TEST ACTION APPLICABILITY
9 Ignition Off.
Connect the DRB to a functional Data Link Connector on another vehicle.
Turn the ignition on.
With the DRB, attempt to read trouble codes.
Did the DRB display ªNo Responseº?All
Ye s®Go To 10
No®Replace the initial vehicle's Powertrain Control Module.
Perform Powertrain Verification Test VER-1A.
10 Ignition Off.
Substitute another DRB Adapter Cable.
Ignition on, Engine not running.
With the DRB, attempt to read trouble codes.
Did the DRB display ªNo Responseº?All
Ye s®Go To 11
No®Replace the DRB Adapter Cable.
Perform Powertrain Verification Test VER-1A.
11 If there are no potential causes remaining, the Diagnostic Readout Box is assumed to
be defective.
View repair options.All
Repair
Have the DRB repaired or replaced.
Perform Powertrain Verification Test VER-1A.
12 Ignition Off.
Disconnect the TP Sensor Connector.
Note: Check connector-Clean/repair as necessary.
Turn the ignition on.
With a voltage, measure the Throttle Position Sensor 5±volt Supply circuit.
Is the voltage above 6.0 volts?All
Ye s®Repair the open grounds at the Powertrain Control Module
Cavities 10 and 50.
Perform the Powertrain Verification Test VER-1A
No®Go To 13
13 Ignition Off.
Disconnect the Powertrain Control Module.
Note: Check connector-Clean/repair as necessary.
Turn the ignition on.
With a voltmeter, measure Fused Ignition Switch Output Circuit.
Is the voltage above 10.0 volts?All
Ye s®Go To 14
No®Repair the open Fused Ignition Switch Output Circuit (check
Ignition Switch Fuse in PDC).
Perform Powertrain Verification Test VER-1A.
274
STARTING
*(NO RESPONSE(CONDITION ÐContinued
ProCarManuals.com
Symptom:
* CHECKING THE CAM AND CRANK SENSORS
POSSIBLE CAUSES
SECONDARY INDICATORS PRESENT
TEST ACTION APPLICABILITY
1 Ignition On, Engine Not Running
Note: Address all trouble codes before continuing.
Note: Ensure PCM Connectors are secure.
With the DRB, read the secondary indicators while cranking the engine.
Were there any secondary indicators present while cranking the engine?All
Ye s®Refer to Symptom list for further diagnostic test.
No®Go To 2
2 Ignition On, Engine Not Running
With the DRB in Input/Output display, monitor the current CMP and CKP states.
Crank the engine for at least 15 seconds.
Does the DRB show current CKP state9present9while cranking?All
Ye s®Go To 3
No®Refer to symptom P-0340 NO CRANK REFERENCE SIGNAL AT
PCM in the DRIVEABILITY category.
3 Ignition On, Engine Not Running
With the DRB in Input/Output display, monitor the current CMP and CKP states.
Crank the engine for at least 15 seconds.
Does the DRB show current CMP state9present9while cranking?All
Ye s®Refer to symptom * CHECKING THE SECONDARY IGNITION
SYSTEM in the STARTING category.
No®Refer to symptom P-0340 NO CAM SIGNAL AT PCM in the
DRIVEABILITY category.
276
STARTING
ProCarManuals.com
Symptom:
P-0740 TORQUE CONV CLUTCH, NO RPM DROP AT LOCKUP
When Monitored and Set Condition:
P-0740 TORQUE CONV CLUTCH, NO RPM DROP AT LOCKUP
When Monitored: Continuously when no matured or maturing Trouble Code and throttle
position >10% and constant for 4.4 seconds before TCC engagement requested: No TCC
solenoid circuit, any cam/crank-related code, VSS, any TPS-related code and Battery
voltage >11.0
Set Condition: Torque Converter malfunctions that are detected are the FTC not locking
up properly when desired, and the torque converter not unlocking properly when desired.
3 consecutive test failures over one trip will store the code. 2 bad trips will set the code.
POSSIBLE CAUSES
FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN
DIFF, SHAFT, OR GEARS DEFECTIVE
TCC SOL DEFECTIVE
TORQUE CONVERTER ASSEMBLY DEF OR TCC SOL STUCK
TRANSMISSION FLUID DIRTY OR LEVEL LOW
VEHICLE CONFIGURATION NON-STANDARD
TEST ACTION APPLICABILITY
1 Ignition On, Engine Not Running
With the DRB, read codes.
Is the Global Good Trip displayed and equal to 0?TRANSMISSION -
AUTOMATIC
3-SPD, 31TH
Ye s®Go To 2
No®Test Complete.
2 Ignition Off
At the9Cooler In9port puta0to300PSIgauge using a9T9. Ensure line is long
enough to reach in driver's side of vehicle so gauge can be monitored while driving.
Road test vehicle. Gear select in drive. While monitoring DRB, achieve 50 MPH.
While doing this, notice the gauge will read around 15 PSI until lockup is achieved
in 3rd gear. If the TCC Solenoid is operating properly, the gauge pressure will
fluctuate when lockup is achieved.
Did gauge fluctuate?TRANSMISSION -
AUTOMATIC
3-SPD, 31TH
Ye s®Go To 3
No®Refer to service instructions for proper service procedure on
Torque Converter Assembly or stuck TCC Solenoid and repair as
necessary.
Perform Powertrain Verification Test VER-5A.
302
TRANSMISSION
ProCarManuals.com
Symptom:
P-0743 TORQUE CONVERTER CLUTCH SOLENOID CIRCUIT
When Monitored and Set Condition:
P-0743 TORQUE CONVERTER CLUTCH SOLENOID CIRCUIT
When Monitored: With the ignition key on.
Set Condition: An open or shorted condition is detected in the Torque Converter Clutch
Solenoid Control Circuit.
POSSIBLE CAUSES
FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN
TORQUE CONVERTER CLUTCH SOLENOID DEFECTIVE
TCC SOLENOID CIRCUIT W/H INTERMITTENT DEFECT
TCC SOLENOID CIRCUIT W/H OBSERVABLE DEFECT
TCC SOLENOID CONTROL CIRCUIT OPEN
TCC SOLENOID CONTROL CIRCUIT SHORT TO GROUND
PCM DEFECTIVE (TCC SOLENOID CONTROL CIRCUIT)
TEST ACTION APPLICABILITY
1 Ignition On, Engine Not Running
With the DRB, read codes.
Is the Global Good Trip displayed and equal to 0?TRANSMISSION -
AUTOMATIC
3-SPD, 31TH
Ye s®Go To 2
No®Go To 7
2 Ignition Off
Disconnect the TCC Solenoid Connector.
Note: Check connectors - Clean/repair as necessary.
Key on.
With the Voltmeter, probe the voltage of the Fused Ignition Switch Output Circuit at
Solenoid Connector.
Is the voltage above 10.0 volts?TRANSMISSION -
AUTOMATIC
3-SPD, 31TH
Ye s®Go To 3
No®Repair the open Fused Ignition Switch Output Circuit..
Perform Powertrain Verification Test VER-5A.
304
TRANSMISSION
ProCarManuals.com
Symptom:
P-1899 PARK/NEUTRAL SWITCH STUCK IN PARK OR IN GEAR
When Monitored and Set Condition:
P-1899 PARK/NEUTRAL SWITCH STUCK IN PARK OR IN GEAR
When Monitored: With the transmission in Park, Neutral, or Drive and not in limp-in
mode.
Set Condition: This code is set if the PCM detects an incorrect Park/Neutral switch state
for a given mode of vehicle operation in two consecutive failures.
POSSIBLE CAUSES
P/N SWITCH SENSE CIRCUIT OPEN
PARK/NEUTRAL SWITCH SENSE CIRCUIT OPEN
PARK/NEUTRAL SWITCH SENSE CIRCUIT SHORT TO GROUND
PARK/NEUTRAL SWITCH SENSE CIRCUIT SHORT TO GROUND
PARK/NEUTRAL SWITCH WIRING HARNESS OBSERVABLE DEFECT
PARK/NEUTRAL SWITCH WIRING HARNESS OBSERVABLE DEFECT
PARK/NEUTRAL SWITCH DEFECTIVE
TRS DEFECTIVE
PCM DEF (P/N SWITCH)
PCM DEF (P/N SWITCH)
TEST ACTION APPLICABILITY
1 Ignition On, Engine Not Running.
With the DRB, read Park/Neutral Switch input state.
While moving gear selector in and out of Park and Reverse, watch DRB Display.
Did the display show9P/N and D/R9?TRANSMISSION -
AUTOMATIC
3-SPD, 31TH
Ye s®Go To 2
No®Go To 3
2 Ignition Off.
Inspect the Wiring and Connector relating to Park/Neutral Position Switch.
Were any problems found?TRANSMISSION -
AUTOMATIC
3-SPD, 31TH
Ye s®Repair as necessary.
Perform Powertrain Verification Test VER-5A.
No®Test Complete.
307
TRANSMISSION
ProCarManuals.com
TEST ACTION APPLICABILITY
3 Ignition Off.
Disconnect the PCM Connector.
Note: Check connectors - Clean/repair as necessary.
Using an Ohmmeter, measure between the Park/Neutral Switch Sense Circuit at the
PCM Connector and Ground.
While moving Gear Selector between Park and Reverse, watch Ohmmeter display.
Did the display switch from below 5.0 ohms to above 5.0 ohms?TRANSMISSION -
AUTOMATIC
3-SPD, 31TH
Ye s®Replace the PCM.
Perform Powertrain Verification Test VER-5A.
No®Go To 4
4 Ignition Off.
Disconnect the PCM Connector.
Note: Check connectors - Clean/repair as necessary.
Using an Ohmmeter, measure between the Park/Neutral Switch Sense Circuit at the
PCM Connector and Ground.
While moving gear selector between Park and Reverse, watch Ohmmeter display.
Did the display stay below 5.0 ohms at all times?TRANSMISSION -
AUTOMATIC
3-SPD, 31TH
Ye s®Repair the P/N Switch Sense Circuit for a short to Ground.
Perform Powertrain Verification Test VER-5A.
No®Go To 5
5 Ignition Off.
Disconnect the PCM.
Disconnect the Park/Neutral Position Switch Connector.
Note: Check connectors - Clean/repair as necessary.
With an Ohmmeter, measure the Park/Neutral Switch Sense Circuit from the PCM
to the Switch.
Is the resistance below 5.0 ohms?TRANSMISSION -
AUTOMATIC
3-SPD, 31TH
Ye s®Go To 6
No®Repair open P/N Switch Sense Circuit.
Perform Powertrain Verification Test VER-5A.
6 If there are no potential causes remaining, the P/N Position Switch is assumed to be
defective.
View repair options.TRANSMISSION -
AUTOMATIC
3-SPD, 31TH
Repair
Replace the Park/Neutral Position Switch.
Perform Powertrain Verification Test VER-5A.
7 Ignition On, Engine Not Running.
With the DRB, read Park/Neutral Switch input state.
While moving gear selector in and out of Park and Reverse, watch DRB Display.
Did the display show9P/N and D/R9?TRANSMISSION -
AUTOMATIC
4-SPD, 41TE
and/or TRANSMIS-
SION - AUTO-
STICK Ye s®Go To 8
No®Go To 9
308
TRANSMISSION
P-1899 PARK/NEUTRAL SWITCH STUCK IN PARK OR IN GEAR Ð
Continued
ProCarManuals.com
TEST ACTION APPLICABILITY
8 Ignition Off.
Inspect the Wiring and Connector relating to Park/Neutral Position Switch.
Were any problems found?TRANSMISSION -
AUTOMATIC
4-SPD, 41TE
and/or TRANSMIS-
SION - AUTO-
STICK
Ye s®Repair as necessary.
Perform Powertrain Verification Test VER-5A.
No®Test Complete.
9 Ignition Off.
Disconnect the PCM Connector.
Note: Check connectors - Clean/repair as necessary.
Using an Ohmmeter, measure between the Park/Neutral Switch Sense Circuit at the
PCM Connector and Ground.
While moving Gear Selector between Park and Reverse, watch Ohmmeter display.
Did the display switch from below 5.0 ohms to above 5.0 ohms?TRANSMISSION -
AUTOMATIC
4-SPD, 41TE
and/or TRANSMIS-
SION - AUTO-
STICK
Ye s®Replace the PCM.
Perform Powertrain Verification Test VER-5A.
No®Go To 10
10 Ignition Off.
Disconnect the PCM Connector.
Note: Check connectors - Clean/repair as necessary.
Using an Ohmmeter, measure between the Park/Neutral Switch Sense Circuit at the
PCM Connector and Ground.
While moving gear selector between Park and Reverse, watch Ohmmeter display.
Did the display stay below 5.0 ohms at all times?TRANSMISSION -
AUTOMATIC
4-SPD, 41TE
and/or TRANSMIS-
SION - AUTO-
STICK
Ye s®Repair the P/N Switch Sense Circuit for a short to Ground.
Perform Powertrain Verification Test VER-5A.
No®Go To 11
11 Ignition Off.
Disconnect the PCM.
Disconnect the Transmission Range Sensor (TRS) Connector.
Note: Check connectors - Clean/repair as necessary.
With an Ohmmeter, measure the Park/Neutral Switch Sense Circuit from the PCM
to the TRS.
Is the resistance below 5.0 ohms?TRANSMISSION -
AUTOMATIC
4-SPD, 41TE
and/or TRANSMIS-
SION - AUTO-
STICK
Ye s®Go To 12
No®Repair open Park/Neutral Switch Sense Circuit.
Perform Powertrain Verification Test VER-5A.
12 If there are no potential causes remaining, the Transmission Range Sensor is
assumed to be defective.
View repair options.TRANSMISSION -
AUTOMATIC
4-SPD, 41TE
and/or TRANSMIS-
SION - AUTO-
STICK
Repair
Replace the TRS.
Perform Powertrain Verification Test VER-5A.
309
TRANSMISSION
P-1899 PARK/NEUTRAL SWITCH STUCK IN PARK OR IN GEAR Ð
Continued
ProCarManuals.com
TEST ACTION APPLICABILITY
1 Using the DRB, erase the codes.
Turn ingition off.
Wait 10 seconds.
Turn ignition on.
Using the DRB, read the codes.
Does the DRB display the code that was previously erased?All
Ye s®Go To 2
No®Go To 4
2 Turn ignition off.
Note: Visually inspect the related wiring harness. Look for any chafed,
pierced, pinched, or partially broken wires.
Note: Visually inspect the related wire harness connectors. Look for broken,
bent, pushed out, or corroded terminals.
Note: Refer to any Technical Service Bulletins (TSB) that may apply.
Were any problems found?All
Ye s®Repair as necessary.
Perform the Powertrain Verification Test VER-7A.
No®Go To 3
3 Replace the Sentry Key Immobilizer Module.
Using the DRB, erase the codes.
Drive vehicle. Perform several key cycles.
Does the code appear?All
Ye s®Replace the Powertrain Control Module.
Perform the Powertrain Verification Test VER-7A.
No®Test Complete.
4 Turn ignition off.
Note: Visually inspect the related wiring harness. Look for any chafed,
pierced, pinched, or partially broken wires.
Note: Visually inspect the related wire harness connectors. Look for broken,
bent, pushed out, or corroded terminals.
Note: Refer to any Technical Service Bulletins (TSB) that may apply.
Were any problems found?All
Ye s®Repair wiring harness/connectors as necessary.
Perform the Powertrain Verification Test VER-7A.
No®Test Complete.
312
SENTRY KEY IMMOBILIZER SYSTEM
PCM STATUS FAILURE ÐContinued
ProCarManuals.com