Table 53. Voltage Chart

WTEC III ELECTRONIC CONTROLS TROUBLESHOOTING MANUAL

CODE 13 XX -- ECU INOSTICOLTDES (Figure 52)

DIAG NPU V CO AGE

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 Fail Limit

(High Set Point)

32.0

Maximum Continuous ECU Voltage

10.0

Cannot Compensate With Sub-Modulation (Bad Shifts). Adaptive logic stops

(Medium Low Set Point) functioning

8.0

Low Voltage Fail Limit, Set Code, DNS

7.0

Software Off (ECU loses power)

(Low Set Point)

4.5

Neutral Start Off

0021 0051