2007 ISUZU KB P190 check engine

Automatic Transmission – 4L60E – Electrical Diagnosis Page 7C2–121
Step Action Yes No
4 Replace the TCM, refer to 7C4 Automatic Transmission – 4L60E –
On-vehicle Service
Did you complete the replacement? Go to Step 5 —
5 Perform the following procedure to verify the repair:
1 On Tech 2 select: Diagnostic Trouble Codes / Clear Engine & Transmission
DTCs
2 Follow the instructions on Tech 2 and clear any DTCs.
3 Drive the vehicle in D4.
4 On Tech 2 select:
Diagnostic Trouble Codes / Read DTC Information.
Has DTC P2770 set? Go to Step 2 Go to Step 6
6 On Tech 2 select:
Diagnostic Trouble Codes / Read DTC Information.
Does Tech 2 display any DTCs you have not diagnosed? Refer to
4.8 Diagnostic Trouble Code List System OK
When all diagnosis and repairs are completed, check the
system for correct operation.
4.37 DTC U0073 and U0100 – CAN-Bus No
Communication With ECM (Engine
Control Module)
DTC Description
This diagnostic procedure supports:
DTC U0073 – CAN-Bus No Communication W ith ECM (Engine Control Module)
DTC U0100 – CAN-Bus No Communication W ith ECM (Engine Control Module)
Circuit Description
The Transmission Control Module (TCM) communicates directly with the control modules connected to the GM LAN
serial data communication circuit through the GM LAN protocol. The first module that CAN-Bus is connected to is the
Engine Control Module (ECM).
DTC U0073 or DTC U0100 will set if communications between the TCM and ECM are lost.
Refer to 2 W iring Diagrams and Connector Chart to aid in diagnosis.
Conditions for Running the DTC
DTC U0073 and DTC U0101 runs continuously when the following conditions are met:
• The ignition is on for longer than 3 seconds.
• The ignition voltage is 10.0 – 16.0 V.
Conditions for Setting the DTC
DTC U0073
The TCM detects a short to ground between C-96 pin 7 and C-96 pin 49 within the specified time frame
DTC U0100
The TCM detects a short to ground between both C-96 pin 6 & 7 and C-96 pin 49 within the specifed time frame.

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

Automatic Transmission – 4L60E – Electrical Diagnosis Page 7C2–123
Step Action Yes No
2 1 Connect Tech 2 to the DLC.
2 Turn on the ignition, with the engine off.
NOTE
Before clearing the DTC, use the Tech 2 Freeze
Frame/Failure Record to record the transmission
parameters at the time the DTC set. Using Tech 2 to clear
the DTC(s) erases the Freeze Frame/Failure Record
records from the TCM.
3 On Tech 2 select: Transmission / Automatic Transmission / Diagnostic
Trouble Codes / Freeze Frame.
4 Select the relevant DTC and note the parameters at the time of the DTC setting.
5 On Tech 2 select:
Diagnostic Trouble Codes / Clear Engine & Transmission
DTCs.
6 Follow the instructions on Tech 2 and clear the DTCs.
7 Operate the vehicle within the conditions for running the DTC.
8 On Tech 2 select:
Diagnostic Trouble Codes / Read DTC Information.
Has either DTC PU0073 or DTC U0100 set? Go to Step 3 Check for an
intermittent fault in the circuit, refer to
8A Electrical-Body and Chassis
3 Using Tech 2, attempt to communicate with the PIM.
Does the PIM failed to communicate? Refer to the 6E1
Powertrain Interface Module – V6 Go to Step 4
4 Are DTCs also set in the PIM? Refer to 6E1
Powertrain Interface
Module – V6 Go to Step 5
5 Replace the TCM, refer to 7C4 Automatic Transmission – 4L60E –
On-vehicle Servicing.
Was the repair completed? Go to Step 6
—
6 1 Using Tech 2, clear the DTCs.
2 Switch off the ignition for 30 seconds.
3 Start the engine.
4 Operate the vehicle within the conditions for running the DTC.
Does any of the serial data communication circuit – TCM DTCs fail
this ignition cycle? Go to Step 2 Go to Step 78
7 Using Tech 2, select the DTC display function.
Does Tech 2 display any DTCs? Go to the
appropriate DTC Table System OK
When all diagnosis and repairs are completed, check the system for correct operation.


BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

Automatic Transmission – 4L60E – On-vehicle Servicing Page 7C4–7
NOTE
This will also flush the cooler hose/line
assemblies and cooler with transmission fluid.
7 If the flow rate is satisfactory, reconnect the cooler inlet line to the transmission, refer to 3.17 Transmission Cooler Line/Hose Assemblies.
8 Lower the vehicle, check and top up the transmission fluid to the correct level as required, refer to 2.1 Transmission Fluid.
Flow Rate Test

Do not run the engine any longer than
absolutely necessary, as a fluid level too low
can cause aeration and foaming.
1 Ensure the transmission fluid is at the recommended level or slightly above, refer to 2.1 Transmission Fluid.
2 Disconnect the cooler inlet line at the transmission quick-connect fitting, refer to 3.17 Transmission Cooler Line/Hose Assemblies.
3 Place a suitable size container underneath the disconnected cooler inlet line.
4 W ith the selector lever in the P position, start the engine and observe the fluid flow into the container after all the air bubbles have ceased and a steady flow is evident. Measure the flow rate over 20 seconds and ensure it is within
the specification.
Transmission fluid flow rate specification per 20 Seconds:
Temperature: Ambient ............................................................ 0.7 Litres 86° – 93° C ...................................................... 1.2 Litres
5 If the flow rate is less than the specification, the cause of the low flow rate must be located and rectified. Possible cause could include:
• restricted cooler within the radiator tank,
• kinked or damaged transmission cooler hose/line assemblies, or
• internal transmission fault such as a faulty pump.
6 Reinstall the cooler inlet line to the transmission quick-connect fitting, refer to 3.17 Transmission Cooler Line/Hose Assemblies.

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

Automatic Transmission – 4L60E – On-vehicle Servicing Page 7C4–16
8 Slide the cover (3) in the direction shown by the
arrow (1).
9 Using a small flat blade screwdriver, move the lock piece (4) from the position indicated by the arrow (2).
Continue to move the lock piece until the adjuster (5)
position begins to change.

Figure 7C4 – 12
10 Connect the selector cable to the transmission external manual shaft linkage.
11 Insert the lock piece in the adjuster to engage with the serrated cable end (cable length adjustment).
12 Slide the cover (1) on the adjuster and secure the lock piece.

Figure 7C4 – 13
13 Install the heat shield (7) and tighten the attaching screws (1 and 6) to the correct torque specification, refer to Figure 7C4 – 10.
Heat shield front attaching screw
torque specification ............................................ 25.0 Nm
Heat shield rear attaching screw torque specification ..............................................9.0 Nm
14 Move the selector lever to the P position and press the selector lever knob button five times.
15 Ensure the selector lever moves smoothly to each of its positions.
16 Check if the shift position indicated by the selector lever and the actual shift position are the same, rectify if required.
17 Lower the vehicle to the ground. Ensure the engine can only be started with the transmission selector lever in Park or Neutral position and the back-up lamps work correctly. If required, adjust the neutral start and back-up lamp
switch, refer to 3.4 Neutral Start and Back-up Lamp Switch.
18 Ensure the gear selection operates correctly.
19 Install the front and rear console, refer to 10 Cab.
3.4 Neutral Start and Back-up Lamp Switch
Remove
1 Position the transmission selector lever to the P position.
2 Raise the vehicle and support in a safe manner, refer to 0A General Information for the location of support points.

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

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

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

Automatic Transmission – 4L60E – On-vehicle Servicing Page 7C4–42
5 Carefully lower the rear of the transmission sufficiently to get access to the cooler lines.
6 Place a suitable sized drip tray underneath the transmission.
7 W ith the rear of the transmission lowered, disconnect the cooler lines from the transmission, as follows:
a Pull back the verifier disc (1) to release it and slide it back along the cooler line (2).
b Open the release tool, Tool No J-41623-B (3), slip it over the cooler line to be disconnected
from the transmission, ahead of the verifier disc.
c Slide the release tool along the cooler line and engage it with the quick-connect fitting (4).
d W hile pushing inwards, rotate clockwise the release tool about one sixth of a turn to release
the spring clip holding the cooler line.
e With the release tool held in this position, pull back on the cooler line to release it.
f Plug all openings to prevent fluid loss and/or contamination.
g Repeat this process with the remaining cooler line.
NOTE
If the spring clip and/or O-ring seal in the quick-
connect fitting is damaged during the removal
process, the complete fitting must be replaced.
Figure 7C4 – 60
8 Carefully remove the two cooler lines from the vehicle.
9 As required, separate the two cooler lines by removing the bracket and the two clips.
Reinstall
1 On the transmission end, ensure the spring clip and/or O-ring seal in each quick-connect fitting is not damaged, replace the complete fitting if required.
2 If required, fit the bracket and the two clips to attach the transmission two cooler lines together.
3 Position the cooler lines in place, attach the cooler line bracket (2) with the screw (1) hand tight to the right-hand side of the engine, refer to Figure 7C4 – 59.
4 Remove the plugs from the cooler lines and transmission fittings and wipe all exposed parts clean.
5 At the transmission end, smear the fluid lines rear fittings with clean automatic transmission fluid and push the quick-connect fittings together.

If the verifier disc does not clip into place, the
quick-connect fitting is not engaged, rectify
as required.
6 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
transmission quick-connect fitting.
7 Reinstall the transmission support, refer to 3.7 Transmission Support and Mount.
8 Remove the plugs from the cooler lines and radiator fittings and wipe all exposed parts clean.
9 At the radiator end, smear the fluid lines fittings with clean automatic transmission fluid and push the quick-connect fittings together, refer to Figure 7C4 – 58.

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

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.

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

Automatic Transmission – 4L60E – On-vehicle Servicing Page 7C4–46
Reinstall
1 If required on 4W D vehicle, reinstall the transfer case, refer to 7D Transfer Case and Adaptor Housing.
2 Ensure the transmission and the engine mating surfaces are clean and free of burrs.
3 Lubricate the torque converter spigot (7) with a small amount of high temperature wheel bearing grease, refer to Figure 7C4 – 62.
4 Install a new filler tube seal into the transmission case.

Support the transmission while installing the
attaching bolts to avoid damage to the torque
converter and flexplate. Do not have the
transmission hanging.
5 Bring the transmission up to the engine, inserting the filler tube and ensuring the locating dowels completely enter the torque converter housing.
6 Reconnect the breather hose to the top of the transmission case.
NOTE
The bolts attaching the torque converter housing
are facing forward except for the bolt in position ℑ

which is facing rearward.
7 With the transmission supported, install the bolt (1), nine places, attaching the torque converter housing to the engine and tighten to the correct torque specification following the sequence shown in
within Figure 7C4 – 62.
Torque converter housing attaching
bolt torque specification .......................... 52.0 – 66.0 Nm
8 Remove the access hole cover plate from the lower surface of the housing and push the torque converter forward to meet the flexplate, then hand start three new bolts (2) before tightening to the correct torque specification.
Reinstall the access hole cover plate.
Torque converter to flexplate attaching
bolt torque specification .......................... 60.0 – 70.0 Nm
9 Reinstall the bolt (3) and torque converter cover (4) on the transmission right-hand side and the bolt (5) and torque converter cover (6) on the transmission left-hand side, tighten the bolts to the correct torque specification.
Torque converter cover attaching
bolt torque specification .......................... 12.0 – 16.0 Nm
10 Reinstall the transmission fluid lines, refer to 3.17 Transmission Cooler Line/Hose Assemblies.

Prior to connecting the harness connector to
the transmission, check that all pins and
seals are in sound condition and the dust
boot is not torn or damaged.
11 Reconnect the transmission harness connector to the transmission as follows: a Push straight down on the connector body until a click is heard.
b Reinstall the dust boot ensuring it is correctly located.
12 Attach the harness clips to the right-hand and left-hand sides of the transmission case, refer to 12O Fuses, Relays and Wiring Harnesses.
13 On 4WD vehicle, connect the harness two clips from the upper side of the transfer case.

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007