Section 07-14A: Manual Lever Position Sensor
1994 Mustang Workshop Manual
DIAGNOSIS AND TESTING

Pinpoint Tests

If DTCs are present while performing the On-Board Diagnostic, refer to the On-Board Diagnostic Trouble Code Description Chart for the appropriate service procedure.

NOTE: Prior to entering Pinpoint Tests, refer to any TSBs and OASIS messages for transmission concerns.

NOTE: Prior to entering Pinpoint Tests, the vehicle harness must be checked for continuity and shorts; the powertrain control module (PCM) (12A650) must be checked for any concerns. Refer to the Powertrain Control/Emissions Diagnosis Manual for proper procedures.

NOTE: If any non-transmission DTCs appear, service those codes first. They could affect the electrical operation of the transmission. Record and erase codes from continuous memory after service has been performed. After servicing any DTCs in the Quick Test, the Quick Test should be repeated.

NOTE: Check powertrain control module wiring harness for proper connections, bent or broken pins, corrosion, loose wires, proper routing, proper seals and their condition. Check the powertrain control module , sensors and actuators for physical damage.



On-Board Diagnostic Trouble Code Description Chart
4 Digit DTCa 3 Digit DTCb Component Description Condition Symptom Reference / Action
P1709 522 MLP MLP not in PARK Self test not run in PARK. Rerun self test in PARK. Refer to Pinpoint Tests.
P1709 634 MLP MLP out of range Indicated voltage drop across MLP sensor exceeds limits established for each position. Misadjusted sensor. Harsh engagements, firm shift feel, no crank in NEUTRAL, improper shifts. Refer to Pinpoint Tests.
P1705 654 MLP MLP not indicating PARK during KOEO Self-test not run in PARK Rerun self-test in PARK Refer to Pinpoint Tests.
P1706 659 MLP MLP indicating PARK during operation MLP sensor indicating PARK during operation. EPC pressure high, all shifts firm. Refer to Pinpoint Tests.
P0707 667 MLP MLP circuit below minimum voltage MLP sensor, circuit or PCM shorted or grounded. Increase in EPC pressure. Refer to Pinpoint Tests.
P0708 668 MLP MLP circuit above maximum voltage MLP sensor, circuit or PCM indicates open. Increase in EPC pressure. Refer to Pinpoint Tests.
P0705 675 MLP MLP circuit voltage out of range MLP sensor, circuit or PCM operating erratically. Increase in EPC pressure. Refer to Pinpoint Tests.
a Applies to vehicles equipped with 3.8L engine (OBDII).
b Applies to vehicles equipped with 5.0L engine (OBDI).

This Pinpoint Test is designed to diagnose the Manual Lever Position (MLP) Sensor electrical system ONLY. To prevent replacement of good components, note that the following areas may be at fault:

This Pinpoint Test is designed to diagnose the following components:

Refer to the following schematic and charts when performing the Pinpoint Test steps.





Pin Number Circuit Circuit Function
1 32 (R/LB) Starter Control
2 294 (W/LB) Fused Run Only Feed
3 140 (BK/PK) Back-up Lamp
4 33 (W/PK) Starter Control to Control Module
5 — Not Used
6 199 (LB/Y) Manual Lever Position Sensor to PCM
7 359 (GY/R) Sensor Signal Return
8 — Not Used



Manual Lever Position (MLP) Sensor Testing Procedure 11






To Test Connect Self-Powered Test Lamp or Ohmmeter to Terminals Move Switch to These Positions A Good Switch Will Indicate
Transmission Circuit 359 (GY/R)
and
199 (LB/Y)		 Park
Reverse
Neutral
Overdrive
Second (2)
First (1)		 3770-4607 ohms
1304-1593 ohms
660-807 ohms
361-442 ohms
190-232 ohms
78-95 ohms
Backup Lamp Circuit 298 (P/O)
and
140 (BK/PK)		 Park
Reverse
Neutral
Overdrive
Second (2)
First (1)		 Greater than 100K ohms
Less than 5.0 ohms
Greater than 100K ohms
Greater than 100K ohms
Greater than 100K ohms
Greater than 100K ohms
Starter Relay Circuit 33 (W/PK)
and
32 (R/LB)		 Park
Reverse
Neutral
Overdrive
Second (2)
First (1)		 Less than 5.0 ohms
Greater than 100K ohms
Less than 5.0 ohms
Greater than 100K ohms
Greater than 100K ohms
Greater than 100K ohms