DIAGNOSTIC CODES - TM-9-2320-303-24-10206

WTEC III ELECTRONIC CONTROLS TROUBLESHOOTING MANUAL

DIAGNOSTIC CODES

The diagnostic display mode may be entered for viewing of codes at any speed. Active codes can only be cleared

when the output speed = 0 and no output speed sensor failure is active.

Reading Codes. Enter the diagnostic display mode by pressing the ⇑ (Up) and ⇓ (Down) arrow

buttons at the same time on a pushbutton selector, or by momentarily pressing the "display mode"

button on a lever shift selector.

NOTE:

If a DO NOT SHIFT condition is present (CHECK TRANS light illuminated) at this time, the shift

selector may or may not respond to requested range changes.

NOTE:

If an oil level sensor is present, then fluid level will be displayed first. Diagnostic code display is

achieved by simultaneously depressing the ⇑ (Up) and ⇓ (Down) arrow buttons a second time or the

"display mode" button a second time.

The code list or queue position is the first item displayed, followed by the main code and the subcode. Each item is

displayed for about one second. The display cycles continuously until the next code list position is accessed by

pressing the MODE button. The following list represents the display cycle using code 25 11 as an example:

1. Code list position -- d, 1

2. Main code -- 2, 5

3. Subcode --1, 1

4. Cycle repeats -- d, 1, 2, 5, 1, 1

To view the second, third, fourth, and fifth positions (d2, d3, d4, and d5), momentarily press the MODE button as

explained above.

Momentarily press the MODE button after the fifth position is displayed to restart the sequence of code list

positions.

An active code is indicated by the illumination of the LED indicator when a code position is displayed while in the

diagnostic display mode. In the normal operating mode, the LED indicator illuminates to show a secondary mode

operation.

Any code position which does not have a diagnostic code logged will display "" for both the main and subcodes.

No diagnostic codes are logged after an empty code position.

Clearing Active Indicators. A diagnostic code's active indicator can be cleared, which allows the

code inhibit to be cleared but remains in the queue as inactive.

The active indicator clearing methods are:

1. Power down -- All active indicators, except code 69 34 (refer to the code chart), are cleared at

ECU power down.

2. Self-clearing -- Some codes will clear their active indicator when the condition causing the code

is no longer detected by the ECU.

0021 0034