TM 5-3805-291-23-1
TROUBLESHOOTING WITH A DIAGNOSTIC CODE - CONTINUED
0009 00
Table 3. Powertrain Control - Continued.
(MID 081)
CID FMI CODE
TEST OR INSPECTION
CORRECTIVE ACTION
1521 03
427-C1640
N OT E
The following procedure can create other faults that can be detected by the powertrain
ECM. Ignore these created faults and clear created faults when fault is corrected.
Ensure diagnostic code CID 1521 FMI 03 is active before performing this procedure.
If code does NOT remain active during operaion of switch, this could indicate a possi-
t
ble open circuit (which corresponds to switch position) in harness.
1. Check for an open circuit.
(a) Operate machine (TM 5-3805-291-
10).
(b) Connect MSD (WP 0005 00) and check
status of CID 1521 FMI 03 while
activating and deactivating each
position of autoshift switch. Note
results.
(c) Turn battery disconnect and engine
start switches to OFF position (TM 5-
3805- 291-10).
(d) Disconnect wiring harness connectors
from powertrain ECM (WP 0063 00).
(e) At wiring harness connector for
1. If continuity checks do not agree with
powertrain ECM, check continuity to
ground and open combinations, replace
ground of open contacts and grounded
the autoshift switch (WP 0055 00).
contact for each position of
2. If continuity checks agree with ground
transmission autoshift switch. Activate
and open combinations, go to Test 2.
and deactivate each position of
transmission autoshift switch.
