition switch
(WP 0254).
Install new Monitoring/Key fuse
(TM 5-3805-298-10).
Proceed to Test Step 9.
0066-5
