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Automatic Transmission – 4L60E – On-vehicle Servicing Page 7C4–5
2 Maintenance Operations
2.1 Transmission Fluid
When adding or changing the transmission fluid, use only the recommended automatic transmission fluid, refer to
0B Maintenance and Lubrication.
For the automatic transmission fluid diagnosis, refer to 7C3 Automatic Transmission – 4L60E – Hydraulic and
Mechanical Diagnosis.
Transmission Fluid Colour
New transmission fluid is red in colour due to a dye that is added to the fluid so it can be distinguished from other oils and
lubricants. The red dye is not permanent and as such, is not an indicator of the quality of the fluid.
As the vehicle is driven the transmission fluid will quickly look darker in colour and appear to be a light brown. A dark
brown colour with a distinctively burnt odour may indicate fluid deterioration and the need for fluid replacement.
NOTE
A dark brown fluid colour observed, coupled with
a reported delayed shift pattern may only indicate
that fluid replacement is required. This is not a
definite indication of a potential transmission
failure.
Transmission Fluid Level
NOTE
Carry out this operation with the transmission at
normal operating temperature (82 – 94°C), as the
temperature greatly affects the fluid level.
1 Drive the vehicle for a distance of at least 25 km to bring the transmission up to normal operating temperature.

If the transmission is not at normal operating
temperature and the correct procedure is not
followed, the result could be a false reading of
the fluid level on the transmission fluid
indicator.
2 If the vehicle has been operated under any of the following conditions, switch the engine off and allow the transmission to cool for approximately thirty minutes:
• in high ambient temperatures above 32° C,
• at sustained high speeds,
• in heavy stop / start city traffic during hot weather, or
• towing.
3 Park the vehicle on level ground.
4 Move the gear selector to the Park position and apply the park brake.
5 Allow the engine to idle for 3 minutes with the accessories turned off.

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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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ON-VEHICLE SERVICE (AW30–40LE) 7A3-11
Measure Time Lag
1. Fully apply the parking brake.
2. Start the engine. Check idling speed (A/C OFF).
3. Operate the select lever from “N" to “D" position.
Using a stopwatch, measure the time it takes from
shifting the lever until the shock is felt.
Time lag: Less than 0.7 seconds
4. In same manner, measure the time lag for “N" →
“R".
Time lag: Less than 1.2 seconds
Evaluation
1. If “N" → “D" time lag is longer than specified:
• Line pressure too low
• Forward clutch malfunction
• No.2 one-way clutch not operating properly
2. If “N" → “R" time lag is longer than specified:
• Line pressure too low
• Direct clutch malfunction
• First and Reverse brake malfunction
3. If both time lag is longer than specified:
• Line pressure too low

Hydraulic Test






RTW 67ALH000201
Preparation
1. W arm up the transmission fluid.
2. Remove the transmission case test plug and mount the hydraulic pressure gauge.
Oil pressure gauge: 5-8840-0093-0
NOTE: Perform the test at normal operating fluid
temperature (50 – 80 °C or 122 – 176 °F).




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ON-VEHICLE SERVICE (AW30–40LE) 7A3-15
“L" Position Test
1. W hile running above 80 km/h (50 mph) in the “D"
position, release your foot from the accelerato
r
pedal and shift into the “L" position.
Then check to see that the 2 →1 downshift occurs at
the specified point shown on the automatic shift
diagram.




RUW 37ASH000601
2. W hile running in the “L" position, check to see that
there is no upshift to 2nd gear.
3. W hile running in the “L" position, release the accelerator pedal and check the engine braking
effect.
4. Check for abnormal noise during acceleration and deceleration.








RUW 37ASH000701

“R" Position Test
Select into the “R" position and, while starting at full
throttle, check for slipping.





RUW 37ASH000801
“P" Position Test
Stop the vehicle on a grade (more than 9%) and afte
r
shifting into the “P" position, release the parking brake.
Then check to see that the parking lock pawl holds the
vehicle in place.



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TRANSMISSION CONTROL SYSTEM (JR405E) 7A2-1
TRANSMISSION
TRANSMISSION CONTROL SYSTEM (JR405E)
This manual conforms when Scan Tool of ISO CAN Base Software is used.
TABLE OF CONTENTS
Specifications ...................................................... 7A2-2Transmission General Specifications ............... 7A2-2
Transmission Fluid Temperature vs. Resistance..... 7A2-3
Clutch, Brake, Solenoid and Pressure Switch Logic........ 7A2-4
Diagnostic Trouble Code (DTC) List ................ 7A2-5
Schematic and Routing Diagrams....................... 7A2-6 Transmission Controls Schematics .................. 7A2-6
Component Locator........................................... 7A2-13 Transmission Controls Component Views ..... 7A2-13
Transmission Control Module (TCM) Connector End Views ................................... 7A2-17
Transmission Control Connector End Views.. 7A2-18
Diagnostic Information and Procedures ............ 7A2-21
Diagnostic Starting Point - Transmission Controls......... 7A2-21
Diagnostic System Check - Transmission Controls....... 7A2-22
Scan Tool Data List ........................................ 7A2-24
Scan Tool Data Definitions............................. 7A2-25
Scan Tool Output Controls ............................. 7A2-27
Scan Tool Does Not Power Up ...................... 7A2-28
Scan Tool Does Not Communicate with Keyword Device .................................... 7A2-29
Lost Communication with The Transmission Control Module (TCM)
.... 7A2-31
DTC P0560 (Flash Code 16).......................... 7A2-33
DTC P0602 .................................................... 7A2-35
DTC P0705 (Flash Code 17).......................... 7A2-36
DTC P0710 (Flash Code 15).......................... 7A2-40
DTC P0717 (Flash Code 14).......................... 7A2-44
DTC P0722 (Flash Code 11).......................... 7A2-47
DTC P0727 (Flash Code 13).......................... 7A2-50
DTC P0731, P0732, P0733 or P0734 (Flash Code 41, 42, 43 or 44)....................... 7A2-52
DTC P0748 (Flash Code 35).......................... 7A2-55
DTC P0753 (Flash Code 31).......................... 7A2-58
DTC P0758 (Flash Code 32).......................... 7A2-61
DTC P0763 (Flash Code 33).......................... 7A2-64
DTC P0768 (Flash Code 34).......................... 7A2-67
DTC P1120 (Flash Code 22).......................... 7A2-70
DTC P1750 (Flash Code 51).......................... 7A2-71
DTC P1755 (Flash Code 52).......................... 7A2-73
DTC P1853 (Flash Code 26).......................... 7A2-75
DTC P1858 (Flash Code 27).......................... 7A2-78
DTC P1860 (Flash Code 36).......................... 7A2-81
DTC P1863 (Flash Code 28).......................... 7A2-84
DTC P1875 (Flash Code 25).......................... 7A2-87
Check Trans Lamp Inoperative, Always On or Always Blinking ...................... 7A2-89
Symptoms - Transmission Controls .................. 7A2-92 Symptoms - Transmission Controls ............... 7A2-92
Intermittent Conditions ................................... 7A2-93 Vehicle Does Not Run .................................... 7A2-95
Trouble at Starting.......................................... 7A2-95
Faulty Gearshift .............................................. 7A2-95
Faulty Shift Pattern......................................... 7A2-95
No or Error Gearshift ...................................... 7A2-95
Faulty Operation During Running................... 7A2-95
Faulty Operation in Stopping.......................... 7A2-95
Faulty Lock Up ............................................... 7A2-95
No Lock Up .................................................... 7A2-95
Transmission Fluid Leak ................................ 7A2-95
Others ............................................................ 7A2-95
Test Instructions .............................................. 7A2-121 Line Pressure Test ....................................... 7A2-121
Stall Test ...................................................... 7A2-123
Time Lag Test .............................................. 7A2-124
Road Test..................................................... 7A2-125
TCM Signal Test .......................................... 7A2-134
Repair Instructions .......................................... 7A2-139
Transmission Controls Module (TCM) Replacement.... 7A2-139
Service Programming System (SPS) Description........ 7A2-139
Service Programming System (SPS) (Remote Procedure)......................... 7A2-140
Service Programming System (SPS) (Pass-Thru Procedure)..................... 7A2-141
Description and Operation .............................. 7A2-143 Transmission Identification Information........ 7A2-143
Transmission General Description ............... 7A2-143
Transmission Component Description ......... 7A2-144
Transmission Control System Description ... 7A2-152
Transmission Power Flow Description ......... 7A2-161
Special Tools and Equipment ......................... 7A2-170 Special Tools and Equipment ...................... 7A2-170

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TRANSMISSION CONTROL SYSTEM (JR405E) 7A2-33
DTC P0560 (Flash Code 16)
Circuit Description
The TCM monitors the ignition voltage on the ignition
feed terminal to make sure that the voltage stays within
the proper range. If the TCM detects an excessively
low ignition voltage, this DTC will set.
Condition for Running the DTC • The ignition switch is ON.
• The engine speed is more than 1000 RPM.
Condition for Setting the DTC • The TCM detects that the ignition voltage feed circuit is less than 10 volts for 1 second.
Action Taken When the DTC Sets • The TCM blinks the Check Trans lamp when the diagnostic runs and fails.
During the vehicle running;
• The TCM holds the last gear position when the diagnostic runs and fails.
• The TCM inhibits lock up control. After the vehicle stopped;
• The TCM stops all shift solenoid valves and fixes to the 3rd gear. If a fail-safe valve problem is
detected, the shift solenoid valves are not stopped
but gear is fixed to the 3rd gear.
• The TCM stops PC solenoid valve.
Condition for Clearing the DTC • The TCM turns OFF the Check Trans lamp when the diagnostic runs and does not fail.
• A current DTC clears when the diagnostic runs and does not fail.
Diagnostic Aids • A charging system problem may set this DTC.
• The weakened battery may set this DTC.
Schematic Reference: Transmission Controls
Schematics
Connector End View Reference: Transmission
Controls Connector End Views or TCM Connector End
Views
Circuit/ System Testing DTC P0560
Step Action Value(s)Yes No
1 Did you perform the Diagnostic System Check -
Transmission Controls? —
Go to Step 2 Go to Diagnostic
System Check -
Transmission Controls
2 1. Install a scan tool.
2. Turn OFF the ignition for 30 seconds.
3. Start the engine and let idle.
4. Load the electrical system by turning ON the headlights, A/C, etc. while observing the DTC
Information with a scan tool.
Does the DTC fail this ignition? —
Go to Step 3 Go to Diagnostic
Aids
3 Test the charging system. Refer to Diagnosis of
The Charging System in the Charging System
Section.
Did you find a charging system problem? —
Go to Step 4 Go to Step 5
4 Repair the charging system. Refer to Diagnosis of
The Charging System in the Charging System
Section.
Did you complete the repair? —
Go to Step 6 —
5 1. Turn OFF the ignition.
2. Disconnect the TCM harness connector.
3. Inspect for an intermittent, for poor connections and for corrosion at the harness
connector of the TCM (pins 5, 18 and 24 of C-
95).
4. Repair the connection(s) as necessary.
Did you find and correct the condition? —
Go to Step 6 Go to Diagnostic
Aids

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7A2-70 TRANSMISSION CONTROL SYSTEM (JR405E)
DTC P1120 (Flash Code 22)
Circuit Description
The accelerator pedal position (APP) sensor is
mounted on the accelerator pedal control assembly.
The analogue APP signals are converted by the engine
control module (ECM) into a pulse width modulation
(PWM) signal. This converted signal is continually sent
from the ECM to the TCM to determine appropriate
shift points depending on the accelerator pedal
pressing amount. If the TCM fails to receive a PWM
signal from the ECM, this DTC will set.
Condition for Running the DTC • The ignition switch is ON.
Condition for Setting the DTC • The TCM detects that the APP PWM signal from the ECM is not being received.
Action Taken When the DTC Sets • The TCM blinks the Check Trans lamp when the diagnostic runs and fails.
During the vehicle running; • The TCM holds the last gear position when the
diagnostic runs and fails.
• The TCM inhibits lock up control.
After the vehicle stopped;
• The TCM stops all shift solenoid valves and fixes to the 3rd gear. If a fail-safe valve problem is
detected, the shift solenoid valves are not stopped
but gear is fixed to the 3rd gear.
• The TCM stops PC solenoid valve.
Condition for Clearing the DTC • The TCM turns OFF the Check Trans lamp when the diagnostic runs and does not fail.
• A current DTC clears when the diagnostic runs and does not fail.
Diagnostic Aids • If an intermittent condition is suspected, refer to Intermittent Conditions in this section.
Circuit/ System Testing DTC P1120
Step Action Value(s)Yes No
1 Did you perform the Diagnostic System Check -
Transmission Controls? —
Go to Step 2 Go to Diagnostic
System Check - Transmission
Controls
2 1. Install a scan tool.
2. Turn OFF the ignition for 30 seconds.
3. Start the engine.
4. Monitor the ENGINE DTC Information with a scan tool.
Is DTC P2621 or P2622 set? —
Go to Applicable DTC in engine
control section Go to Diagnostic
Aids

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TRANSMISSION CONTROL SYSTEM (JR405E) 7A2-87
DTC P1875 (Flash Code 25)
Circuit Description
The all shift solenoid valves feed drive voltage from the
TCM and low side circuit is connected to the TCM
through the ground return circuit. The TCM monitors
the ground return circuit through the feedback circuit. If
the TCM detects an improper status on the ground
return circuit, this DTC will set.
Condition for Running the DTC • The ignition switch is ON.
Condition for Setting the DTC • The TCM detects an open circuit on the ground return circuit.
Action Taken When the DTC Sets • The TCM blinks the Check Trans lamp when the diagnostic runs and fails.
• The TCM stops all shift solenoid valves and fixes to the 3rd gear. If a fail-safe valve problem is
detected, the shift solenoid valves are not stopped
but gear is fixed to the 3rd gear. • The TCM stops PC solenoid valve.
• The TCM inhibits lock up control.
Condition for Clearing the DTC • The TCM turns OFF the Check Trans lamp when the diagnostic runs and does not fail at next
ignition cycle.
• A current DTC clears when the diagnostic runs and does not fail at next ignition cycle.
Diagnostic Aids • If an intermittent condition is suspected, refer to Intermittent Conditions in this section.
Schematic Reference: Transmission Controls
Schematics
Connector End View Reference: Transmission
Controls Connector End Views or TCM Connector End
Views
Circuit/ System Testing DTC P1875
Step Action Value(s)Yes No
1 Did you perform the Diagnostic System Check -
Transmission Controls? —
Go to Step 2 Go to Diagnostic
System Check -
Transmission Controls
2 1. Install a scan tool.
2. Turn OFF the ignition for 30 seconds.
3. Start the engine.
4. Monitor the DTC Information with a scan tool.
Does the DTC fail this ignition? —
Go to Step 3 Go to Diagnostic
Aids
3 1. Turn OFF the ignition.
2. Disconnect the in-line harness connector (E- 54) near the transmission range switch.
3. Connect a test lamp between the ground return circuit (pin 11 of E-54 male side) and
battery voltage.
Does the test lamp illuminate? —
Go to Step 4 Go to Step 7
4 1. Inspect for an intermittent and for a poor
connection at the in-line harness connector
(pin 11 of E-54).
2. Repair the connection(s) as necessary.
Did you find and correct the condition? —
Go to Step 9 Go to Step 5
5 1. Test the circuit between the TCM (pin 22 of C-
95) and the in-line harness connector (pin 11
of E-54 female side) for an open circuit or high
resistance.
2. Repair the circuit(s) as necessary.
Did you find and correct the condition? —
Go to Step 9 Go to Step 6

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7A2-92 TRANSMISSION CONTROL SYSTEM (JR405E)
Symptoms - Transmission Controls
Symptoms - Transmission Controls
Important Preliminary Inspections Before Starting
Perform Diagnostic System Check - Transmission
Controls before using the symptom tables, and verify
that all of the following are true:
• The TCM and check trans lamp is operating correctly.
• The scan tool data is within the normal operating range. Refer to Scan Tool Data List in this section.
• Verify the customer concern and locate the correct symptom in the table of contents. Inspect the items
indicated under that symptom.
Visual and Physical Inspection
Several of the symptom procedures ask for careful
visual and physical inspection. This step is extremely
important. The visual and physical inspection can lead
to correcting a problem without further inspections, and
can save valuable time. Ensure that:
• The TCM grounds are clean, tight, and in their proper location.
• The transmission harness wiring and terminals are properly connected and are not pinched or cut.
Intermittent
Important: Inspect for improper installation of electrical
components if an intermittent condition exists. Inspect
for aftermarket add-on electrical equipment devices,
lights, and cellular phones. Verify that no aftermarket
equipment is connected to the serial data circuit.
Important: The problem may or may not turn ON the
check trans lamp or store a DTC. Faulty electrical
connections or wiring cause most intermittent
problems.
Perform a careful visual and physical inspection of the
suspect connectors for the following conditions:
• Improperly mated connector halves
• Terminals that are not seated
• Terminals that are damaged or improperly formed
Reform or replace connector terminals in the problem
circuit in order to ensure proper contact tension.
Remove the terminal from the connector body in order
to inspect for poor terminal wire connection.
Road test the vehicle with the DMM connected to the
suspected circuit. An abnormal reading that occurs
when the malfunction occurs is a good indication that
there is a malfunction in the circuit being monitored.
Use the scan tool in order to help detect intermittent
conditions. Useful features of the Tech 2 includes the
following: • Trigger the Snapshot feature in order to capture
and store transmission parameters when the
malfunction occurs. Review this stored information
in order to see the specific running conditions that
caused the malfunction.
• Use the Plot Function on the scan tool in order to plot selected data parameters. Review this stored
information to aid in locating an intermittent
problem. Refer to the scan tool Users Guide for
more information.
Important: If the intermittent condition exists as a start
and then stall, test for DTCs relating to the vehicle theft
deterrent system. Test for improper installation of
electrical options such as lights, cellular phones, etc.
Any of the following may cause an intermittent check
trans lamp with no stored DTC:
• The TCM grounds are loose or dirty. Refer to Transmission Controls Schematics.
• The check trans lamp circuit intermittently shorted to ground
• Electrical system interference caused by a malfunctioning relay, TCM driven solenoid, or
switch. The electrical component can cause a
sharp electrical surge. Normally, the problem will
occur when the malfunctioning component is
operating.
• There are any open diodes.
Important: The following symptom tables contain
groups of possible causes for each symptom. The
order of these procedures is not important. If the scan
tool readings do not indicate the problems, then
proceed in a logical order, easiest to check or most
likely to cause first. In order to determine if a specific
vehicle is using a particular system or component, refer
to Transmission Controls Schematics for an
application.
Use the following tables when diagnosing a symptom
complaint:
• Intermittent Conditions
• Vehicle Does Not Run
• Trouble at Starting
• Faulty Gearshift
• Faulty Shift Pattern
• No or Error Gearshift
• Faulty Operation During Running
• Faulty Operation in Stopping
• Faulty Lock Up
• No Lock Up
• Transmission Fluid Leak
•Others

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