Isuzu KB P190. Manual — part 955

Automatic Transmission – 4L60E – Electrical Diagnosis

Page 7C2–34

•

The TCM records the operating conditions when the conditions for setting the DTC are met. The TCM stores this
information as Failure Records.

•

The TCM stores DTC P0218 in TCM history.

Conditions for Clearing the DTC

•

Tech 2 can clear the DTC.

•

The TCM clears the DTC from TCM history if the vehicle completes 40 warm-up cycles without a non-emission
related diagnostic fault occurring.

•

The TCM cancels the DTC default actions when the fault no longer exists and the DTC passes.

Diagnostic Aids

•

Tech 2’s Transmission Fluid Temp. should rise steadily to a normal operating temperature, then stabilise.

•

Ask about the customer's driving habits, trailer towing, etc. Trailer towing should occur in D3.

•

Refer to Symptoms - Automatic Transmission in 7C3 Automatic Transmission – 4L60E – Hydraulic and Mechanical
Diagnosis.

Test Description

The following numbers refer to the step numbers in the diagnostic table:

2

Low transmission fluid can cause the transmission to overheat.

3

This step inspects for airflow restrictions or damage, which may result in the transmission overheating.

4-5 Decreased line pressure will cause the transmission to overheat. The torque converter stator is the pump for the

transmission fluid. If the torque converter is damaged, it may not be producing the required pressure.

DTC P0218 Diagnostic Table

Step Action

Yes

No

1

Has the Diagnostic System Check been performed?

Go to Step 2

Refer to

4.7 Diagnostic

System Check

2

1

Connect Tech 2 to the DLC.

2

Turn on the ignition, with the engine off.

N O T E

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

Inspect for correct transmission fluid level, refer to
7C4 Automatic Transmission – 4L60E – On-vehicle Servicing.

Did you perform the fluid checking procedure?

Go to Step 3

Perform the

transmission fluid

checking procedure,

refer to

7C4 Automatic

Transmission –

4L60E – On-vehicle

Servicing

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.

Automatic Transmission – 4L60E – Electrical Diagnosis

Page 7C2–36

When the TCM detects low voltage, DTC P0562 sets. DTC P0562 is a type C DTC.

Refer to 2

Wiring Diagrams and Connector Chart to aid in diagnosis.

Conditions for Running the DTC

The engine speed is greater than 1,200 r.p.m.

Conditions for Setting the DTC

The TCM detects system voltage less than 11 V for 10 seconds.

Action Taken When the DTC Sets

•

The TCM does not request the engine control module (ECM) to illuminate the MIL.

•

The TCM records the operating conditions when the conditions for setting the DTC are met. The TCM records this
information as a Failure Record.

•

The TCM stores DTC P0562 in TCM history.

Conditions for Clearing the DTC

•

The TCM clears the DTC from TCM history if the vehicle completes 40 warm-up cycles without a non-emission
related diagnostic fault occurring.

•

Tech 2 can clear the DTC.

Diagnostic Aids

•

Observe the instrument cluster’s multi-function display messaging that would indicate the electrical system requires
service.

•

Inspect for the following conditions:

•

Loose or damaged terminals at the generator, and

•

Loose or worn generator drive belt.

Test Description

The following numbers refer to the step numbers in the diagnostic table:

3

The alternator warning indicator will illuminate if there is a problem with the charging system of the vehicle.

4

Checks the charging system voltage with a nominal load.

5

Checks if the ignition voltage measurement reported by the TCM is within acceptable parameters.

7

Checks if there is battery voltage supplied to the TCM.

8

Checks if there is battery voltage supplied through the ignition circuit to the TCM.

9

Checks the ground circuits of the TCM.

DTC P0562 Diagnostic Table

Step Action

Yes

No

1

Has the Diagnostic System Check been performed?

Go to Step 2

Refer to

4.7 Diagnostic

System Check

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.

N O T E

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