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2011 - RT - DODGE CARAVAN/CHRYSLER TOWN AND COUNTRY - 3.6L V6 V.V.T.

28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM), NGC/Diagnosis and Testing

P0688-AUTO SHUTDOWN RELAY SENSE CIRCUIT LOW

8787A

86

85

30

C3C1C1

25A15A

C1 C3 C3

1

29

10

3838

10

29

1

02897198

BATT A0

30 85

8687

1 1

22

9 149

319 282910 38

A209 F342

F342

F342 F342F342K51

F342A209

A209 A209 F342

20

RD

16

BR/WT

16

BR/WT

16

BR/WT

16

BR/WT

16

BR/WT20

BR/WT

16

BR/WT

20

RD

16

BR/WT

20

RD

20

RD

C2

TIPM

C5

TIPM

C2

TIPM

MODULE-

POWERTRAIN

CONTROL

RELAY-

AUTO

SHUT DOWNMODULE-

POWERTRAIN

CONTROL C3

MODULE-

POWERTRAIN

CONTROL C1

RELAY-

AUTO

SHUT

DOWN

FUSE

M28

FUSE

M19

FUSED ASD

RELAY

OUTPUT

FUSED

B(+)

FUSED ASD

RELAY

OUTPUT

ASD

RELAY

CONTROL

FUSED

B(+)

FUSED ASD

RELAY

OUTPUT

(IN TIPM)

(TIPM)(TIPM)

BLACK/NATURALBLACK/BLACK

For a complete wiring diagram, refer to the Wiring Information.

Theory of Operation

For information for ASD relay description and operation (Refer to 08 - Electrical/Ignition Control/RELAY, Auto ShutDown - Description).

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For specific relay location and type, (Refer to 04 - Vehicle Quick Reference/Fuse Locations and Types - Specifications).

• When Monitored:

With ignition key on. Battery voltage greater than 10 Volts.

• Set Condition:

No voltage sensed at the PCM when the ASD relay is energized. One Trip Fault. Three good trips to turn off theMIL.

Possible Causes

(A209) FUSED B+ CIRCUITS

(F342) ASD RELAY OUTPUT CIRCUIT OPEN

ASD RELAY

POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 28 - DTC-BasedDiagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

1. VERIFY ASD DTC

NOTE: If any O2 SENSOR HEATER CIRCUIT HIGH DTCs set along with P0688-AUTO SHUTDOWN RELAYSENSE CIRCUIT LOW, all of the O2 Sensor Heater Control circuits need to be checked for a short tobattery voltage.

NOTE: If any of the following component DTCs have set along with P0688, diagnose them first before continuing.Ignition Coil(s)Fuel Injector(s)ASD ControlASD Control Output (TIPM DTC)

1. With the scan tool, erase the DTC.

2. Attempt to start the engine. If the engine will not start, crank the engine for at least 15 seconds. It may be necessary torepeat several times.

Does the DTC reset?

Yes • Go To 2

No • Perform the INTERMITTENT CONDITION diagnostic procedure. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

2. ENGINE OPERATION

1. Attempt to start the engine.

Does the engine start?

Yes • Go To 3

No • Go To 4

3

3. (F342) ASD RELAY OUTPUT CIRCUIT OPEN

1. Turn the ignition off.

2. Remove the ASD Relay.

3. Disconnect the C1and C3 PCM harness connector.

CAUTION: Do not probe the PCM harness connectors.Probing the PCM harness connectors willdamage the PCM terminals resulting inpoor terminal to pin connection. Installthe PCM Pinout Box 8815A to performdiagnosis.

4. Measure the resistance of the (F342) ASD Relay Outputcircuit from the Relay connection to the appropriateterminals of the PCM Pinout Box 8815A .

Is the resistance below 5.0 Ohms?

Yes • Go To 7

No • Repair the open in the (F342) ASD RelayOutput circuits.

• Perform the POWERTRAIN VERIFICATIONTEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) -Standard Procedure).

02897618

30 86

8787A85

(IN TIPM)

RELAY- AUTO

SHUT DOWN

3

2

1

0

0

1

9

16

24

31

8

15

23

30

38

PCM PINOUT

BOX 8815

87

C3-19

C3-28

C1-38

4. ASD RELAY

1. Turn the ignition off.

2. Install a substitute relay in place of the ASD Relay. (Refer to 08 - Electrical/Ignition Control/RELAY, Auto ShutDown - Removal).

3. Ignition on, engine not running.

4. With the scan tool, erase DTCs.

5. Attempt to start the engine.

6. With the scan tool, select View DTCs.

Does the DTC reset?

Yes • Go To 5

No • Replace the ASD Relay.

• Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE,Powertrain Control (PCM) - Standard Procedure).

4

5. (A209) FUSED B+ CIRCUITS

1. Turn the ignition off.

2. Using a 12-volt test light connected to ground, probe the(A209) Fused B+ circuits at the Relay connection.

NOTE: The test light should be illuminated andbright. Compare the brightness to that of adirect connection to the battery.

Does the test light illuminate brightly?

Yes • Go To 6

No • Repair the open or short to ground in the(A209) Fused B+ circuits. Inspect the relatedfuse and repair as necessary.

• Perform the POWERTRAIN VERIFICATIONTEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) -Standard Procedure). 02897287

30 86

8787A85

(IN TIPM)

RELAY- AUTO

SHUT DOWN

3

2

1

0

0

30 86

6. (F342) ASD RELAY OUTPUT CIRCUIT OPEN

1. Disconnect the C1 and C3 PCM harness connector.

CAUTION: Do not probe the PCM harness connectors.Probing the PCM harness connectors willdamage the PCM terminals resulting inpoor terminal to pin connection. Installthe PCM Pinout Box 8815A to performdiagnosis.

2. Measure the resistance of the (F342) ASD Relay Outputcircuit from the Relay connection to the appropriateterminals of the PCM Pinout Box 8815A .

Is the resistance below 5.0 Ohms?

Yes • Go To 7

No • Repair the open in the (F342) ASD RelayOutput circuit.

• Perform the POWERTRAIN VERIFICATIONTEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) -Standard Procedure).

02897618

30 86

8787A85

(IN TIPM)

RELAY- AUTO

SHUT DOWN

3

2

1

0

0

1

9

16

24

31

8

15

23

30

38

PCM PINOUT

BOX 8815

87

C3-19

C3-28

C1-38

7. POWERTRAIN CONTROL MODULE (PCM)

1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the ASD Relay and thePowertrain Control Module (PCM).

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2. Look for any chafed, pierced, pinched or partially broken wires.

3. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the ASDRelay and Powertrain Control Module connectors.

4. Perform any Technical Service Bulletins that may apply.

Were there any problems found?

Yes • Repair as necessary.

• Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE,Powertrain Control (PCM) - Standard Procedure).

No • Replace and program the Powertrain Control Module in accordance with the Service Information. (Refer to 08- Electrical/Electronic Control Modules/MODULE, Powertrain Control - Removal).

• Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE,Powertrain Control (PCM) - Standard Procedure).