speed sensor CHRYSLER VOYAGER 2002 Owner's Guide
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Page 353 of 2399
(M) Check Engine Lamp (MIL) will illuminate during engine operation if this Diagnostic Trouble Code was recorded.
(G) Generator Lamp Illuminated
GENERIC
SCAN TOOL
CODEDRB SCAN TOOL DISPLAY DESCRIPTION OF DIAGNOSTIC TROUBLE CODE
P0178 Flex Fuel Sensor Volts Too Low Flex fuel sensor input below minimum acceptable voltage.
P0179 Flex Fuel Sensor Volts Too High Flex fuel sensor input above maximum acceptable voltage.
P0201 (M) Injector #1 Control Circuit An open or shorted condition detected in control circuit for
injector #1 or the INJ 1 injector bank.
P0202 (M) Injector #2 Control Circuit An open or shorted condition detected in control circuit for
injector #2 or the INJ 2 injector bank.
P0203 (M) Injector #3 Control Circuit An open or shorted condition detected in control circuit for
injector #3 or the INJ 3 injector bank.
P0204 (M) Injector #4 Control Circuit Injector #4 or INJ 4 injector bank output driver stage does
not respond properly to the control signal.
P0205 (M) Injector #5 Control Circuit Injector #5 output driver stage does not respond properly to
the control signal.
P0206 (M) Injector #6 Control Circuit Injector #6 output driver stage does not respond properly to
the control signal.
P0207 Injector #7 Control Circuit Injector #7 output driver stage does not respond properly to
the control signal.
P0208 Injector #8 Control Circuit Injector #8 output driver stage does not respond properly to
the control signal.
P0209 Injector #9 Control Circuit Injector #9 output driver stage does not respond properly to
the control signal.
P0210 Injector #10 Control Circuit Injector #10 output driver stage does not respond properly to
the control signal.
P0234 Boost Limit Exceeded
P0243 Wastegate Solenoid Circuit
P0300 (M) Multiple Cylinder Mis-fire Misfire detected in multiple cylinders.
P0301 (M) CYLINDER #1 MISFIRE Misfire detected in cylinder #1.
P0302 (M) CYLINDER #2 MISFIRE Misfire detected in cylinder #2.
P0303 (M) CYLINDER #3 MISFIRE Misfire detected in cylinder #3.
P0304 (M) CYLINDER #4 MISFIRE Misfire detected in cylinder #4.
P0305 (M) CYLINDER #5 MISFIRE Misfire detected in cylinder #5.
P0306 (M) CYLINDER #6 MISFIRE Misfire detected in cylinder #6.
P0307 (M) CYLINDER #7 MISFIRE Misfire detected in cylinder #7
P0308 (M) CYLINDER #8 MISFIRE Misfire detected in cylinder #8.
P0309 (M) CYLINDER #9 MISFIRE Misfire detected in cylinder #9.
P0310 (M) CYLINDER #10 MISFIRE Misfire detected in cylinder #10.
P0315 No Crank Sensor Learned Unable to learn the crank senor's signal in preparation for
misfire diagnostics.
P0320 No Crank Reference Signal at PCM No reference signal (crankshaft position sensor) detected
during engine cranking.
P0325 Knock Sensor #1 Circuit Knock sensor (#1) signal above or below minimum
acceptable threshold voltage at particular engine speeds.
8E - 16 ELECTRONIC CONTROL MODULESRS
POWERTRAIN CONTROL MODULE (Continued)
ProCarManuals.com
Page 354 of 2399
(M) Check Engine Lamp (MIL) will illuminate during engine operation if this Diagnostic Trouble Code was recorded.
(G) Generator Lamp Illuminated
GENERIC
SCAN TOOL
CODEDRB SCAN TOOL DISPLAY DESCRIPTION OF DIAGNOSTIC TROUBLE CODE
P0330 Knock Sensor #2 Circuit Knock sensor (#2) signal above or below minimum
acceptable threshold voltage at particular engine speeds.
P0335 Crankshaft Position Sensor Circuit A rationality error has been detected for loss of crankshaft
position sensor.
P0339 Crankshaft Position Sensor Circuit
IntermittentA rationality error has been detected for intermittent loss of
crankshaft position sensor.
P0340 (M) Camshaft Position Sensor Circuit A rationality error has been detected for loss of camshaft
position sensor.
P0344 Camshaft Position Sensor Circuit
IntermittentA rationality error has been detected for intermittent loss of
camshaft position sensor.
P0350 Ignition Coil Draws Too Much Current A coil (1-5) is drawing too much current.
P0351 (M) Ignition Coil Primary # 1 Circuit Peak primary circuit current not achieved with maximum
dwell time.
P0352 (M) Ignition Coil Primary # 2 Circuit Peak primary circuit current not achieved with maximum
dwell time.
P0353 (M) Ignition Coil Primary # 3 Circuit Peak primary circuit current not achieved with maximum
dwell time.
P0354 (M) Ignition Coil Primary# 4 Circuit Peak primary circuit current not achieved with maximum
dwell time (High Impedance).
P0355 (M) Ignition Coil Primary # 5 Circuit Peak primary circuit current not achieved with maximum
dwell time (High Impedance).
P0356 (M) Ignition Coil Primary # 6 Circuit Peak primary circuit current not achieved with maximum
dwell time (high impedance).
P0357 Ignition Coil Primary # 7 Circuit Peak primary circuit current not achieved with maximum
dwell time (high impedance).
P0358 Ignition Coil Primary # 8 Circuit Peak primary circuit current not achieved with maximum
dwell time (high impedance).
P0400 Diesel EGR System Failure
P0401 (M) EGR System Failure Required change in air/fuel ration not detected during
diagnostic test.
P0403 (M) EGR Solenoid Circuit An open or shorted condition detected in the EGR solenoid
control circuit.
P0404 (M) EGR Position Sensor Rationality EGR position sensor signal does not correlate to EGR duty
cycle.
P0405 (M) EGR Position Sensor Volts Too Low EGR position sensor input below the acceptable voltage
range.
P0406 (M) EGR Position Sensor Volts Too High EGR position sensor input above the acceptable voltage
range.
P0412 Secondary Air Solenoid Circuit An open or shorted condition detected in the secondary air
(air switching/aspirator) solenoid control circuit.
P0420 (M) 1/1 Catalytic Converter Efficiency Catalyst 1/1 efficiency below required level.
P0432 (M) 1/2 Catalytic Converter Efficiency Catalyst 2/1 efficiency below required level.
P0440 General EVAP System Failure General system failure.
RSELECTRONIC CONTROL MODULES8E-17
POWERTRAIN CONTROL MODULE (Continued)
ProCarManuals.com
Page 355 of 2399
(M) Check Engine Lamp (MIL) will illuminate during engine operation if this Diagnostic Trouble Code was recorded.
(G) Generator Lamp Illuminated
GENERIC
SCAN TOOL
CODEDRB SCAN TOOL DISPLAY DESCRIPTION OF DIAGNOSTIC TROUBLE CODE
P0441 (M) Evap Purge Flow Monitor Insufficient or excessive vapor flow detected during
evaporative emission system operation.
P0442 (M) Evap Leak Monitor 0.040 Leak
DetectedA 0.040 leak has been detected in the evaporative system.
P0443 (M) Evap Purge Solenoid Circuit An open or shorted condition detected in the EVAP purge
solenoid control circuit.
P0452 NVLD Pressure Switch Stuck Closed NVLD pressure switch stuck closed.
P0453 NVLD Pressure Switch Stuck Open NVLD pressure switch stuck open.
P0455 (M) Evap Leak Monitor Large Leak
DetectedA large leak has been detected in the evaporative system.
P0456 (M) Evap Leak Monitor 0.020 Leak
DetectedA 0.020 leak has been detected in the evaporative system.
P0460 Fuel Level Unit No Change Over Miles No movement of fuel level sender detected.
P0461 Fuel Level Unit No Changeover Time No level of fuel level sender detected.
P0462 Fuel Level Sending Unit Volts Too Low Fuel level sensor input below acceptable voltage.
P0463 Fuel Level Sending Unit Volts Too
HighFuel level sensor input above acceptable voltage.
P0480 Low Speed Fan Relay Control Circuit An open or shorted condition detected in the low speed rad.
fan relay control circuit.
P0481 High Speed Fan Relay Control Circuit An open or shorted condition detected in the high speed rad.
fan relay control circuit.
P0498 NVLD Canister Vent Valve Solenoid
Circuit LowA shorted low condition detected in NVLD solenoid circuit.
P0499 NVLD Canister Vent Valve Solenoid
Circuit HighA shorted high condition detected in NVLD solenoid circuit.
P0500 (M) No Vehicle Speed Sensor Signal No vehicle speed sensor signal detected during road load
conditions.
P0501 Vehicle Speed Sensor #1 Performance A rationality error has been detected for no vehicle speed
sensor signal detected during road load conditions.
P0505 (M) Idle Air Control Motor Circuits Replace idle air control motor.
P0508 (M) Idle Air Control Motor Circuit Low Idle Air Control Motor Circuit input below acceptable current
P0509 (M) Idle Air Control Motor Circuit High Idle Air Control Motor Circuit input above acceptable current
P0511 Idle Air Control Valve Solenoid Circuit An open or shorted condition detected in the IAC control
circuit.
P0513 Invalid SKIM Key The engine controller has received an invalid key from the
Smart Key Immobilizer Module.
P0516 Battery Temperature Sensor Low Battery Temp. sensor input below minimum acceptable
voltage.
P0517 Battery Temperature Sensor High Battery Temp. sensor input above maximum acceptable
voltage.
P0519 Idle Speed Performance A rationality error has been detected for target RPM not met
during drive idle condition. Possible Vacuum leak or IAC lost
steps.
8E - 18 ELECTRONIC CONTROL MODULESRS
POWERTRAIN CONTROL MODULE (Continued)
ProCarManuals.com
Page 356 of 2399
(M) Check Engine Lamp (MIL) will illuminate during engine operation if this Diagnostic Trouble Code was recorded.
(G) Generator Lamp Illuminated
GENERIC
SCAN TOOL
CODEDRB SCAN TOOL DISPLAY DESCRIPTION OF DIAGNOSTIC TROUBLE CODE
P0522 Oil Pressure Sens Low Oil pressure sensor input below acceptable voltage.
P0523 Oil Pressure Sens High Oil pressure sensor input above acceptable voltage.
P0532 A/C Pressure Sensor Low A/C pressure sensor input below the minimum acceptable
voltage.
P0533 A/C Pressure Sensor High A/C pressure sensor input above the maximum acceptable
voltage.
P0551 (M) Power Steering Switch Failure Incorrect input state detected for the power steering switch
circuit. PL: High pressure seen at high speed.
P0562 Battery Voltage Low Battery voltage sense input below the minimum acceptable
voltage.
P0563 Battery Voltage High Battery voltage sense input above the maximum acceptable
voltage.
P0579 Speed Control Switch #1 Performance Cruise switch stuck in a valid voltage range.
P0580 Speed Control Switch #1 Low Speed control switch input below minimum acceptable
voltage.
P0581 Speed Control Switch #1 High Speed control switch input above maximum acceptable
voltage.
P0582 Speed Control Vacuum Solenoid
CircuitAn open or shorted condition detected in speed control
Vacuum solenoid control circuit.
P0586 Speed Control Vent Solenoid Circuit An open or shorted condition detected in speed control vent
solenoid control circuit.
P0594 Speed Control Servo Power Circuit An open or shorted condition open/short condition detected
in the speed control servo power control circuit.
P0600 (M) PCM Failure SPI Communications No communication detected between co-processors in the
control module.
P0601 (M) Internal Controller Failure Internal control module fault condition (check sum) detected.
P0604 Internal Trans Controller Transmission control module RAM self test fault detected.
-Aisin transmission.
P0605 Internal Trans Controller Transmission control module ROM self test fault detected
-Asian transmission.
P0615 Starter Relay Circuit Open or shorted condition detected in the starter relay
control circuit.
P0622 (G) Generator Field Not Switching Properly An open or shorted condition detected in the generator field
control circuit.
P0627 Fuel Pump Relay Circuit An open or shorted condition detected in the fuel pump relay
control circuit.
P0630 VIN Not Programmed In PCM VIN is not programmed in the control module EEPROM.
P0632 Odometer Not Programmed In PCM Odometer is not programmed in the control module
EEPROM.
P0633 SKIM Key Not Programmed In PCM SKIM secert key is not programmed in the control module
EEPROM.
P0645 A/C Clutch Relay Circuit An open or shorted condition detected in the A/C clutch relay
control circuit.
RSELECTRONIC CONTROL MODULES8E-19
POWERTRAIN CONTROL MODULE (Continued)
ProCarManuals.com
Page 357 of 2399
(M) Check Engine Lamp (MIL) will illuminate during engine operation if this Diagnostic Trouble Code was recorded.
(G) Generator Lamp Illuminated
GENERIC
SCAN TOOL
CODEDRB SCAN TOOL DISPLAY DESCRIPTION OF DIAGNOSTIC TROUBLE CODE
P0660 Manifold Tune Valve Solenoid Circuit An open or shorted condition detected in the manifold tuning
valve solenoid control circuit.
P0685 ASD Relay Control Circuit An open or shorted condition detected in the ASD relay
control circuit.
P0688 ASD Relay Sense Circuit Low ASD voltage sensed when ASD relay is energized or ASD
voltage not sensed when ASD relay is not energized.
P0700 (M) Check Transmission DTC's This SBEC III or JTEC DTC indicates that the EATX has an
active fault and has requested illuminated the MIL via a BUS
message. The specific fault must be acquired from the
EATX.
P0703 (M) Brake Switch Stuck Pressed or
ReleasedIncorrect input state detected in the brake switch circuit.
(Changed from P1595).
P0711 Trans Temp Sensor, No Temp Rise
After StartRelationship between the transmission temperature and
overdrive operation and/or TCC operation indicates a failure
of the Transmission Temperature Sensor. OBD II Rationality.
P0712 Trans Temp Sensor Voltage Too Low Transmission fluid temperature sensor input below
acceptable voltage.
P0713 Trans Temp Sensor Voltage Too High Transmission fluid temperature sensor input above
acceptable voltage.
P0720 Low Output SPD Sensor RPM, Above
15 MPHThe relationship between the Output Shaft Speed Sensor
and vehicle speed is not within acceptable limits.
P0740 (M) Torque Con Clu, No RPM Drop at
LockupRelationship between engine and vehicle speeds indicated
failure of torque convertor clutch lock-up system (TCC/PTU
sol).
P0743 Torque Converter Clutch Solenoid/
Trans Relay CircuitsAn open or shorted condition detected in the torque
converter clutch (part throttle unlock) solenoid control circuit.
Shift solenoid C electrical fault - Asian transmission
P0748 Governor Pressure Sol Control/Trans
Relay CircuitsAn open or shorted condition detected in the Governor
Pressure Solenoid circuit or Trans Relay Circuit in JTEC RE
transmissions.
P0751 O/D Switch Pressed (Lo) More Than 5
MinutesOverdrive override switch input is in a prolonged depressed
state.
P0753 Trans 3-4 Shift Sol/Trans Relay
CircuitsAn open or shorted condition detected in the overdrive
solenoid control circuit or Trans Relay Circuit in JTEC RE
transmissions.
P0756 AW4 Shift Sol B (2-3) Functional
FailureShift solenoid B (2-3) functional fault - Asian transmission
P0783 3-4 Shift Sol, No RPM Drop at Lockup The overdrive solenoid is unable to engage the gear change
from 3rd gear to the overdrive gear.
P0801 Reverse Gear Lockout Circuit Open or
ShortAn open or shorted condition detected in the transmission
reverse gear lock-out solenoid control circuit.
P0833 Clutch Upstop Switch Performance Rationality error detected for clutch upstop switch
performance
8E - 20 ELECTRONIC CONTROL MODULESRS
POWERTRAIN CONTROL MODULE (Continued)
ProCarManuals.com
Page 359 of 2399
(M) Check Engine Lamp (MIL) will illuminate during engine operation if this Diagnostic Trouble Code was recorded.
(G) Generator Lamp Illuminated
GENERIC
SCAN TOOL
CODEDRB SCAN TOOL DISPLAY DESCRIPTION OF DIAGNOSTIC TROUBLE CODE
P1298 Lean Operation at Wide Open Throttle A prolonged lean condition is detected during Wide Open
Throttle.
P1299 (M) Vacuum Leak Found (IAC Fully
Seated)MAP Sensor signal does not correlate to Throttle Position
Sensor signal. Possible vacuum leak.
P1388 Auto Shutdown Relay Control Circuit An open or shorted condition detected in the ASD or CNG
shutoff relay control ckt.
P1389 No ASD Relay Output Voltage At PCM No Z1 or Z2 voltage sensed when the auto shutdown relay is
energized.
P1390 (M) Timing Belt Skipped 1 Tooth or More Relationship between Cam and Crank signals not correct.
P1391 (M) Intermittent Loss of CMP or CKP Loss of the Cam Position Sensor or Crank Position sensor
has occurred. For PL 2.0L
P1398 (M) Mis-Fire Adaptive Numerator at Limit PCM is unable to learn the Crank Sensor's signal in
preparation for Misfire Diagnostics. Probable defective Crank
Sensor.
P1399 Wait To Start Lamp Circuit An open or shorted condition detected in the Wait to Start
Lamp circuit.
P1403 No 5 Volts to EGR Sensor Loss of 5v feed to the EGR position sensor.
P1476 Too Little Secondary Air Insufficient flow of secondary air injection detected during
aspirator test.(was P0411)
P1477 Too Much Secondary Air Excessive flow of secondary air injection detected during
aspirator test (was P0411).
P1478 (M) Battery Temp Sensor Volts Out of Limit Internal temperature sensor input voltage out of an
acceptable range.
P1479 Transmission Fan Relay Circuit An open or shorted condition detected in the transmission
fan relay circuit.
P1480 PCV Solenoid Circuit An open or shorted condition detected in the PCV solenoid
circuit.
P1481 EATX RPM Pulse Performance ETAX RPM pulse generator signal for misfire detection does
not correlate with expected value.
P1482 Catalyst Temperature Sensor Circuit
Shorted LowCatalyst temperature sensor circuit shorted low.
P1483 Catalyst Temperature Sensor Circuit
Shorted High.Catalyst temperature sensor circuit shorted high.
P1484 Catalytic Converter Overheat Detected A catalyst overheat condition has been detected by the
catalyst temperature sensor.
P1485 Air Injection Solenoid Circuit An open or shorted condition detected in the air assist
solenoid circuit.
P1486 (M) Evap Leak Monitor Pinched Hose
FoundLDP has detected a pinched hose in the evaporative hose
system.
P1487 Hi Speed Rad Fan CTRL Relay Circuit An open or shorted condition detected in the control circuit of
the #2 high speed radiator fan control relay.
P1488 Auxiliary 5 Volt Supply Output Too Low Auxiliary 5 volt sensor feed is sensed to be below an
acceptable limit.
8E - 22 ELECTRONIC CONTROL MODULESRS
POWERTRAIN CONTROL MODULE (Continued)
ProCarManuals.com
Page 360 of 2399
(M) Check Engine Lamp (MIL) will illuminate during engine operation if this Diagnostic Trouble Code was recorded.
(G) Generator Lamp Illuminated
GENERIC
SCAN TOOL
CODEDRB SCAN TOOL DISPLAY DESCRIPTION OF DIAGNOSTIC TROUBLE CODE
P1489 (M) High Speed Fan CTRL Relay Circuit An open or shorted condition detected in the control circuit of
the high speed radiator fan control relay.
P1490 (M) Low Speed Fan CTRL Relay Circuit An open or shorted condition detected in control circuit of the
low speed radiator fan control relay.
P1491 Rad Fan Control Relay Circuit An open or shorted condition detected in the radiator fan
control relay control circuit. This includes PWM solid state
relays.
P1492 (M,G) Ambient/Batt Temp Sen Volts Too High External temperature sensor input above acceptable voltage.
P1493 (M,G) Ambient/Batt Temp Sen Volts Too Low External temperature sensor input below acceptable voltage.
P1494 (M) Leak Detection Pump Sw or
Mechanical FaultIncorrect input state detected for the Leak Detection Pump
(LDP) pressure switch.
P1495 (M) Leak Detection Pump Solenoid Circuit An open or shorted condition detected in the Leak Detection
Pump (LDP) solenoid circuit.
P1496 (M) 5 Volt Supply, Output Too Low 5 volt sensor feed is sensed to be below an acceptable limit.
( < 4v for 4 sec ).
P1498 High Speed Rad Fan Ground CTRL
Rly CircuitAn open or shorted condition detected in the control circuit of
the #3 high speed radiator fan control relay.
P1594 (G) Charging System Voltage Too High Battery voltage sense input above target charging voltage
during engine operation.
P1595 Speed Control Solenoid Circuits An open or shorted condition detected in either of the speed
control vacuum or vent solenoid control circuits.
P1596 Speed Control Switch Always High Speed control switch input above maximum acceptable
voltage.
P1597 Speed Control Switch Always Low Speed control switch input below minimum acceptable
voltage.
P1598 A/C Pressure Sensor Volts Too High A/C pressure sensor input above maximum acceptable
voltage.
P1599 A/C Pressure Sensor Volts Too Low A/C pressure sensor input below minimum acceptable
voltage.
P1602 (M) PCM not Programmed PCM not programmed (generic controller fault).
P1603 PCM Internal Dual Port Ram
CommunicationDual port RAM communication link error.
P1604 PCM Internal Dual Port Ram
Read/Write Integrity FailureDual port RAM read/write error.
P1607 PCM internal Shutdown Timer
RationalityA rationality error has been detected for the shutdown timer.
P1680 Clutch Released Switch Circuit
P1681 No I/P Cluster CCD/J1850 Messages
ReceivedNo CCD/J1850 messages received from the cluster control
module.
P1682 (G) Charging System Voltage Too Low Battery voltage sense input below target charging voltage
during engine operation and no significant change in voltage
detected during active test of generator output circuit.
RSELECTRONIC CONTROL MODULES8E-23
POWERTRAIN CONTROL MODULE (Continued)
ProCarManuals.com
Page 361 of 2399
(M) Check Engine Lamp (MIL) will illuminate during engine operation if this Diagnostic Trouble Code was recorded.
(G) Generator Lamp Illuminated
GENERIC
SCAN TOOL
CODEDRB SCAN TOOL DISPLAY DESCRIPTION OF DIAGNOSTIC TROUBLE CODE
P1683 SPD CTRL PWR Relay; or S/C 12v
Driver CKTAn open or shorted condition detected in the speed control
servo power control circuit. (SBECII: ext relay).
P1684 Battery Loss In The Last 50 Starts The battery has been disconnected within the last 50 starts.
P1685 Skim Invalid Key The engine controller has received an invalid key from the
SKIM.
P1686 No SKIM BUS Messages Received No CCD/J1850 messages received from the Smart Key
Immobilizer Module (SKIM).
P1687 No MIC BUS Message No CCD/J1850 messages received from the Mechanical
Instrument Cluster (MIC) module.
P1693 DTC Detected in Companion Module A fault has been generated in the companion engine control
module.
P1694 Fault In Companion Module No CCD/J1850 messages received from the powertrain
control module-Aisin transmission.
P1695 No CCD/J1850 Message From Body
Control ModuleNo CCD/J1850 messages received from the body control
module.
P1696 (M) PCM Failure EEPROM Write Denied Unsuccessful attempt to write to an EEPROM location by the
control module.
P1697 (M) PCM Failure SRI Mile Not Stored Unsuccessful attempt to update Service Reminder Indicator
(SRI or EMR) mileage in the control module EEPROM.
P1698 (M) No CCD/J1850 Message From TCM No CCD/J1850 messages received from the electronic
transmission control module (EATX) or the Aisin transmission
controller.
P1719 Skip Shift Solenoid Circuit An open or shorted condition detected in the transmission
2-3 gear lock-out solenoid control circuit.
P1740 TCC or O/D Solenoid Performance Rationality error detected in either the torque convertor
clutch or solenoid or overdrive solenoid system.
P1756 GOV Press Not Equal to Target @
15-20 PSIThe requested pressure and the actual pressure are not
within a tolerance band for the Governor Control System
which is used to regulate governor pressure to control shifts
for 1st, 2nd, and 3rd gear. (Mid Pressure Malfunction)
P1757 GOV Press Not Equal to Target @
15-20 PSIThe requested pressure and the actual pressure are not
within a tolerance band for the Governor Control System
which is used to regulate governor pressure to control shifts
for 1st, 2nd, and 3rd gear (Zero Pressure Malfunction)
P1762 Gov Press Sen Offset Volts Too Low
or HighThe Governor Pressure Sensor input is greater than a
calibration limit or is less than a calibration limit for 3
consecutive park/neutral calibrations.
P1763 Governor Pressure Sensor Volts Too
HiThe Governor Pressure Sensor input is above an acceptable
voltage level.
P1764 Governor Pressure Sensor Volts Too
LowThe Governor Pressure Sensor input is below an acceptable
voltage level.
P1765 Trans 12 Volt Supply Relay CTRL
CircuitAn open or shorted condition is detected in the Transmission
Relay control circuit. This relay supplies power to the TCC
P1899 (M) P/N Switch Stuck in Park or in Gear Incorrect input state detected for the Park/Neutral switch.
8E - 24 ELECTRONIC CONTROL MODULESRS
POWERTRAIN CONTROL MODULE (Continued)
ProCarManuals.com
Page 365 of 2399
TRANSMISSION CONTROL
MODULE
DESCRIPTION
The Transmission Control Module (TCM) is located
behind the left fender and is fastened with three
screws to three clips in the left frame rail forward of
the suspension (Fig. 14).
OPERATION
The TCM is the controlling unit for all electronic
operations of the transaxle. The TCM receives infor-
mation regarding vehicle operation from both direct
and indirect inputs, and selects the operational mode
of the transaxle. Direct inputs are hardwired to, and
used specifically by the TCM. Indirect inputs origi-
nate from other components/modules, and are shared
with the TCM via the J1850 communication bus.Some examples ofdirect inputsto the TCM are:
²Battery (B+) voltage
²Ignition ªONº voltage
²Transmission Control Relay (Switched B+)
²Throttle Position Sensor
²Crankshaft Position Sensor (CKP)
²Transmission Range Sensor (TRS)
²Pressure Switches (L/R, 2/4, OD)
²Transmission Temperature Sensor (Integral to
TRS)
²Input Shaft Speed Sensor
²Output Shaft Speed Sensor
Some examples ofindirect inputsto the TCM are:
²Engine/Body Identification
²Manifold Pressure
²Target Idle
²Torque Reduction Confirmation
²Speed Control ON/OFF Switch
²Engine Coolant Temperature
²Ambient/Battery Temperature
²Brake Switch Status
²DRB Communication
Based on the information received from these var-
ious inputs, the TCM determines the appropriate
shift schedule and shift points, depending on the
present operating conditions and driver demand.
This is possible through the control of various direct
and indirect outputs.
Some examples of TCMdirect outputsare:
²Transmission Control Relay
²Solenoids (LR/CC, 2/4, OD and UD)
²Vehicle Speed (to PCM)
²Torque Reduction Request (to PCM)
An example of a TCMindirect outputis:
²Transmission Temperature (to PCM)
In addition to monitoring inputs and controlling
outputs, the TCM has other important responsibili-
ties and functions:
²Storing and maintaining Clutch Volume Indices
(CVI)
²
Storing and selecting appropriate Shift Schedules
²System self-diagnostics
²Diagnostic capabilities (with DRB scan tool)
Fig. 14 Transmission Control Module (TCM)
Location
1 - TRANSMISSION CONTROL MODULE (TCM)
8E - 28 ELECTRONIC CONTROL MODULESRS
ProCarManuals.com
Page 366 of 2399
CLUTCH VOLUME INDEX (CVI)
An important function of the TCM is to monitor
Clutch Volume Index (CVI). CVIs represent the vol-
ume of fluid needed to compress a clutch pack.
The TCM monitors gear ratio changes by monitor-
ing the Input and Output Speed Sensors. The Input,
or Turbine Speed Sensor sends an electrical signal to
the TCM that represents input shaft rpm. The Out-
put Speed Sensor provides the TCM with output
shaft speed information.
By comparing the two inputs, the TCM can deter-
mine transaxle gear ratio. This is important to the
CVI calculation because the TCM determines CVIs
by monitoring how long it takes for a gear change to
occur (Fig. 15).
Gear ratios can be determined by using the DRB
Scan Tool and reading the Input/Output Speed Sen-
sor values in the ªMonitorsº display. Gear ratio can
be obtained by dividing the Input Speed Sensor value
by the Output Speed Sensor value.
For example, if the input shaft is rotating at 1000
rpm and the output shaft is rotating at 500 rpm,
then the TCM can determine that the gear ratio is
2:1. In direct drive (3rd gear), the gear ratio changes
to 1:1. The gear ratio changes as clutches are applied
and released. By monitoring the length of time it
takes for the gear ratio to change following a shift
request, the TCM can determine the volume of fluid
used to apply or release a friction element.
The volume of transmission fluid needed to apply
the friction elements are continuously updated for
adaptive controls. As friction material wears, the vol-
ume of fluid need to apply the element increases.
Certain mechanical problems within the clutch
assemblies (broken return springs, out of position
snap rings, excessive clutch pack clearance, improper
assembly, etc.) can cause inadequate or out-of-rangeclutch volumes. Also, defective Input/Output Speed
Sensors and wiring can cause these conditions. The
following chart identifies the appropriate clutch vol-
umes and when they are monitored/updated:
CLUTCH VOLUMES
ClutchWhen Updated
Proper Clutch
Volume
Shift Sequence Oil Temperature Throttle Angle
L/R2-1 or 3-1 coast
downshift>70É <5É 35to83
2/4 1-2 shift
> 110É5 - 54É20 to 77
OD 2-3 shift 48 to 150
UD 4-3 or 4-2 shift > 5É 24 to 70
Fig. 15 Example of CVI Calculation
1 - OUTPUT SPEED SENSOR
2 - OUTPUT SHAFT
3 - CLUTCH PACK
4 - SEPARATOR PLATE
5 - FRICTION DISCS
6 - INPUT SHAFT
7 - INPUT SPEED SENSOR
8 - PISTON AND SEAL
RSELECTRONIC CONTROL MODULES8E-29
TRANSMISSION CONTROL MODULE (Continued)
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