Dtc P0706 Transmission Range Switch (Mode Switch) Performance - Isuzu 2000 Trooper Workshop Manual

7A1–30 TRANSMISSION CONTROL SYSTEM (4L30–E)

DTC P0706 Transmission Range Switch (Mode Switch) Performance

Circuit Description
 The range switch supplies the Powertrain Control
Module (PCM) with information regarding the selector
lever position: P, R, N, D, 3, 2 or L. The selector lever
position is indicated by the state of four ON/OFF
contacts. The range switch is located on one side of
the transmission. It is on the transmission manual
shaft and is fixed to the main case.
 The range switch is also used to provide the
information P or N to the engine crank wiring. The
engine can be cranked only if connector M–25
terminal 4(H) is connected to terminal 1(E) which is
connected to ground.
 The range switch is also used to provide the backup
lamp power in reverse. This is why the mode switch is
supplied through a 15A fuse (C–3). This fuse can
burn due to a shot circuit in the backup lamp.
 This DTC detects an invalid state of the range switch
or the range switch circuit by deciphering the range
switch inputs. This is a type "D" DTC.
Conditions For Setting The DTC
This DTC will set if any of the following conditions occurs:
Condition 1 ("R" bad position):
 Engine is running.
 No output speed DTCP0722, P0723.
 Output speed greater than 3,200 RPM.
 Range switch indicates "R".
 All conditions met for 4 seconds.
Condition 2 ("P" or "N" bad position):
 Engine is running.
 No TPS codes.
 Engine speed is less than 3,000 RPM.
 TP angle is greater than 20%.
 Range switch indicates "P" or "N".
 All conditions met for 4 seconds.
Action Taken When The DTC Sets
 Default to "D" position.
 The PCM will not illuminate the Malfunction Indicator
Lamp (MIL).
Conditions For Clearing The DTC
 The DTC can be cleared from the PCM history by
using a scan tool.
 The DTC will be cleared from history when the vehicle
has achieved 40 warmup cycles without a failure
reported.
 The PCM will cancel the DTC default actions when
the fault no longer exists and the ignition is cycled "off"
long enough to power down the PCM.
D07RY00011