Active Indicator Clearing Procedure - TM-9-2320-303-24-10225

WTEC III ELECTRONIC CONTROLS TROUBLESHOOTING MANUAL

CODE 14 XX -- DIAGNOSTIC ENSOR (OLS) (Figure 53)

OIL LEVEL S CODES

The oil level sensor (OLS) must have been recognized by autodetect or manually selected using the Pro-Link

(see WTEC III Pro-Link Manual) before these codes can be logged.

Code 14 12 indicates the ECU has detected a voltage signal in the low error zone.

Code 14 12 can be caused by:

Faulty wiring to the OLS

A faulty OLS

A faulty ECU

Never use a volt/ohmmeter to measure any parameters on the OLS. Damage to the OLS

CAUTION:

will result.

OLS ground wire 135B is common to the TPS and the RMR devices. A power wire short-to-ground for any of

these devices will cause "sensor failed low" codes (21 12 and 64 12) and shutdown of the electronic pushbutton or

lever selector. An OLS signal open or short-to-ground results in a code 14 12 only. Code 14 23 is programmed out

A permanent maximum voltage signal generates a steady OLS sensor maximum count and a maximum fluid level

overfill indication. A maximum overfill indication occurs if signal wire 165 or power wire 124 is shorted to battery

or the ground wire (wire 135) is open between the OLS and the sump temperature sensor branch. An open in the

ground circuit wire 135 in the portion common to the OLS, TPS and RMR devices results in code 14 12, 21 23, and

64 23.

If the ECU software supports it, Oil Level Sensor counts can be read by a DDR with Pro-Link version 3.0 (or

later). For a complete description of fluid level checking procedures using the oil level sensor, see Section 5.

Normal operation of the OLS can be checked as follows: Attach the DDR and display OIL LEVEL COUNTS.

Read the number of counts when the engine is not running, but the ignition is ON. The count reading should be

near 255. Start the engine and observe the counts. In normal operation, the count should be 100200 because the oil

level drops when the engine starts and oil from the sump is delivered to other parts of the transmission.

NOTE:

Intermittent connections or lack of battery-direct power and ground connections can cause this and

other electronic control codes.

Main

Code

Subcode

Meaning

Oil level sensor failed low

Oil level sensor failed high (not used)

Active Indicator Clearing Procedure:

Power down

Manual

Self-clearing

0021 0053