Dodge Dakota (R1). Manual — part 156
TEST
ACTION
APPLICABILITY
8
Turn the ignition on.
Connect one end of a jumper wire to ground and back probe the A/C Pressure Signal
circuit at the ECM harness connector.
With the DRB, select Engine, Bosch Controller then Inputs/Outputs.
Read the A/C H/L Press Sw status.
Does the DRB display A/C H/L Press Sw ON?
All
Yes
→
No
→
Replace and program the ECM in accordance with the Service
Information.
Perform ROAD TEST VERIFICATION - VER-2.
9
Disconnect the A/C High Pressure Switch harness connector.
Turn the ignition on.
Connect one end of a jumper wire to ground and back probe the A/C Pressure Signal
circuit at the A/C High Pressure Switch harness connector.
With the DRB, select Engine, Bosch Controller then Inputs/Outputs.
Read the A/C H/L Press Sw status.
Does the DRB display A/C H/L Press Sw ON?
All
Yes
→
No
→
Repair the A/C Pressure Signal circuit for an open between the
ECM and the A/C High Pressure Switch.
Perform ROAD TEST VERIFICATION - VER-2.
10
Turn the ignition off.
Disconnect the A/C High Pressure Switch harness connector.
Measure the resistance of the A/C High Pressure Switch.
Is the resistance below 10.0 ohms?
All
Yes
→
No
→
Replace the A/C High Pressure Switch.
Perform ROAD TEST VERIFICATION - VER-2.
11
Disconnect the A/C Low Pressure Switch harness connector.
Turn the ignition on.
Connect one end of a jumper wire to ground and the other end to the A/C Pressure
Sense circuit at the A/C Low Pressure Switch harness connector.
With the DRB, select Engine, Bosch Controller then Inputs/Outputs.
Read the A/C H/L Press Sw status.
Does the DRB display A/C H/L Press Sw ON?
All
Yes
→
No
→
Repair the A/C Pressure Sense circuit for an open between the
A/C High Pressure Switch and the A/C Low Pressure Switch.
Perform ROAD TEST VERIFICATION - VER-2.
12
Turn the ignition off.
Disconnect the A/C Low Pressure Switch harness connector.
Measure the resistance of the A/C Low Pressure Switch.
Is the resistance below 10.0 ohms?
All
Yes
→
Repair the ground circuit at the A/C Low Pressure Switch for an
open.
Perform ROAD TEST VERIFICATION - VER-2.
No
→
Replace the A/C Low Pressure Switch.
Perform ROAD TEST VERIFICATION - VER-2.
159
DRIVEABILITY - DIESEL
*CHECKING THE A/C SYSTEM —
Continued
TEST
ACTION
APPLICABILITY
13
Turn the ignition off.
Disconnect the PCM harness connectors.
Turn the ignition on.
With the DRB, select Engine, Bosch Controller then Inputs/Outputs.
While reading the A/C Switch input, use a jumper wire to connect the A/C Switch
Signal circuit to ground at the PCM harness connector.
Does the DRB display A/C Switch ON?
All
Yes
→
Replace and program the PCM in accordance with the Service
Information.
Perform ROAD TEST VERIFICATION - VER-2.
No
→
14
Turn the ignition off.
Disconnect the PCM harness connectors.
Disconnect the ECM harness connectors.
Measure the resistance between ground and the A/C Switch Signal circuit.
Is the resistance below 100.0 ohms?
All
Yes
→
Repair the A/C Switch Signal circuit for a short to ground.
Perform ROAD TEST VERIFICATION - VER-2.
No
→
15
Turn the ignition off.
Disconnect the PCM harness connectors.
Disconnect the ECM harness connectors.
Measure the resistance of the A/C Switch Signal circuit.
Is the resistance below 10.0 ohms?
All
Yes
→
Replace and program the ECM in accordance with the Service
Information.
Perform ROAD TEST VERIFICATION - VER-2.
No
→
Repair the A/C Switch Signal circuit for an open.
Perform ROAD TEST VERIFICATION - VER-2.
16
Turn the ignition off.
Disconnect the A/C Heater Control harness connectors.
Disconnect the PCM harness connectors.
Turn the ignition on.
Measure the voltage of the A/C Select Switch Sense circuit.
Is the voltage below 1.0 volt?
All
Yes
→
No
→
Repair the A/C Select Switch Sense circuit for a short to voltage.
Perform ROAD TEST VERIFICATION - VER-2.
17
Turn the ignition off.
Disconnect the A/C Heater Control harness connectors.
Disconnect the PCM harness connectors.
Measure the resistance between ground and the A/C Select Switch Sense circuit.
Is the resistance below 100.0 ohms?
All
Yes
→
Repair the A/C Select Switch Sense circuit for a short to ground.
Perform ROAD TEST VERIFICATION - VER-2.
No
→
160
DRIVEABILITY - DIESEL
*CHECKING THE A/C SYSTEM —
Continued
TEST
ACTION
APPLICABILITY
18
Turn the ignition off.
Disconnect the A/C Heater Control harness connectors.
Disconnect the PCM harness connectors.
Measure the resistance of the A/C Select Switch Sense circuit.
Is the resistance below 10.0 ohms?
All
Yes
→
No
→
Repair the A/C Select Switch Sense circuit for an open.
Perform ROAD TEST VERIFICATION - VER-2.
19
Turn the ignition off.
Disconnect the A/C Heater Control harness connectors.
Turn the ignition on.
With the DRB, select Engine, JTEC then Inputs/Outputs
Start the Engine.
Connect a jumper wire between the A/C Select Switch Sense circuit and ground at the
A/C Heater Control harness connector.
With the DRB, read the A/C Select Switch status.
Does the DRB display A/C Select Switch YES?
All
Yes
→
Refer to symptom list for problems related to A/C Select Switch
operation.
Perform ROAD TEST VERIFICATION - VER-2.
No
→
Replace and program the PCM in accordance with the Service
Information.
Perform ROAD TEST VERIFICATION - VER-2.
161
DRIVEABILITY - DIESEL
*CHECKING THE A/C SYSTEM —
Continued
Symptom:
*CHECKING THE ACCELERATOR PEDAL POSITION SENSOR
CALIBRATION
POSSIBLE CAUSES
APP SENSOR
APP SENSOR - IDLE
APP SENSOR - WOT
TEST
ACTION
APPLICABILITY
1
NOTE: Ensure the Accelerator pedal is free from any restriction or binding
before continuing.
Turn the ignition on.
While back probing, measure the voltage of the APP Sensor Signal circuit at the
ECM.
NOTE: The accelerator pedal must be released for this step.
Is the voltage below 1.0 volt?
All
Yes
→
No
→
Replace the Accelerator Pedal Position Sensor in accordance with
the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
2
Turn the ignition on.
While back probing, measure the voltage of the APP Sensor Signal circuit at the
ECM.
Monitor the voltmeter while slowly pressing the accelerator pedal completely down.
Did the voltage increase smoothly with pedal travel?
All
Yes
→
No
→
Replace the Accelerator Pedal Position Sensor in accordance with
the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
3
Turn the ignition on.
While back probing, measure the voltage of the APP Sensor Signal circuit at the
ECM.
Press the accelerator pedal completely down.
Is the voltage above 3.5 volts?
All
Yes
→
Test Complete.
No
→
Replace the Accelerator Pedal Position Sensor in accordance with
the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
162
DRIVEABILITY - DIESEL
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст