W T E C I I I E L E C T R O N I C C O N T R O L S T R O U B L E S H O O T I N G M A N U A L
0011 00-51
4. If power is correct but the diagnostic tool reading indicates incorrect voltage, closely inspect
terminals V1 and V16 or S16; make sure they are not corroded or deformed. Clean or replace
as necessary.
5. If the voltage condition is intermittent, closely inspect the vehicle wiring for transmission system
power and grounds. Check for loose, dirty, or painted connections. Check the VIM for loose,
incorrect, or overheating relays or fuses (refer to Appendix E). Check for wires that are chafed
and touching other components.
6. If no other cause is found, replace the ECU. If replacing the ECU corrects the problem, reinstall
the original (bad) ECU to confirm that the problem is in the ECU. If the original ECU now works,
inspect the ECU connectors for any corrosion or damage which may cause an intermittent condi-
tion. If the original problem recurs, reinstall the replacement ECU.
Table 53. Voltage Chart
Voltage
Condition
33.0
(High Set Point)
High Fail Limit
32.0
Maximum Continuous ECU Voltage
10.0
(Medium Low Set Point)
Cannot Compensate With Sub-Modulation (Bad Shifts). Adaptive logic stops
functioning
8.0
Low Voltage Fail Limit, Set Code, DNS
7.0
(Low Set Point)
Software Off (ECU loses power)
4.5
Neutral Start Off
CODE 13 XX ECU INPUT VOLTAGE (Figure 52)