Chrysler Town, Dodge Caravan. Manual — part 1165
TEST
ACTION
APPLICABILITY
4
Turn the ignition off.
Remove the A/C Clutch Relay from the IPM.
Disconnect the A/C Clutch harness connector.
Measure the voltage of the A/C Clutch Relay Output circuit.
Is the voltage above 1.0 volt?
All
Yes
→ Repair the A/C Clutch Relay Output circuit for a short to voltage.
Perform ROAD TEST VERIFICATION - VER-2.
No
→ Go To 5
5
Turn the ignition off.
Remove the A/C Clutch Relay from the IPM.
Disconnect the A/C Clutch harness connector.
Measure the resistance between ground and the A/C Clutch Relay Output circuit.
Is the resistance above 100 kohms?
All
Yes
→ Go To 6
No
→ Repair the A/C Clutch Relay Output circuit for a short to ground.
Inspect fuse and replace as necessary.
Perform ROAD TEST VERIFICATION - VER-2.
6
Turn the ignition off.
Remove the A/C Clutch Relay from the IPM.
Disconnect the A/C Clutch harness connector.
Measure the resistance of the A/C Clutch Relay Output circuit.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 7
No
→ Repair the A/C Clutch Relay Output circuit for an open.
Perform ROAD TEST VERIFICATION - VER-2.
7
Turn the ignition off.
Disconnect the A/C Clutch harness connector.
Using a 12-volt test light connected to 12-volts, check the A/C Clutch Ground circuit.
Does the test light illuminate brightly?
All
Yes
→ Go To 8
No
→ Repair the A/C Clutch Ground circuit for an open.
Perform ROAD TEST VERIFICATION - VER-2.
8
If there are no possible causes remaining, view repair.
All
Repair
Replace the A/C Clutch.
Perform ROAD TEST VERIFICATION - VER-2.
203
DRIVEABILITY - DIESEL
*CHECKING THE A/C CLUTCH OPERATION —
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 (Idle) for this step.
Is the voltage below 0.6 volt?
All
Yes
→ Go To 2
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
→ Go To 3
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 3.7 volts with the accelerator pedal fully depressed?
All
Yes
→ Test Complete.
No
→ Replace the Accelerator Pedal Position Sensor in accordance with
the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
204
DRIVEABILITY - DIESEL
Symptom:
*CHECKING THE BOOST PRESSURE SENSOR CALIBRATION
POSSIBLE CAUSES
TURBOCHARGER BOOST PRESSURE SENSOR CALIBRATION
TEST
ACTION
APPLICABILITY
1
Allow the engine to idle.
With the DRB, select Engine, Bosch then Sensors. Read the Boost Pressure Voltage.
Is the Boost Pressure Voltage between 1.50 and 2.00 volts?
All
Yes
→ Test Complete.
No
→ Replace the Turbocharger Boost Pressure Sensor.
Perform ROAD TEST VERIFICATION - VER-2.
205
DRIVEABILITY - DIESEL
Symptom:
*CHECKING THE ECM POWER AND GROUND CIRCUITS
POSSIBLE CAUSES
ECM GROUND CIRCUIT(S) OPEN
ECM/PCM RELAY CONTROL CIRCUIT OPEN
ECM/PCM RELAY OUTPUT CIRCUIT(S) OPEN
FUSED ECM/PCM RELAY BATTERY SUPPLY CIRCUIT OPEN
FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN
ECM/PCM RELAY
ECM/PCM RELAY CONTROL CIRCUIT SHORTED TO VOLTAGE
TEST
ACTION
APPLICABILITY
1
Turn the ignition off.
Disconnect the ECM harness connectors.
Using a 12-volt test light connected to 12-volts, check both of the ECM ground
circuits in ECM harness connector C1 cavities 1 and 2.
Did the test light illuminate for both cavities?
All
Yes
→ Go To 2
No
→ Repair the ECM Ground circuit(s) for an open.
Perform ROAD TEST VERIFICATION - VER-2.
2
Turn the ignition off.
Disconnect the ECM harness connectors.
Turn the ignition on.
Using a 12-volt test light connected to ground, check the Fused Ignition Switch
Output circuit in ECM harness connector C1 cavity 22.
Is the test light on?
All
Yes
→ Go To 3
No
→ Repair the Fused Ignition Switch Output circuit for an open.
Perform ROAD TEST VERIFICATION - VER-2.
3
Turn the ignition off.
Remove the ECM/PCM Relay from the IPM.
Using a 12-volt test light connected to ground, check the Fused ECM/PCM Relay
Battery Supply circuit in ECM/PCM Relay connector cavity 30.
Is the test light on?
All
Yes
→ Go To 4
No
→ Repair the Fused ECM/PCM Relay Battery Supply circuit(s) for
an open.
Perform ROAD TEST VERIFICATION - VER-2.
206
DRIVEABILITY - DIESEL
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