TM 9-2320-302-20
0011 00-2
Table 1. Transmission and Driveline Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Transmission Shifting - Continued
Vehicle Does Not Drive
1. Faulty ECU.
Replace ECU (WP 0124 00).
2. Engine does not start.
Repair engine starting system
(WP 0006 00).
3. Faulty harness.
Repair harness (WP 0119 00) or
replace harness (WP 0125 00).
4. Faulty
interface
wiring
to
vehicle electrical system.
Repair wiring (WP 0119 00).
5. Transmission fluid temperature
too low.
Warm transmission fluid.
6. Faulty ECU.
Replace ECU (WP 0124 00).
2. DO NOT SHIFT Light Flashes Intermittently. 1. Intermittent power to ECU.
Check connections to ECU and
correct if necessary.
2. Faulty or incorrect ground wire
attachment.
Repair ground circuit (WP
0119 00).
3. No DO NOT SHIFT Light at Ignition.
1. Faulty light bulb or socket.
Replace light bulb or socket (WP
0120 00).
2. Faulty wiring harness.
Check wiring between ECU and
DO NOT SHIFT light. Repair
where necessary (WP 0119 00).
3. Faulty ECU.
Replace ECU (WP 0124 00).
4. ECU Will Not Turn Off When Ignition Switch
Is Turned Off.
Faulty ignition switch.
Replace ignition switch (WP
0010
00).
Notify
Direct
Support Maintenance.
5. Transmission Will Not Shift to Forward or
Reverse (Stays In Neutral).
1. Engine RPM too high.
Reduce engine RPM.
2. Low transmission fluid level.
Add fluid to proper level (TM 9-
2320-302-10).
3. Transmission fluid temperature
too low.
Warm transmission fluid.
4. Throttle position sensor set-up
is incorrect.
Refer to throttle position sensor
for correct set-up (WP 0006 00).
5. Voltage to ECU too low.
Check
vehicle
battery
and
charging system (WP 0010 00).
6. Shift selector is not functioning
properly.
Replace shift selector (WP
0120 00).
7. Disconnected
or
dirty
connectors.
Perform connector checkout.
8. Faulty wiring harnesses.
Repair harness (WP 0119 00).
9. Faulty ECU.
Replace ECU (WP 0124 00).
6. Transmission Will Not Stay in Forward or
Reverse.
Auto-neutral or quick-to-neutral
circuit (input function) faulty.
Notify
Direct
Support
Maintenance.
