start ISUZU KB P190 2007 Workshop Repair Manual

Automatic Transmission – 4L60E – General Information Page 7C1–12
General Definition
Check Ball A spherical, hydraulically controlled component (usually of steel) that either seals or
opens fluid circuits. It is also referred to as a check valve.
Clutch Pack An assembly of components generally consisting of clutch plates, an apply plate and a
backing plate.
Clutch Plate A hydraulically activated component that has two basic designs: (1) all steel, or (2) a
steel core with friction material bonded to one or two sides of the plate.
Control Valve Body A machined metal casting that contains valve trains and other hydraulically controlled components that shift the transmission.
Coupling Speed The speed at which a vehicle is travelling and no longer requires torque multiplication through the torque converter. At this point, the stator 'free wheels' to allow fluid leaving
the turbine to flow directly to the pump. (Also see Torque Converter).
De-energise(d) To interrupt the electrical current that flows to an electronically controlled device,
making it electrically inoperable.
Direct Drive A condition in a gears set where the input speed and input torque equals the output
speed and output torque. The gear ratio through the gear set is 1:1.
Downshift A change in a gear ratio where both input speed and torque increases.
Duty Cycle In reference to an electronically controlled solenoid, it is the amount of time (expressed
as a percentage) that current flows through the solenoid coil.
Energise(d) To supply a current to an electronically controlled device, enabling it to perform its
designed function.
Engine Compression Braking A condition where compression from the engine is used with the transmission to decrease vehicle speed.
Exhaust The release of fluid pressure from a hydraulic circuit. (The words 'exhausts' and
'exhausting' are also used and have the same intended meaning.)
Fail-safe Mode A condition whereby a component (i.e. engine or transmission) will partially function even if its electrical circuit is disabled.
Fluid In this Section of the Service Manual, 'fluid' refers primarily to automatic transmission
fluid (or ATF) and, for the Hydra-matic 4L60E transmission, the only recommended
fluid is Dexron
III.
Fluid Pressure A pressure that is consistent throughout a given fluid circuit.
Force A measurable effort that is exerted on an object (component).
Freewheeling A condition where power is lost through a driving or holding device (i.e. roller or sprag
clutches).
Friction Material A heat and wear resistant fibrous material, bonded to clutch plates and bands.
Gear A round, toothed device that is used for transmitting torque through other components.
Gear Range A specific speed to torque ratio at which the transmission is operating (i.e. 1st gear,
2nd gear etc.).
Gear Ratio Revolutions of an input gear as compared to the revolutions of an output gear. It can
also be expressed as the number of teeth on a gear as compared to the number of
teeth on a gear that it is in mesh with.
Hydraulic Circuit A fluid passage which often includes the mechanical components in that circuit
designed to perform a specific function.
Input A starting point for torque, revolutions or energy into another component of the
transmission.
Internal Gear The outermost member of a gear set that has gear teeth in constant mesh with the
planetary pinion gears of the gear set.
Land (Valve Land) The larger diameters of a spool valve that contact the valve bore or bushing.

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Automatic Transmission – 4L60E – General Information Page 7C1–16
6 Torque Specifications
Oil pan attaching bolt ............................................................................ 12.0 Nm
Shift selector base plate attaching nut ................................................... 7.0 Nm
Spring plate attaching screw .................................................................. 2.0 Nm
Selector lever knob attaching screw ....................................................... 2.0 Nm
Selector cable bracket attaching bolt.................................................... 22.0 Nm
Heat shield front attaching screw .............................................. 15.0 – 35.0 Nm
Heat shield rear attaching screw ............................................................ 9.0 Nm
Manual shaft linkage attaching nut ...................................................... 25.0 Nm
Neutral start and back-up lamp switch attaching screw............. 15.0 – 35.0 Nm
Vehicle speed sensor attaching bolt ........................................... 11.0 - 14.0 Nm
Transmission mount attaching bolt ...................................................... 50.0 Nm
Transmission support attaching bolt and nut ............................. 50.0 – 65.0 Nm
Transmission mount attaching nut ....................................................... 52.0 Nm
Heat shield to transmission support attaching bolt ............................... 52.0 Nm
Extension housing attaching bolt ............................................... 42.0 – 48.0 Nm
1 – 2 Accumulator cover attaching bolt................................................. 12.0 Nm
TCC solenoid attaching bolt ................................................................. 12.0 Nm
Control valve body attaching bolt ......................................................... 12.0 Nm
Transmission fluid pressure (TFP) manual valve
position switch attaching bolt ................................................................ 12.0 Nm
Manual detent spring attaching bolt ...................................................... 23.0 Nm
Spacer plate support plate attaching bolt ............................................. 12.0 Nm
Filler tube bracket attaching bolt................................................ 20.0 – 35.0 Nm
Vent pipe attaching bolt .......................................................................... 6.0 Nm
Transmission cooler lines bracket attaching screw .............................. 23.0 Nm
Torque converter housing attaching bolt ................................... 52.0 – 66.0 Nm
Torque converter to flexplate attaching bolt............................... 60.0 – 70.0 Nm
Torque converter cover attaching bolt ....................................... 12.0 – 16.0 Nm
TCM bracket attaching nut ..................................................................... 7.0 Nm
TCM attaching bolt and nut .................................................................... 7.0 Nm
Oil Pump Cover to Pump Body Attaching Bolt...................................... 25.0 Nm
Pressure Control Solenoid Retainer Attaching Bolt .............................. 12.0 Nm
Forward Accumulator Cover Attaching Bolt .......................................... 12.0 Nm
Oil Pump to Transmission Case Attaching Bolt .................................... 30.0 Nm
Torque Converter Housing to
Transmission Case Attaching Bolt............................................. 65.0 – 75.0 Nm

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Automatic Transmission – 4L60E – Electrical Diagnosis Page 7C2–10
Limp Home Mode Description
If a major electrical system failure occurs which could affect vehicle safety or damage the transmission during normal
operation, the TCM enters a limp home mode. In the limp home mode, the transmission operates in the following
manner:
• The pressure control solenoid is off and the line pressure is at maximum to minimise clutch slippage.
• The TCC solenoid is off, therefore the torque converter clutch is disabled.
• The two shift solenoids are turned off. The transmission will operate in fourth gear if the vehicle has successfully
completed a 1-2 upshift in the current ignition cycle. If the vehicle has not completed a 1-2 upshift in the current
ignition cycle, the transmission will operate in third gear. If the transmission is operating in fourth gear, third gear
may be obtained if the engine is stopped briefly and re-started.
In limp home mode, the gear selector lever is ineffective at selecting forward gear ranges. In third or fourth gear, heat
builds up in the transmission quickly, particularly in stop and go traffic. Excessive heat build-up may cause transmission
failure if the vehicle is driven for extended distances in limp home mode.
1.3 Transmission Indicators and Messages
For information pertaining to the instrument cluster and the transmission information it displays, refer to the RA Rodeo
Owner Handbook.
1.4 Electronic Component Description
For all other electrical components not covered in this section, refer to General Motors Powertrain Group Electronically
Controlled Automatic Transmission Technician's Guide.
Transmission Control Module (TCM)
The Transmission Control Module (TCM) is located under the instrument panel, next to the brake pedal assembly and
connects directly to the transmission wiring harness. A single 49-way connector is used to make the connection between
the vehicle wiring harness and the TCM.
To access the connector for diagnosis:
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 7C2 – 2: a remove the securing pin (3),
b press the locking tab and swing the lever (4) to free the connector,
c remove the connector.

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Automatic Transmission – 4L60E – Electrical Diagnosis Page 7C2–27
4 Diagnostics
4.1 Introduction
The transmission diagnostic procedure is organised in a logical structure that begins with the diagnostic system check
and as such must always be used as the starting point. The diagnostic system check directs the technician to the logical
steps necessary to diagnose a transmission driveability fault condition.
4.2 Basic Knowledge Required

A lack of basic understanding regarding
electronics, electrical wiring circuits and use
of electrical circuit testing tools when
performing any diagnostic procedure, could
result in incorrect diagnostic results or
damage to system components.
Understanding of the following is required to perform any of the diagnostic procedures detailed in this Service
Information:
• Basic electronics,
• Electrical wiring circuits,
• Electrical circuits testing, and
• Correct use of basic system diagnostic tools.
4.3 Diagnostic Precautions

When tests are required on connector
terminals, use the adapters in connector
adaptor kit J35616-C to prevent damage to
terminals.
The following precautions must be observed when performing all diagnostic procedures. Otherwise, incorrect diagnostic
results or damage to system components will occur:
1 Disconnection of the battery affects certain vehicle electronic systems.
2 Disconnect the battery negative lead when performing the following procedures:
• Disconnecting the electronic control module wiring harness connector/s or
• Charging the battery.
3 Disconnect the battery terminal ground lead and the electronic control module wiring harness connector before attempting any electric arc welding on the vehicle.
4 Do not start the engine if the battery terminal is not properly secured to the battery.
5 Do not disconnect or reconnect any of the following while the ignition is switched on or when the engine is running:
• Any electronic control module or system component electrical wiring connector, or
• Battery terminal leads.
6 Ensure that the correct procedure for disconnecting and connecting system electrical wiring harness connectors is always followed. For information on the correct procedure for disconnecting and connecting specific wiring
connectors, refer to 8A Electrical-Body and Chassis.

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Automatic Transmission – 4L60E – Electrical Diagnosis Page 7C2–31
Test Description
The following numbers refer to the step numbers in the diagnostic table:
1 Within this document there are a number of requirements that must be met before you can start diagnosis. Refer to 4.2 Basic Knowledge Required, 4.3 Diagnostic Precautions and 4.4 Preliminary Checks.
2 Checks if there is data communication between Tech 2 and the TCM.
3 Checks if the TCM has set any DTCs. If no DTCs have set, the functional test must be performed, which diagnoses the hydro-mechanical functions of the transmission.
Step Action Yes No
1 Have you read the Basic Diagnostic Requirements, Diagnostic
Precautions and Preliminary Checks? Go to Step 3 Refer to Note 1
2
1 Connect Tech 2 to the DLC.
2 On Tech 2 select: Transmission / Automatic Transmission
and follow the instruction on Tech 2.
Does Tech 2 display the TCM specifications? Go to Step 4 Refer to 6E1
Powertrain Interface
Module
3 On Tech 2 select:
Diagnostic Trouble Codes / Read DTC Information
Does Tech 2 display any DTCs?
Go to
4.8 Diagnostic Trouble Code List Perform the
Functional Test, refer to 7C3 Automatic
Transmission –
4L60E – Hydraulic and Mechanical Diagnosis
4.8 Diagnostic Trouble Code List
NOTE
If the DTC listed on Tech 2 is not contained in
this list, refer to OD Vehicle Diagnostics.
DTC Type Description Diagnostic Table
P0218 C Transmission Fluid Overtemperature 4.9 DTC P0218 – Transmission
Fluid Overtemperature
P0562 C System Voltage Low 4.10 DTC P0562 – System
Voltage Low
P0563 C System Voltage High 4.11 DTC P0563 – System
Voltage High
P0601 A Transmission Control Module (TCM) Read Only Memory
(ROM) 4.12 DTC P0601 to P0604 or
P1621 – TCM Malfunction
P0602 A Transmission Control Module (TCM) Not Programmed 4.12 DTC P0601 to P0604 or
P1621 – TCM Malfunction
P0603 A Transmission Control Module (TCM) Random Access
Memory (RAM) 4.12 DTC P0601 to P0604 or
P1621 – TCM Malfunction
P0604 A Transmission Control Module (TCM) Long Term Memory
Performance 4.12 DTC P0601 to P0604 or
P1621 – TCM Malfunction
P0711 C Transmission Fluid Temperature (TFT) Sensor
Performance 4.13 DTC P0711 to P0713 –
Transmission Fluid Temperature
Sensor
P0712 C Transmission Fluid Temperature (TFT) Sensor Circuit Low
Voltage 4.13 DTC P0711 to P0713 –
Transmission Fluid Temperature
Sensor

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Automatic Transmission – 4L60E – Electrical Diagnosis Page 7C2–32
DTC Type Description Diagnostic Table
P0713 C Transmission Fluid Temperature (TFT) Sensor Circuit High
Voltage 4.13 DTC P0711 to P0713 –
Transmission Fluid Temperature
Sensor
P0719 C Brake Switch Circuit High Input (Stuck On) 4.14 DTC P0719 – Brake Switch
Circuit High Input (Stuck On)
P0722 B Vehicle Speed Sensor Circuit Low Voltage 4.15 DTC P0722 – Vehicle Speed
Sensor Circuit Low Voltage
P0723 B Vehicle Speed Sensor Circuit Intermittent 4.16 DTC P0723 – Vehicle Speed
Sensor Circuit Intermittent
P0724 C Brake Switch Circuit Low Input (Stuck Off) 4.17 DTC P0724 – Brake Switch
Circuit Low Input (Stuck Off)
P0741 B Torque Converter Clutch (TCC) System – Stuck Off 4.18 DTC P0741 – Torque
Converter Clutch System – Stuck Off
P0742 B Torque Converter Clutch (TCC) System – Stuck On 4.17 DTC P0724 – Brake Switch
Circuit Low Input (Stuck Off)
P0751 B 1-2 Shift Solenoid (SS) Valve Performance – No First or
Fourth Gear 4.20 DTC P0751 – 1-2 Shift
Solenoid Valve Performance – No
First or Fourth Gear
P0752 B 1-2 Shift Solenoid (SS) Valve Performance – No Second or
Third Gear 4.21 DTC P0752 – 1-2 Shift
Solenoid Valve Performance – No
Second or Third Gear
P0756 A 2-3 Shift Solenoid (SS) Valve Performance – No First or
Second Gear 4.22 DTC P0756 – 2-3 Shift
Solenoid Valve Performance – No
First or Second Gear
P0757 A 2-3 Shift Solenoid (SS) Valve Performance - No Third or
Fourth Gear 4.23 DTC P0757 – 2-3 Shift
Solenoid Valve Performance – No
Third or Fourth Gear
P0787 A 3-2 Shift Solenoid (SS) Control Circuit Low Voltage 4.24 DTC P0787 – 3-2 Shift
Solenoid Control Circuit Low Voltage
P0788 A 3-2 Shift Solenoid (SS) Control Circuit High Voltage 4.25 DTC P0788 – 3-2 Shift
Solenoid Control Circuit High Voltage
P0894 B Transmission Component Slipping 4.26 DTC P0894 – Transmission
Component Slipping
P0961 C Line Pressure Control (PC) Solenoid System Performance 4.27 DTC P0961 – Line Pressure
Control Solenoid System Performance
P0973 B 1-2 Shift Solenoid (SS) Control Circuit Low Voltage 4.28 DTC P0973 – 1-2 Shift
Solenoid Control Circuit Low Voltage
P0974 B 1-2 Shift Solenoid (SS) Control Circuit High Voltage 4.29 DTC P0974 – 1-2 Shift
Solenoid Control Circuit High Voltage
P0976 A 2-3 Shift Solenoid (SS) Control Circuit Low Voltage 4.30 DTC P0976 – 2-3 Shift
Solenoid Control Circuit Low Voltage
P0977 A 2-3 Shift Solenoid (SS) Control Circuit High Voltage 4.31 DTC P0977 – 2-3 Shift
Solenoid Control Circuit High Voltage
P1621 A Transmission Control Module (TCM) Long Term Memory
Performance 4.12 DTC P0601 to P0604 or
P1621 – TCM Malfunction
P1810 B Transmission Fluid Pressure (TFP) Position Switch Circuit 4.32 DTC P1810, P1815 and
P1816 – Transmission Fluid Pressure
Position Switch
P1815 B Transmission Fluid Pressure (TFP) Valve Position Switch -
Start in W rong Range 4.32 DTC P1810, P1815 and
P1816 – Transmission Fluid Pressure
Position Switch

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Automatic Transmission – 4L60E – Electrical Diagnosis Page 7C2–33
DTC Type Description Diagnostic Table
P1816 B Transmission Fluid Pressure (TFP) Valve Position Switch
Indicates Park/Neutral (P/N) with Drive Ratio 4.32 DTC P1810, P1815 and
P1816 – Transmission Fluid Pressure
Position Switch
P2763 B Torque Converter Clutch (TCC) Pressure Control (PC)
Solenoid Control Circuit High Voltage 4.33 DTC P2763 – Torque
Converter Clutch Pressure Control
Solenoid Control Circuit High Voltage
P2764 B Torque Converter Clutch (TCC) Pressure Control (PC)
Solenoid Control Circuit Low Voltage 4.34 DTC P2764 – Torque
Converter Clutch Pressure Control
Solenoid Control Circuit Low Voltage
P2769 B Torque Converter Clutch (TCC) Enable Solenoid Control
Circuit Low Voltage 4.35 DTC P2769 – Torque
Converter Clutch Enable Solenoid
Control Circuit Low Voltage
P2770 B Torque Converter Clutch (TCC) Enable Solenoid Control
Circuit High Voltage 4.36 DTC P2770 – Torque
Converter Clutch Enable Solenoid
Control Circuit High Voltage
U0073 B ECM CAN Bus Error
4.37 DTC U0073 and U0100 –
CAN-Bus No Communication With
ECM (Engine Control Module)
U0100 B ECM CAN Bus Error
4.37 DTC U0073 and U0100 –
CAN-Bus No Communication With
ECM (Engine Control Module)
4.9 DTC P0218 – Transmission Fluid Overtemperature
DTC Description
This diagnostic procedure supports DTC P0218 Transmission Fluid Overtemperature.
Circuit Description
The flow of transmission fluid starts in the bottom pan and is drawn through the filter, control valve body assembly,
transmission case and into the oil pump assembly. The oil pump assembly pressurises the fluid and directs it to the
pressure regulator valve where it becomes the main supply of fluid to the various components and hydraulic circuits in
the transmission. Hot fluid exiting the torque converter flows through the converter clutch apply valve and into the
transmission cooler lines, to the oil cooler located in the vehicle radiator, and auxiliary cooler if equipped. From the cooler ,
fluid returns to cool and lubricate the front of the transmission. In forward drive ranges, D4 fluid from the manual valve is
routed through an orificed cup plug in the rear of the transmission case to feed the rear lube fluid circuit.
When the transmission control module (TCM) detects a high transmission fluid temperature (TFT) for a long period of
time, DTC P0218 sets. DTC P0218 is a type C DTC.
Refer to 2 W iring Diagrams and Connector Chart to aid in diagnosis.
Conditions for Running the DTC
• No DTCs P0711, P0712 or P0713.
• The ignition switch is on for 5 seconds.
Conditions for Setting the DTC
The TFT is greater than 130°C for 600 seconds (10 minutes).
Action Taken When the DTC Sets
•
The TCM does not request the ECM to illuminate the MIL.
• The TCM freezes transmission adapt functions.

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Automatic Transmission – 4L60E – Electrical Diagnosis Page 7C2–35
Step Action Yes No
3 1 Inspect the engine cooling system and transmission cooling
system for the following conditions:
• Air flow restrictions
• Air flow blockage
• Debris
2 Inspect the transmission cooling system for damaged cooler lines.
3 Check the flow rate of the transmission fluid, refer to 7C4 Automatic Transmission – 4L60E – On-vehicle Servicing.
Did you find and correct the condition? Go to Step 6 Go to Step 4
4 Test for correct line pressure, refer to 7C3 Automatic Transmission –
4L60E – Hydraulic and Mechanical Diagnosis.
Did you find and correct the condition? Go to Step 6 Go to Step 5
5 Diagnose the torque converter stator, refer to 7C3 Automatic
Transmission – 4L60E – Hydraulic and Mechanical Diagnosis.
Did you find and correct the condition? Go to Step 6 Check for an
intermittent fault in the circuit, refer to
8A Electrical-Body
and Chassis
6 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 Start and idle the engine until it reaches normal operating temperature.
4 On Tech 2 select: Data Display / Transmission Data.
5 Drive the vehicle for 10 minutes.
6 On Tech 2, monitor the Transmission Fluid Temp. and ensure
it has stabilised and is less than 129°C.
7 On Tech 2 select:
Diagnostic Trouble Codes / Read DTC Information.
Has DTC P0218 set? Go to Step 2 Go to Step 7
7 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.
4.10 DTC P0562 – System Voltage Low
DTC Description
This diagnostic procedure supports DTC P0562 System Voltage Low.
Circuit Description
The transmission control module (TCM) continuously monitors the system voltage on the battery and ignition circuits.
Lower than normal voltage may be inadequate to operate the transmission control solenoids properly. Improper solenoid
operation may cause erratic transmission operation and tie-up conditions, which may result in internal damage.

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Automatic Transmission – 4L60E – Electrical Diagnosis Page 7C2–37
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 Using a multimeter set to measure voltage, probe across the battery terminals.
Does the multimeter display greater than 11 V? Go to Step 3 Check the
serviceability of the battery, refer to
8A Electrical-Body and Chassis
3 1 Start the engine.
2 Allow the engine to warm up to normal operating temperature.
Is the alternator fail warning indicator illuminated? Refer to
6D1-1 Charging system – V6 Go to Step 4
4 1 Turn on the high beam headlamps.
2 Turn the HVAC fan control to the highest speed setting.
3 Turn on the rear window demister.
4 Increase the engine speed to 1,500 r.p.m.
5 Using a multimeter set to measure voltage, probe across the battery terminals.
Does the multimeter display 12.5 – 14.5 V? Go to Step 5 Refer to
6D1-1 Charging system – V6
5 1 Increase the engine speed to 1,500 r.p.m.
2 On Tech 2 select: Data Display / Transmission Data
Does Tech 2 display the Ignition Voltage parameter within 12.5 –
14.5 V? Check for an
intermittent fault in the circuit, refer to
8A Electrical-Body
and Chassis Go to Step 6
6
Check the fuses EB-4 and C-8 for serviceability.
Are the fuses serviceable?
Go to Step 7 Replace the
affected fuse(s). If the fuse(s) blow
again, check for a short to ground in the fuses circuit
Go to Step 13
7 1 Turn off the ignition.
2 Disconnect the TCM connector C-96.
3 Using a multimeter set to measure voltage, probe between connector C-96 pin 32 and a known ground.
Does the multimeter display battery voltage? Go to Step 8 Check measured
circuits for an open,
high resistance or short to ground
Repair or replace
the affected circuit

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Automatic Transmission – 4L60E – Electrical Diagnosis Page 7C2–38
Step Action Yes No
8 1 Using a multimeter set to measure voltage, probe between
connector C-96 pin 31 and a known ground.
2 Turn on the ignition, with the engine off.
Does the multimeter display battery voltage? Go to Step 9 Check measured
circuits for an open, high resistance or short to ground
Repair or replace
the affected circuit
9 Using a multimeter set to measure resistance, probe between
connector C-96 pin 49 and a known ground.
Does the multimeter display continuity?
Got to Step 10 Check measured
circuit for an open or
high resistance
Repair or replace affected circuit
10 Replace the TCM, refer to 7C4 Automatic Transmission – 4L60E –
On-vehicle Servicing
Is the action complete? Go to Step 11 —
11 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 Operate the vehicle under the following conditions: a Start the engine.
b Allow the engine to warm up to normal operating temperature.
c Raise the engine speed to at least 1,200 r.p.m.
d TCM voltage must be greater than 11 V for 12 seconds.
4 On Tech 2 select: Diagnostic Trouble Codes / Read DTC Information.
Has DTC P0562 set? Go to Step 2 Go to Step 12
12 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.
4.11 DTC P0563 – System Voltage High
DTC Description
This diagnostic procedure supports DTC P0563 System Voltage High.
Circuit Description
The transmission control module (TCM) continuously monitors the system voltage on the battery and ignition circuits.
Higher than normal voltage may cause the solenoids inside the transmission to operate improperly or damage solid-state
components inside the TCM.
W hen the TCM detects high voltage, DTC P0563 sets. DTC P0563 is a type C DTC.
Refer to 2 W iring Diagrams and Connector Chart to aid in diagnosis.
Conditions for Running the DTC
The ignition is on.

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