Models Affected: 2005-’06 Legacy, Outback, Impreza and Forester vehicles equipped with 4EAT
The purpose of this bulletin is to assist when diagnosing DTCs P0851 (Neutral
Switch Input Circuit Low) and P0852 Neutral Switch Input Circuit High). If you
encounter a vehicle with DTC P0851 and/or DTC P0852,
use the following repair procedure.
Repair Procedure/Information
Using the Subaru Select Monitor, check for diagnostic trouble codes stored in
memory. If DTC P0851 and/or DTC P0852
are stored in memory, adjust the inhibitor switch and select cable.
Note: Refer to the applicable Subaru service manual found on the STIS website
for component removal to gain access to the inhibitor switch and select cable.
It’s critical that the following adjustments are performed correctly.
Adjustment for inhibitor switch:
1. Set the select lever to “N” range.
2. Loosen the three inhibitor switch securing bolts.
3. Insert ST (special tool) 499267300 Stopper Pin as vertically as possible
into the holes in the inhibitor switch lever and switch body. See Figure 1.
4. Tighten the three inhibitor switch securing bolts, and then remove the
special tool.
Tightening torque: 3.4 Nm (2.5 ft.-lb.)
Adjustment for select cable:
1. With the select lever already in the “N” range, loosen adjusting nuts A and
B on both sides. See Figure 2.
2. Turn adjusting nut B until it lightly touches the connector. See
Figure 3.
3. Use a spanner wrench to hold nut B so that it does not rotate, and then
tighten adjusting nut A. See
Figure 4.
Tightening torque: 7.5 Nm (5.5 ft.-lb.)
4. After the completion of the adjustment, confirm that the select lever
operates normally at all ranges:
– Move the select lever from “P” to “D” range. Check that the detents could be
felt in each range. If the detents cannot be felt or the position pointer (dash
indicator) is improperly aligned, re-adjust the cable.
– Check if the starter motor rotates when the select lever is set to “P”
range.
– Check the back-up light illumination when the select lever is in “R” range.
– Check the parking lock operation when the select lever is in “F” range.
5. Clear the DTCs stored in memory.
If the codes return after the correct adjustments, refer to the diagnostic
procedure found in the applicable Subaru service manual.
Courtesy of Mitchell 1.
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