CODE 62 XX -- RETARDER TEMPERATURE SENSOR

WTEC III ELECTRONIC CONTROLS TROUBLESHOOTING MANUAL

CODE 62 XX -- RETARDER TEMPERATURE SENSOR

8. If the condition continues to recur, 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 condition. If the original problem recurs, reinstall the replacement ECU.

Code 63 00 is set when one of the two inputs for an input function Auxiliary Function Range Inhibit (Special) is in

a different state (on or off) from the other input for longer than two minutes. When this condition is detected, code

63 00 is set. The transmission will not be inhibited in shifting from neutral to range.

Main

Code

Subcode

Meaning

Auxiliary Function Range Inhibit (Special) inputs states are different

Kickdown input failed on (software version 8 only)

Service brake status failed on

Pump/pack and a neutral general purpose input

Subcode 26 is set when this function (Kickdown) is selected by calibration, the calibration designated input is active

for a calibration time, and throttle position is less than the calibration value defined. The kickdown shift schedule is

inhibited when subcode 26 is active. The service indicator will be turned on if it is selected by the calibration. The

kickdown shift schedule is not inhibited, the code is cleared and the service indicator will be turned off if the

kickdown input remains inactive for the calibration time period while throttle position is less than the calibration

value. This diagnostic and code has been removed from software version 8A.

Subcode 40 is set when this function (Service Brake Status) is selected by calibration, and the specified input

remains active for a calibration number of consecutive acceleration events. The service indicator will be turned on

if it is selected by the calibration. A vehicle acceleration event is defined as an increase in transmission output

speed from 1 rpm to a calibration value. The operation of the Automatic Neutral For Refuse Packer will be limited

when this code is active. The active inhibit for this code is self-cleared and the service indicator will be turned off

if the designated input for the Service Brake Status function becomes inactive.

Subcode 41 is set when the states of the calibration inputs are different for a calibration number of consecutive

updates. The inputs in this case are Pump/Pack Enable and Automatic Neutral For Refuse Packer. The service

display will also be turned ON if selected by calibration.

Active Indicator Clearing Procedure:

Power down

Manual -- subcodes 26, 40, and 41

Self-clearing -- subcodes 26 and 40

Troubleshooting:

1. Code 63 00

a. Use the DDR to identify the two input wires programmed with Auxiliary Function Range

Inhibit (Special). Inspect the input wiring, connectors, and switches to determine why the input

states are different. Correct any problems which are found.

b. If the condition persists, 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 intermit-

tent condition. If the original problem recurs, reinstall the replacement ECU.

2. Code 63 26

Inspect kickdown switch circuit.

0021 00112