Manual Transmission

Neutral Switch Circuit:

A faulty neutral switch will set code 51 in the on-board diagnostic system. Refer to the schematic diagram and test the switch with the diagnostic chart.

Wire color code identification:

L: Blue
B: Black
Y: Yellow
G: Green
R: Red
W: White
Br: Brown
Lg: Light green
Gr: Gray

Diagnostic Chart:

NEUTRAL SWITCH DIAGNOSTIC CHART

Neutral Switch Connector:

CHECK ECU VOLTAGE

With ignition "ON," measure voltage between ECU connector terminal and ground as follows:

Connector & terminal: Voltage: [1]
(B58)10-Ground 0V (neutral position)

CHECK NEUTRAL SWITCH

1. Disconnect transmission connectors.
2. Measure resistance between neutral switch terminals while shifting select lever from "N" to any other position:

Connector & terminal: Resistance:
(E15)1-(E15)3 0 Ohms ("N" range)
1M Ohms min. (other than "N" range)

CHECK HARNESS BETWEEN ECU AND NEUTRAL SWITCH

1. Disconnect ECU and neutral switch connectors.
2. Measure resistance between ECU and neutral switch connectors and ground as follows:

Connector & terminal: Resistance:
(B58)10-(E17)1 0 Ohms
(E17)1-Ground 1M Ohms min.
(E17)2-Ground 0 Ohms