Isuzu KB P190. Manual - part 472

 

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Isuzu KB P190. Manual - part 472

 

 

ENGINE CONTROL SYSTEM (4JK1/4JJ1)   6E-271

DTC P2132 or P2133 (Flash Code 123)

Circuit Description

The accelerator pedal position (APP) sensor is
mounted on the accelerator pedal control assembly.
The sensor is made up of three individual sensors
within one housing. The ECM uses the APP sensors to
determine the amount of acceleration or deceleration
that is desired. The APP sensor 3 has the following
circuits.

• 5 volts reference circuit

• Low reference circuit

• APP sensor 3 signal circuit

The APP sensor 3 provides a signal to the ECM on the
signal circuit, which is relative to the position changes
of the accelerator pedal angle. If the ECM detects an
excessively low or high signal voltage, DTC P2132 or
P2133 will set.

Condition for Running the DTC

• DTCs P0698 and P0699 are not set.

• The battery voltage is more than 9 volts.

• The ignition switch is ON.

Condition for Setting the DTC

• The ECM detects that the APP sensor 3 signal

voltage is less than 1.2 volts. (DTC P2132)

• The ECM detects that the APP sensor 3 signal

voltage is more than 4.85 volts. (DTC P2133)

Action Taken When the DTC Sets

DTC P2132

• The ECM illuminates the SVS lamp when the

diagnostic runs and fails. Refer to DTC Type
Definitions for Action Taken When the DTC Sets -
Type C. (Euro 4 Specification)

• The ECM illuminates the MIL when the diagnostic

runs and fails. Refer to DTC Type Definitions for
Action Taken When the DTC Sets - Type A.
(Except Euro 4 Specification)

• The ECM limits fuel injection quantity.

• The ECM inhibits cruise control.

DTC P2133

• The ECM illuminates the MIL when the diagnostic

runs and fails. Refer to DTC Type Definitions for
Action Taken When the DTC Sets - Type A.

• The ECM limits fuel injection quantity.

• The ECM inhibits cruise control.

Condition for Clearing the DTC

DTC P2132

• Refer to DTC Type Definitions for Condition for

Clearing the SVS Lamp/ DTC - Type C. (Euro 4
Specification)

• Refer to DTC Type Definitions for Condition for

Clearing the MIL/ DTC - Type A. (Except Euro 4
Specification)

DTC P2133

• Refer to DTC Type Definitions for Condition for

Clearing the MIL/ DTC - Type A.

Diagnostic Aids

• If an intermittent condition is suspected, refer to

Intermittent Conditions in this section.

• APP sensor 3 may have an intermittent open

somewhere in the pedal range.

Schematic Reference: Engine Controls Schematics

Connector End View Reference: Engine Controls
Connector End Views or ECM Connector End Views

Circuit/ System Testing DTC P2132

Step

Action

Value(s)

Yes

No

1

Did you perform the Diagnostic System Check -
Engine Controls?

—

Go to Step 2

Go to Diagnostic 

System Check - 
Engine 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.

Is DTC P0698 also set?

—

Go to DTC P0698

Go to Step 3

3

Fully depress and release the accelerator pedal
while observing the Accelerator Pedal Position
(APP) Sensor 3 parameter with a scan tool.

Does the scan tool indicate less than the specified
value during depressing or releasing the pedal?

1.2 volts

Go to Step 4

Go to Diagnostic 

Aids

6E-272   ENGINE CONTROL SYSTEM (4JK1/4JJ1)

4

1.

Turn OFF the ignition.

2.

Disconnect the APP sensor harness
connector.

3.

Turn ON the ignition, with the engine OFF.

Is the APP Sensor 3 parameter more than the
specified value?

4.7 volts

Go to Step 5

Go to Step 6

5

Connect a DMM between the 5 volts reference
circuit (pin 1 of C-40) and a known good ground.

Is the DMM voltage more than the specified value?

4.7 volts

Go to Step 8

Go to Step 7

6

1.

Test the signal circuit between the ECM (pin 8
of C-58) and the APP sensor (pin 6 of C-40)
for the following conditions:

• A short to ground

• A short to the low reference circuit

2.

Repair the circuit(s) as necessary.

Did you find and correct the condition?

—

Go to Step 12

Go to Step 11

7

1.

Test the 5 volts reference circuit between the
ECM (pin 7 of C-58) and the APP sensor (pin
1 of C-40) for an open circuit or high
resistance.

2.

Repair the circuit(s) as necessary.

Did you find and correct the condition?

—

Go to Step 12

Go to Step 9

8

1.

Inspect for an intermittent and for a poor
connection at the harness connector of the
APP sensor (pin 1 of C-40).

2.

Repair the connection(s) as necessary.

Did you find and correct the condition?

—

Go to Step 12

Go to Step 10

9

1.

Turn OFF the ignition.

2.

Disconnect the ECM harness connector.

3.

Inspect for an intermittent and for a poor
connection at the harness connector of the
ECM (pin 7 of C-58).

4.

Repair the connection(s) as necessary.

Did you find and correct the condition?

—

Go to Step 12

Go to Step 11

10

Replace the APP sensor. Refer to APP Sensor
Replacement.

Did you complete the replacement?

—

Go to Step 12

—

11

Important: Replacement ECM must be
programmed and learned.
Replace the ECM. Refer to ECM Replacement.

Did you complete the replacement?

—

Go to Step 12

—

Step

Action

Value(s)

Yes

No

ENGINE CONTROL SYSTEM (4JK1/4JJ1)   6E-273

Circuit/ System Testing DTC P2133

12

1.

Reconnect all previously disconnected
harness connector(s).

2.

Clear the DTCs with a scan tool.

3.

Turn OFF the ignition for 30 seconds.

4.

Start the engine.

5.

Fully depress and release the accelerator
pedal while observing the APP Sensor 3
parameter with the scan tool.

Does the scan tool indicate less than the specified
value during depressing or releasing the pedal?

1.2 volts

Go to Step 3

Go to Step 13

13

Observe the DTC Information with a scan tool.

Are there any DTCs that you have not diagnosed?

—

Go to DTC List

System OK

Step

Action

Value(s)

Yes

No

Step

Action

Value(s)

Yes

No

1

Did you perform the Diagnostic System Check -
Engine Controls?

—

Go to Step 2

Go to Diagnostic 

System Check - 
Engine 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.

Is DTC P0699 also set?

—

Go to DTC P0653

Go to Step 3

3

Fully depress and release the accelerator pedal
while observing the Accelerator Pedal Position
(APP) Sensor 3 parameter with a scan tool.

Does the scan tool indicate more than the specified
value during depressing or releasing the pedal?

4.8 volts

Go to Step 4

Go to Diagnostic 

Aids

4

1.

Turn OFF the ignition.

2.

Disconnect the APP sensor harness
connector.

3.

Connect a DMM between the signal circuit
(pin 6 of C-40) and a known good ground.

4.

Turn ON the ignition, with the engine OFF.

Is the DMM voltage more than the specified value?

5.3 volts

Go to Step 10

Go to Step 5

5

1.

Connect a test lamp between the signal circuit
(pin 6 of C-40) and a known good ground.

2.

Connect a DMM between the probe of the test
lamp and a known good ground.

Is the DMM voltage more than the specified value?

4.7 volts

Go to Step 9

Go to Step 6

6

Connect a 3-amp fused jumper wire between the
signal circuit and the low reference circuit of the
sensor 3 harness (pins 6 and 7 of C-40).

Is the APP Sensor 3 parameter less than the
specified value?

0.2 volts

Go to Step 11

Go to Step 7

6E-274   ENGINE CONTROL SYSTEM (4JK1/4JJ1)

7

1.

Test the low reference circuit between the
ECM (pin 23 of C-58) and the APP sensor (pin
7 of C-40) for an open circuit or high
resistance.

2.

Repair the circuit(s) as necessary.

Did you find and correct the condition?

—

Go to Step 15

Go to Step 8

8

1.

Test the signal circuit between the ECM (pin 8
of C-58) and the APP sensor (pin 6 of C-40)
for an open circuit or high resistance.

2.

Repair the circuit(s) as necessary.

Did you find and correct the condition?

—

Go to Step 15

Go to Step 12

9

1.

Test the signal circuit between the ECM (pin 8
of C-58) and the APP sensor (pin 6 of C-40)
for short to any 5 volts reference circuit.

2.

Repair the circuit(s) as necessary.

Did you find and correct the condition?

—

Go to Step 15

Go to Step 14

10

Important: The APP sensor 3 may be damaged if
the sensor signal circuit is shorted to a voltage
source.

1.

Test the signal circuit between the ECM (pin 8
of C-58) and the APP sensor (pin 6 of C-40)
for a short to battery or ignition voltage.

2.

Repair the circuit(s) as necessary.

Did you find and correct the condition?

—

Go to Step 15

Go to Step 14

11

1.

Inspect for an intermittent and for poor
connections at the harness connector of the
APP sensor (pins 6 and 7 of C-40).

2.

Repair the connection(s) as necessary.

Did you find and correct the condition?

—

Go to Step 15

Go to Step 13

12

1.

Turn OFF the ignition.

2.

Disconnect the ECM harness connector.

3.

Inspect for an intermittent and for poor
connections at the harness connector of the
ECM (pins 8 and 23 of C-58).

4.

Repair the connection(s) as necessary.

Did you find and correct the condition?

—

Go to Step 15

Go to Step 14

13

Replace the APP sensor. Refer to APP Sensor
Replacement.

Did you complete the replacement?

—

Go to Step 15

—

14

Important: Replacement ECM must be
programmed and learned.
Replace the ECM. Refer to ECM Replacement.

Did you complete the replacement?

—

Go to Step 15

—

Step

Action

Value(s)

Yes

No

 

 

 

 

 

 

 

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