Active Indicator Clearing Procedure - TM-9-2320-303-24-10222

WTEC III ELECTRONIC CONTROLS TROUBLESHOOTING MANUAL

CODE 13 XXAGNOUTNPCODES TAGE (Figure 52)

DI -- EC S I IC UT VOL

Main code 13 indicates either a high or low input voltage. Low voltage is less than 8 volts. High voltage is over 33

volts.

Common causes for a low voltage code are:

Bad batteries

Faulty vehicle charging system

No dedicated power and ground connection directly to the battery or through an electronic bus bar to the

battery

Common causes for the high voltage code are:

Faulty vehicle alternator

Faulty vehicle voltage regulator

In the event of a power loss, the transmission fails to the ranges indicated in the following, depending upon which

latch valve releases first:

Attained Range

Fail to Range

Reverse and neutral

Neutral

Low, 1

2, 3, 4

4C usually, 3C sometimes

4C usually, 5C sometimes

Main Code

Subcode

Meaning

Battery voltage to the ECU too low

Battery voltage to the ECU too low (medium)

Battery voltage to the ECU too high

Active Indicator Clearing Procedure:

Power down

Manual

Self-clearing

Troubleshooting:

1. Connect the diagnostic tool and turn on vehicle ignition. Select Diagnostic Data to find input

voltage. Record reading.

2. Turn off vehicle ignition and remove the connectors from the ECU.

3. Check system voltage at wire 136A and 136C, pin V1 and V16. If power is low or high at this

point, and the diagnostic tool reading is also low or high, the vehicle wiring is suspect. Check for

fuse problems, lack of battery-direct power and ground, faulty charging system/batteries, and loose

or dirty connections (see Appendix A). Power may also be low or high at pins V1 and V16 (system

power) if the batteries/charging system is faulty. Bad grounds may also cause incorrect input

power readings.

0021 0050