SHIFT MODE SELECTOR SWITCH
The Shift Mode Selector Switch allows the operator to
select a Normal or Performance (aggressive) shift
schedule. The switch is mounted on the console near the
selector lever.
Initial shifts after a cold start are completed in the Normal
mode even if the Performance is selected. Performance
shift schedule timing and pressures are based on learned
Normal mode shift characteristics.
The Norm/Perf switch is a simple On/Off switch. The
signal to the PCM (Connector J3 Terminal E3) is pulled up
to 12 volts by the PCM when the Norm/Perf switch is open
indicating that the Normal mode has been selected (See
Figure 37). When the Performance mode is selected, the
PCM circuit will be pulled to ground. This voltage drop
indicates to the PCM that the Performance mode has been
selected by the operator. When the switch is placed back
into the Normal mode, the circuit is opened and the PCM
pin will be back to battery voltage and once again indicate
that the Normal range has been selected.
The Light Emitting Diode (LED) shown in Figure 37
illuminates when the Performance mode is selected due to
the switch being closed completing a circuit from terminal
C to B.
Power is turned on at terminal A whenever the Courtesy
light or Head lights are turned on. This circuit completes to
ground at terminal B causing the bulb to illuminate the
words Norm/Perf on the face of the switch.
C
D
B
A
.
.
.
.
5 amp
DIM FUSE
PNK/BLK
BLACK
PINK
PCM
J3-E3
10 amp
IGN 1 FUSE
GRAY
LIGHT BULB FOR
NIGHT ILLUMINATION
PERFORMANCE MODE
INDICATOR LIGHT
EMITTING DIODE
(LED)
SHIFT MODE SELECTOR SWITCH
Figure 37
A
B
C
D
Figure 38
NORM/PERF SWITCH CONN. VIEW
If a malfunction occurs in the Norm/Perf electrical circuit,
the operation of the switch can be easily checked with the
use of a DVOM in the following manner:
1) Set the meter to ohms.
2) Place the positive lead to terminal A (See Figure 38).
3) Place the negative lead to terminal B. Approximately
17.5 ohms should be seen.
4) Place the switch into the Performance mode.
5) With the positive lead of the meter still on terminal
A, place the negative lead onto terminal D.
Approximately 17.5 ohms should be seen. Keeping
the leads on these two pins, place the switch to the
Normal mode. The meter should read open.
6) Next, keep the negative lead on D and place the
positive lead onto the B terminal and place the switch
in the Performance mode. Approximately 0.7 ohms
should be seen.
7) Place a 12 volt supply to terminal C and ground
terminal D. If the LED lights up, the diode and
resistor combination is working correctly. If the LED
does not light up, replace the switch.
If any part of the above test failed, replace the switch. If
every step of the above test passed, there is an external
wiring problem in the vehicle.
27
AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information