2007 ISUZU KB P190 Neutral switch

Automatic Transmission – 4L60E – On-vehicle Servicing Page 7C4–18

Ensure the four wheels are off the ground
before performing the starting test.
4 W ith the ignition switched to the ON position, check if the engine can only be started in the Park and Neutral shift selector positions and ensure the back-up lamps illuminate when Reverse is selected. A further minor adjustment
may be required to achieve this state.
NOTE
To gain access to the rear attaching screw (11) it
will be necessary to remove the connector.
5 After the switch has been adjusted, tighten the rear attaching screw (11) to the correct torque specification. Neutral start and back-up lamp switch
attaching screw torque specification .................. 25.0 Nm
6 Reinstall the connector and the CPA securing pin.
7 Remove the switch front attaching screw (1).
8 Install the heat shield (3) and tighten the attaching screws (1 and 2) to the correct torque specification.
Heat shield front attaching screw
torque specification ............................................ 25.0 Nm
Heat shield rear attaching screw torque specification ..............................................9.0 Nm
9 Lower the vehicle to the ground and re-check the operation of the neutral start and back-up lamp switch. The vehicle must start only with the shift selector in the Park or Neutral positions and the back-up lamps should only
illuminate when Reverse is selected.
3.5 Vehicle Speed Sensor
NOTE
For the speed sensor fitted to four wheel drive
vehicles (4WD), refer to 7D Transfer Case and
Adaptor Housing.
Remove
1 Raise the vehicle and support in a safe manner, refer
to 0A General Information for the location of support
points.
2 Disconnect connector (1) from the vehicle speed sensor (2).
3 Remove the bolt (3) attaching the speed sensor to the transmission extension housing.
4 With a pulling and turning motion, remove the speed sensor and O-ring seal (4) from the transmission
extension housing, discard the O-ring.
Figure 7C4 – 15

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Automatic Transmission – 4L60E – On-vehicle Servicing Page 7C4–19
Reinstall
1 Lubricate a new O-ring seal with petroleum jelly and install it to the vehicle speed sensor.
2 Install the speed sensor to the transmission extension housing.
3 Install the attaching bolt and tighten to the correct torque specification.
Vehicle speed sensor attaching bolt
torque specification ............................................ 12.0 Nm
4 Connect the connector to the speed sensor.
5 Lower the vehicle to the ground.
3.6 Manual Shaft Oil Seal
Replace
NOTE
This procedure requires the use of special tool
No. AU583.
1 Raise the vehicle and support in a safe manner, refer to 0A General Information for the location of support points.
2 Remove the neutral start and back-up lamp switch, refer to 3.4 Neutral Start and Back-up Lamp Switch.
3 Assemble the seal remover, Tool No. AU583-3 (1) by installing the remover nut, Tool No. AU583-4 (2) with
its threaded inner diameter closest to the hexagonal
head of the seal remover tool. Install the nut up to the
hexagonal head.
4 Install the assembled seal remover tool over the manual shaft (3) engaging the tapered thread end (4)
into the seal.

Do not over tighten the seal remover tool in
the seal.
5 Rotate the hexagonal head of the seal remover tool clockwise, until the thread grips the steel shell of the
seal.
Figure 7C4 – 16
6 W hile holding the hexagonal head of the seal remover tool (1) rotate the remover nut (2) clockwise, until it
contacts the transmission case.
7 Continue rotating the remover nut until the seal is pulled into the remover nut cavity.
8 Remove and discard the seal.
Figure 7C4 – 17

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Automatic Transmission – 4L60E – On-vehicle Servicing Page 7C4–20
9 Install the seal protector, Tool No. AU583-1 (1) into
one of the two plastic seal installers, Tool No.
AU583-2 (2).
NOTE
Two plastic seal installers are required because
of the restricted space between the end of the
manual shaft and the floor pan.
10 Lubricate the lip of a new seal (3) with clean automatic transmission fluid and install it over the seal protector
sleeve, with the steel casing facing the installer tool.
11 Install the seal protector with the new seal and installer tool over the manual shaft (4) and up to the
transmission case.

If the seal protector sleeve jams on the
manual shaft, the flats on the shaft locating
the selector lever will be burred. Use a fine
file to remove any burrs and then proceed.
12 Fit the second plastic seal installer over the manual shaft until it seats against the first installer.
13 Install the manual shaft linkage attaching nut (5) and tighten it to drive the seal in position into the
transmission case.
14 Remove the seal installer and protector tools from the manual shaft.
Figure 7C4 – 18
15 Reinstall the neutral start and back-up lamp switch, refer to 3.4 Neutral Start and Back-up Lamp Switch.
16 Lower the vehicle to the ground and as required, check and top up the automatic transmission fluid level, refer to 2.1 Transmission Fluid.
3.7 Transmission Support and Mount
Remove
1 Raise the vehicle and support in a safe manner, refer to 0A General Information for the location of support points.
2 Support the transmission with a Jack, do not place the support underneath the extension housing or the oil pan, refer to Figure 7C4 – 19.
3 Remove the clip (1) holding the fuel feed and fuel vapour lines on the transmission support (2).
4 Remove the bolt (3) attaching the heat shield (4) to the transmission support.
5 Remove the two nuts (5) attaching the transmission mount to the support.
6 Remove the four bolts and nuts (6) attaching the transmission support to the under body side rails and remove the support.
7 If required, remove the two bolts (7) attaching the transmission mount (8) to the extension housing and remove the mount.

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Automatic Transmission – 4L60E – On-vehicle Servicing Page 7C4–43

If the verifier disc does not clip into place, the
quick-connect fitting is not engaged, rectify
as required.
10 As a security check, push and clip each verification disc into place over the quick-connect fittings. If difficulty is experienced, repeat the installation process until the verification disc can be clipped into place over the radiator
quick-connect fitting.
11 Snap the outlet cooler line (4) in the clip (5) of the radiator fan shroud.
12 Ensure the routeing of the cooler lines is correct and there is no fouling of the lines.
13 Tighten the screw attaching the cooler lines bracket to the correct torque specifications.
Transmission cooler lines bracket
attaching screw torque specification .................. 23.0 Nm
14 If required, top up the transmission fluid level (cold).
15 Start the engine and check for any fluid leak at the fittings. If a leak is found, stop the engine and rectify the leak.
16 Check and top up the transmission fluid to the correct level as required, refer to 2.1 Transmission Fluid.
3.18 Transmission Assembly
Remove

Disconnection of the battery affects certain
vehicle electronic systems. Refer to 6D1-3
Battery, before disconnecting the battery.
1 Disconnect the battery ground lead.
2 Raise the vehicle and support in a safe manner, refer to 0A General Information for the location of support points.
3 Remove the heat shield from the neutral start and back-up lamp switch, gently prise the selector cable from the transmission external manual shaft linkage and remove the selector cable from the bracket, refer to
3.3 Selector Cable Assembly.
4 Disconnect the harness connectors from the following:
a Vehicle speed sensor, refer to 3.5 Vehicle Speed Sensor.
b Neutral start and back-up switch, refer to 3.4 Neutral Start and Back-up Lamp Switch.
c For the following on four wheel drive vehicles (4W D), refer to 7D Transfer Case and Adaptor Housing:
• neutral switch,
• 2WD – 4WD shift actuator switch,
• speed sensor.
NOTE
If the battery is connected, avoid turning the
ignition switch to the ON position, as the transfer
case control module (TTCM) must first be
removed (memory to be cleared as Check 4W D
Indicator will light).
5 Remove the following components: a Front and centre exhaust assemblies, refer to 6F Exhaust System.

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Automatic Transmission – 4L60E – On-vehicle Servicing Page 7C4–47
14 Reconnect the fuel and EVAP pipes three brackets and clips, refer to 6C Fuel System – V6.
15 Reinstall the following components:
a Starter motor, refer to 6D1-2 Starting System.
b Transmission support, refer to 3.7 Transmission Support and Mount.
c Front and centre exhaust assemblies, refer to 6F Exhaust System.
d Rear propeller shaft and for 4WD front propeller shaft, refer to 4A Propeller Shaft.
16 Reconnect the harness connectors to the following: a Vehicle speed sensor, refer to 3.5 Vehicle Speed Sensor.
b Neutral start and back-up switch, refer to 3.4 Neutral Start and Back-up Lamp Switch.
c For the following on 4W D vehicles, refer to 7D Transfer Case and Adaptor Housing:
• neutral switch,
• 2WD – 4WD shift actuator switch,
• speed sensor.
17 Reinstall the selector cable to the transmission external manual shaft linkage, secure the selector cable to the bracket and attach the heat shield to the neutral start and back-up lamp switch, refer to 3.3 Selector Cable
Assembly.
18 Perform a reverse flush of the cooler lines and a flow rate test, refer to 2.2 Reverse Flush and Flow Rate, if either of the following applies:
• the transmission fluid is contaminated,
• the transmission has been replaced,
• the torque converter has been replaced, or
• the transmission oil pump has been replaced.
19 Lower the vehicle to the ground.
20 If required, top up the transmission fluid level (cold).
21 Reconnect the battery ground lead.
22 Start the engine and check for any fluid leaking at the fittings. If a leak is found, stop the engine and rectify the leak.
23 Road test until the transmission has reached operating temperature. Re-check the fluid level and for any fluid leaks, refer to 2.1 Transmission Fluid.
3.19 Transmission Control Module
Remove
1 Ensure the ignition switch is in the OFF position.
2 Disconnect the connector (1) from the transmission control module (TCM) (2) as follows, refer to Figure 7C4 – 63: a remove the securing pin (3),
b press the locking tab and swing the lever (4) to free the connector,
c remove the connector.
3 Remove the four bolts (5) and nuts (6), then the TCM from the mounting bracket (7).
4 If required, remove the two nuts (8) and the mounting bracket from the firewall.

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TRANSMISSION CONTROL SYSTEM (AW30–40LE) 7A2-9
TCM Voltage & Resistance Check Sheet
CHECK ITEM PIN No. VALUE NOTE
VIGN C-94: 6–1 VIGN Key “ON”
Backup Power Supply C-94: 24–1 +B (Always) Key “ON”
Neutral Start Switch P “P” Position VIGN Key “ON”
Except “P” 0V
Neutral Start Switch R C-95: 1–C-94: 1 “R” Position VIGN Key “ON”
Except “R” 0V
Neutral Start Switch N C-95: 8–C-94: 1 “N” Position VIGN Key “ON”
Except “N” 0V
Neutral Start Switch D C95: 7–C-94: 1 “D” Position VIGN Key “ON”
Except “D” 0V
Neutral Start Switch 2 C-95: 19–C-94: 1 “2” Position VIGN Key “ON”
Except “2” 0V
Neutral Start Switch 1 C-95: 18–C-94: 1 “1” Position VIGN Key “ON”
Except “1” 0V
Neutral Start Switch 3 C-95: 9–C-94: 1 “3” Position VIGN Key “ON”
Except “3” 0V
Power SW C-95: 13–C-94: 1 “ON” 0V Key “ON”
“OFF” VIGN
3rd Start SW C-95: 4–C-94: 1 “ON” 0V Key “ON”
“OFF” VIGN
Brake SW C-95: 22–C-94: 1 “ON” VIGN Key “ON”
“OFF” 0V
AT Oil Temperature
Sensor C-94: 11–12 20
°C/68 °F 4.6V Engine run.
155°C/311 °F 1.1V
4L Signal C-95: 21–C-94: 1 4L 0V Key “ON”
2H/4H VIGN
Diag SW C-95: 12–C-94: 1 “ON” VIGN Key “ON”
“OFF” 0V
Shift Solenoid A (S1) C-94: 16–1 P VIGN Engine run.
R VIGN
N VIGN
D–1 VIGN
D–2 VIGN
D–3 0V
D–4 0V

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7A2-24 TRANSMISSION CONTROL SYSTEM (AW30–40LE)
TRANSMISSION DATA
Scan Tool Parameter Units Displayed Typical Data Value at Engine Idle
Operating Conditions: Engine idling/ Engine coolant temperature is between 75 to 85 °C(167 to 185 °F)/
Accelerator pedal is constant/ Neutral or Park/ Accessories OFF/ Vehicle located at sea level
Engine Coolant temperature °C/ °F 75 to 85°C (167 to 185 °F)
Engine Speed RPM 700
Vehicle Speed Km/h / MPH 0
Ignition Voltage V 13.6
Accelerator Pedal Position Signal % 0
Throttle Position % 0
Accelerator Pedal Position Signal
During Cruise Control % 0
Cruise Control
Inactive / Active Inactive
Cruise Control OD Cancel Request ON / OFF OFF
Engine W arm Up Cycle Achieved FALSE / TRUE FALSE
Transmission Shift in Progress Inactive / Active Inactive
Garage Shift Control Inactive / Active Inactive
MIL Request Command ON / OFF OFF
Transmission Check Light ON / OFF OFF
Transmission Oil Temperature Lamp ON / OFF OFF
Power Drive Lamp ON / OFF OFF
3rd Start Lamp ON / OFF OFF
Transmission Fluid Temperature
°C/ °F 70 to 80°C (158 to 176 °F)
AT Input Speed RPM 625
AT Output Speed RPM 0
Transmission Range Park / Reverse /
Neutral / Drive 4 / Drive 3 / Drive 2 / Drive 1 Park
TR Switch P
ON / OFF ON
TR Switch R ON / OFF OFF
TR Switch N ON / OFF OFF
TR Switch D ON / OFF OFF
TR Switch 3 ON / OFF OFF
TR Switch 2 ON / OFF OFF
TR Switch L ON / OFF OFF
Diagnostic Switch Open / Close Open
Brake Pedal Switch ON / OFF OFF
Power Drive Switch ON / OFF OFF
3rd Start Switch ON / OFF OFF
4 W heel Drive Low ON / OFF OFF
Shift Solenoid 1 Command ON / OFF ON
Shift Solenoid 2 Command ON / OFF OFF
TCC Solenoid Engaged / Disengaged Disengaged
Downhill Mode Inactive / Active Inactive
Active Shift Mode Normal Mode /
Power Mode /
3rd Gear Start /
Transfer 4L MODE Hot 1 / Hot 2 /
UPHILL MODE 1 /
UPHILL MODE 2 / Cruise MODE /
W arm Up MODE Normal Mode
Estimated Gear Ratio
:1 7.97 : 1

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TRANSMISSION CONTROL SYSTEM (AW30–40LE) 7A2-45

DTC P0707 or P0708 (Flash Code 17)



RTW 77ALF001401

Circuit Description
The neutral start switch gives the signals related to the
selector lever position (PRND32L) to the Transmission
Control Module (TCM). The neutral start switch turns on
when the select lever is shifted to the P, R, N, D, 3, 2 o
r
L position. The neutral start switch, which is connected
to the starter switch circuit, is available only when the
select lever is in the P or N position (Engine run).
The neutral start switch is connected to the
transmission manual shaft and mounted on the
transmission case.

Condition For Running The DTC
All of the following conditions are met.
(1) All of the following conditions are met for 2 seconds or more continuously.
• The supply voltage is more than 10.2 volts and
less than 15.5 volts.
• DTC U2104 is not detecting failure or not
deciding failure.
• DTC U2105 is not detecting failure or not
deciding failure.
• Engine revolution signal is not detecting failure
or not deciding failure.
• The engine revolution is more than 550rpm.

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