TEST ACTION APPLICABILITY
8 Ignition On, Engine Not Running.
With the DRB, read codes.
With the DRB, actuate the Evap Purge Solenoid.
Wiggle Wiring Harness from the Solenoid to PCM.
Does the Evap Purge Solenoid Control Circuit code return?ALL
Ye s®Repair as necessary where wiggling caused problem to appear.
Perform Powertrain Verification Test VER-5A.
No®Go To 9
9 Ignition Off.
Using the Schematic as a guide, inspect the Wiring and Connectors.
Were any problems found?ALL
Ye s®Repair as necessary.
Perform Powertrain Verification Test VER-5A.
No®Go To 10
10 Check the freeze frame data to determine the conditions when code was set.
Attempt duplication of 'freeze frame' conditions for added diagnostics.
If there are no other possible causes remaining there is assumed to be an9intermit-
tent9problem with a Wiring Harness Connector or Wire.
View repair options.ALL
Repair
Visually inspect related Wire Harness Connectors and Harnesses.
Look for broken, bent, pushed out, or corroded terminals and for
chafed, pierced, or partiallly broken wire, respectively. Refer to
any hotlines or technical service bulletins that apply.
11 Ignition On, Engine Not Running.
With the DRB, actuate the Evap Purge Solenoid.
With the DRB, read codes.
Is the Global Good Trip displayed and equal to 0?ALL
Ye s®Go To 12
No®Go To 18
12 Ignition Off.
Disconnect Proportional Purge Solenoid Connector.
Note: Check connectors - Clean/repair as necessary.
Using an Ohmmeter, measure the resistance of the Proportional Purge Solenoid.
Is the resistance 14.2 ohms +/- 1.4?ALL
Ye s®Go To 13
No®Replace the open Proportional Purge Solenoid.
Perform Powertrain Verification Test VER-5A.
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DRIVEABILITY
P-0443 EVAP PURGE SOLENOID CIRCUIT ÐContinued
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TEST ACTION APPLICABILITY
16 Ignition Off.
Disconnect Proportional Purge Solenoid Connector.
Note: Check connectors - Clean/repair as necessary.
Disconnect the battery.
Note: Check connectors - Clean/repair as necessary.
Disconnect the Powertrain Control Module.
Note: Check connectors - Clean/repair as necessary.
Using and Ohmmeter, measure the PWM Purge Sense Circuit PCM to Solenoid
Connector.
Is the resistance below 5.0 ohms?ALL
Ye s®Go To 17
No®Repair the open PWM Purge Sense Circuit.
Perform Powertrain Verification Test VER-5A.
17 If there are no potential causes remaining, the Powertrain Control Module is
assumed to be defective.
View repair options.ALL
Repair
Replace the Powertrain Control Module.
Perform Powertrain Verification Test VER-5A.
18 Ignition On, Engine Not Running.
With the DRB, actuate the Evap Purge Solenoid.
With the DRB, read codes.
Wiggle Wiring Harness from the Solenoid to PCM.
Does the Evap Purge Solenoid Control Circuit code return?ALL
Ye s®Repair as necessary where wiggling caused problem to appear.
Perform Powertrain Verification Test VER-5A.
No®Go To 19
19 Ignition Off.
Using the schematic as a guide, inspect the Wiring and Connectors.
Were any problems found?ALL
Ye s®Repair as necessary.
Perform Powertrain Verification Test VER-5A.
No®Go To 20
20 Check the freeze frame data to determine the conditions when code was set.
Attempt duplication of 'freeze frame' conditions for added diagnostics.
If there are no other possible causes remaining there is assumed to be an9intermit-
tent9problem with a Wiring Harness Connector or Wire.
View repair options.ALL
Repair
Visually inspect related Wire Harness Connectors and Harnesses.
Look for broken, bent, pushed out, or corroded terminals and for
chafed, pierced, or partiallly broken wire, respectively. Refer to
any hotlines or technical service bulletins that apply.
147
DRIVEABILITY
P-0443 EVAP PURGE SOLENOID CIRCUIT ÐContinued
ProCarManuals.com
TEST ACTION APPLICABILITY
4 Check the freeze frame data to determine the conditions when code was set.
Attempt duplication of 'freeze frame' conditions for added diagnostics.
If there are no other possible causes remaining there is assumed to be an9intermit-
tent9problem with a Wiring Harness Connector or Wire.
View repair options.All
Repair
Visually inspect related Wire Harness Connectors and Harnesses.
Look for broken, bent, pushed out, or corroded terminals and for
chafed, pierced, or partiallly broken wire, respectively. Refer to
any hotlines or technical service bulletins that apply.
5 Ignition Off
Disconnect the LDP Solenoid.
Note: Check connectors - Clean/repair as necessary.
Key on.
Using a Voltmeter, measure the voltage of the Fused Ignition Switch Output Circuit
at the Solenoid Connector.
Is the voltage above 10.0 volts?All
Ye s®Go To 6
No®Repair the open Fused Ignition Switch Output Circuit.
Perform Powertrain Verification Test VER-6A.
6 Ignition Off
Disconnect the LDP Solenoid.
Note: Check connectors - Clean/repair as necessary.
Disconnect the PCM.
Note: Check connectors - Clean/repair as necessary.
Using an Ohmmeter, measure the resistance of the LDP Solenoid Control Circuit at
the PCM Connector to ground.
Is the resistance below 5.0 ohms?All
Ye s®Repair the LDP Solenoid Circuit for a short to ground.
Perform Powertrain Verification Test VER-6A.
No®Go To 7
7 Ignition Off
Disconnect the LDP Solenoid.
Note: Check connectors - Clean/repair as necessary.
Disconnect the PCM.
Note: Check connectors - Clean/repair as necessary.
With an Ohmmeter, measure the resistance of the LDP Solenoid Control Circuit from
the PCM Connector to the LDP Connector.
Is the resistance below 5.0 ohms?All
Ye s®Go To 8
No®Repair the open LDP Solenoid Control Circuit.
Perform Powertrain Verification Test VER-6A.
210
DRIVEABILITY
P-1495 LEAK DETECTION PUMP SOLENOID CIRCUIT ÐContinued
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Symptom:
P-1695 NO CCD MESSAGE FROM BODY CONTROLLER
When Monitored and Set Condition:
P-1695 NO CCD MESSAGE FROM BODY CONTROLLER
When Monitored: Anytime the engine is running.
Set Condition: No CCD messages are received from the BCM for 30 seconds.
POSSIBLE CAUSES
CCD BUS (+) CIRCUIT OPEN
CCD BUS (-) CIRCUIT OPEN
WIRING HARNESS OBSERVABLE DEFECT
BCM9NO RESPONSE9
PCM DEF (NO CCD MSG)
TEST ACTION APPLICABILITY
1 Ignition on with engine not running.
Erase trouble codes.
Start engine and allow to run for 1 minute.
With the DRB, read trouble codes.
Does display show9No CCD messages from Body Control Module9and a start run
counter of zero?All
Ye s®Go To 2
No®Go To 6
2 Ignition off.
Disconnect the PCM Connectors.
Disconnect the BCM Connectors.
Note: Check Connectors - clean/repair as necessary.
Using an ohmmeter, measure the CCD Bus (+) Circuit from the PCM to the BCM.
Is the resistance below 5.0 ohms?All
Ye s®Go To 3
No®Repair the open CCD Bus (+) Ckt between BCM and PCM.
Perform Verification Test VER-2A.
3 Ignition off.
Disconnect the PCM Connectors.
Disconnect the BCM Connectors.
Note: Check Connectors - clean/repair as necessary.
Using an ohmmeter, measure the CCD (-) Circuit for resistance from PCM to the
BCM.
Is the resistance below 5.0 ohms?All
Ye s®Go To 4
No®Repair the open CCD Bus (-) Ckt between BCM and PCM.
Perform Verification Test VER-2A.
220
DRIVEABILITY
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TEST ACTION APPLICABILITY
4 Ignition on with engine not running.
With the DRB, select BCM.
Does the DRB display show9No response9?All
Ye s®Replace the BCM.
Perform Verification Test VER-2A.
No®Go To 5
5 If there are no potential causes remaining, the PCM is assumed to be defective.
View repair options.All
Repair
Replace the PCM.
Perform Verification Test VER-2A.
6 Ignition off.
Using the schematic as a guide, inspect the Wiring and Connectors.
Were any problems found?All
Ye s®Repair as necessary.
Perform Verification Test VER-2A.
No®Test Complete.
221
DRIVEABILITY
P-1695 NO CCD MESSAGE FROM BODY CONTROLLER ÐContinued
ProCarManuals.com
TEST ACTION APPLICABILITY
3 Ignition Off
Disconnect the PCM Connectors.
Disconnect the TCM Connector.
Note: Check connectors - Clean/repair as necessary.
Using an Ohmmeter, measure the CCD Bus (+) Circuit between the PCM and TCM
Connectors.
Is the resistance below 5.0 ohms?All
Ye s®Go To 4
No®Repair the open CCD Bus (+) Circuit between PCM and TCM.
Perform Powertrain Verification Test VER-2A.
4 Ignition Off
Disconnect the PCM Connectors.
Disconnect the TCM Connector.
Note: Check connectors - Clean/repair as necessary.
Using an Ohmmeter, measure the CCD Bus (-) Circuit between the PCM and TCM
Connectors.
Is the resistance below 5.0 ohms?All
Ye s®Go To 5
No®Repair the open CCD Bus (-) Circuit between the PCM and TCM.
Perform Powertrain Verification Test VER-2A.
5 Key On
Using the DRB under9Transmission9select941TE9.
Does the DRB display show9No Response9?All
Ye s®Replace the Transmission Control Module.
Perform Powertrain Verification Test VER-2A.
No®Go To 6
6 If there are no potential causes remaining, the Powertrain Control Module is
assumed to be defective.
View repair options.All
Repair
Replace the PCM.
Perform Powertrain Verification Test VER-2A.
7 Ignition Off
Using the schematic as a guide, inspect the Wiring and Connectors.
Were any problems found?All
Ye s®Repair as necessary.
Perform Powertrain Verification Test VER-2A.
No®Test Complete.
225
DRIVEABILITY
P-1698 NO CCD MESSAGES FROM TCM ÐContinued
ProCarManuals.com
Symptom List:
P-1595 SPEED CONTROL SOLENOID CIRCUITS
P-1683 SPEED CONTROL POWER RELAY OR S/C 12V DRIVER
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be P-1595 SPEED CONTROL SOLE-
NOID CIRCUITS.
When Monitored and Set Condition:
P-1595 SPEED CONTROL SOLENOID CIRCUITS
When Monitored: Speed control on, vehicle speed > 25 mph, RPM < 5440, brake not
applied. For an automatic transmission, in drive mode. For a manual transmission, the
clutch not depressed.
Set Condition: The powertrain control module (PCM) actuates the vacuum and vent
solenoid but they do not respond.
P-1683 SPEED CONTROL POWER RELAY OR S/C 12V DRIVER
When Monitored: Speed control on, vehicle speed > 25 mph, RPM < 5440, brake not
applied. For an automatic transmission, in drive mode. For a manual transmission, the
clutch not depressed.
Set Condition: The powertrain control module (PCM) actuates the vacuum and vent
solenoids but they do not respond.
POSSIBLE CAUSES
S/C BRAKE SWITCH OUTPUT CIRCUIT OPEN
S/C BRAKE SWITCH OUTPUT CIRCUIT SHORTED TO GROUND
S/C VACUUM SOLENOID CONTROL CIRCUIT OPEN
S/C VENT SOLENOID CONTROL CIRCUIT OPEN
SPEED CONTROL POWER SUPPLY CIRCUIT OPEN
SPEED CONTROL SERVO GROUND CIRCUIT OPEN
BRAKE SWITCH DEFECTIVE
SPEED CONTROL SERVO DEFECTIVE
PCM DEFECTIVE (SC SOLENOID CIRCUIT)
PCM DEFECTIVE (SPEED CONTROL P/S CIRCUIT)
BRAKE SWITCH NEEDS TO BE ADJUSTED
256
SPEED CONTROL
ProCarManuals.com
Symptom:
*(NO RESPONSE(CONDITION
POSSIBLE CAUSES
IGNITION NOT ON
DIAGNOSTIC READ-OUT BOX ADAPTER CABLE DEFECTIVE
FUEL PUMP DEFECTIVE
FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN
PCM GROUNDS OPEN
FUEL PUMP RELAY OUT CKT INTERMITTENT SHORT TO GRND
FUEL PUMP RELAY OUTPUT CIRCUIT SHORT TO GROUND
SCI RECEIVE CIRCUIT OPEN
SCI RECEIVE CIRCUIT SHORT TO GROUND
SCI TRANSMIT CIRCUIT OPEN
SCI TRANSMIT CIRCUIT SHORTED TO GROUND
FUSED B(+) CIRCUIT OPEN BETWEEN FUSE AND BATTERY
DIAGNOSTIC READ-OUT BOX DEFECTIVE
PCM DEFECTIVE (NO RESPONSE)
FUSED B(+) CIRCUIT OPEN BETWEEN FUSE AND PCM
FUSED B(+) CIRCUIT SHORT TO GROUND
TEST ACTION APPLICABILITY
1 Attempt to start vehicle.
Does the vehicle start?All
Ye s®Go To 2
No®Go To 12
2 Was the Ignition on when the ªNo Responseº message was displayed? All
Ye s®Go To 3
No®Turn the ignition on to get a response.
3 Ignition off.
Using an Ohmmeter, measure the DLC ground circuit (terminals 4 and 5) to ground.
Is the resistance below 5.0 ohms for each measurement?All
Ye s®Go To 4
No®Repair the open ground circuit(s).
Perform Powertrain Verification Test VER-1A.
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STARTING
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