2001 CHRYSLER VOYAGER ESP

Symptom:
P0600-SERIAL COMMUNICATION LINK MALFUNCTION
When Monitored and Set Condition:
P0600-SERIAL COMMUNICATION LINK MALFUNCTION
When Monitored: Continuously with engine running.
Set Condition: The DTC sets in approximately 20 seconds if no BUS messages are
received by the TCM.
POSSIBLE CAUSES
NO COMMUNICATION WITH MIC
NO COMMUNICATION WITH PCM
INTERMITTENT WIRING AND CONNECTORS
TCM - INTERNAL ERROR
TEST ACTION APPLICABILITY
1 With the DRBIIIt, erase TCM DTC's.
Note: Erase P0700 DTC in the PCM to turn the MIL light off after making
transmission repairs.
Start the engine in park.
Did the DTC reset after the engine was started?All
Ye s®Go To 2
No®Go To 5
2 Ignition on, engine not running.
With the DRBIIIt, attempt communication with the MIC
Can you communicate with the MIC?All
Ye s®Go To 3
No®Refer to the Communication category for the related symptom(s).
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
3 Ignition on, engine not running.
With the DRBIIIt, select the following screens in order:9BODY99MIC99MONITOR
DISPLAY99PCI BUS ENGINE INFO9.
Does the DRBIIIt, read9NO RESPONSE9from any of the listed PCM monitors?All
Ye s®Refer to Communication Category for the related symptom(s).
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No®Go To 4
4 If there are no possible causes remaining, view repair. All
Repair
Replace the TCM. WITH THE DRBIIItPERFORM QUICK
LEARN AND REPROGRAM PINION FACTOR.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
26
TRANSMISSION

Symptom:
P0731-GEAR RATIO ERROR IN 1ST
When Monitored and Set Condition:
P0731-GEAR RATIO ERROR IN 1ST
When Monitored: The Transmission Gear Ratio is monitored continuously while the
Transmission is in gear.
Set Condition: If the ratio of the input RPM to the output RPM does not match the
current Gear Ratio.
POSSIBLE CAUSES
RELATED DTC'S PRESENT
INTERMITTENT GEAR RATIO ERRORS
TRANSMISSION - INTERNAL
TEST ACTION APPLICABILITY
1NOTE: Low fluid level can be the cause of many Transmission problems. If
the fluid level is low locate and repair the leak then check and adjust the
fluid level per the Service Information.
NOTE: Always perform diagnostics with a fully charged battery to avoid
false symptoms.
With the DRBIIIt, read the engine DTC's. Check and repair all engine DTC's prior
to performing Transmission Symptom Diagnostics.
With the DRBIIIt, read Transmission DTC's. Record all DTC's and 1 Trip Failures.
NOTE: Diagnose 1 Trip Failures as a fully matured DTC.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
Repair as necessary.
Perform the Shift Lever Position Test. If the test does not pass, refer to Symptom test
for P0705 Check Shifter Signal.
For Gear Ratio DTC's, check and record all CVI's.
Most DTC's set on start up but some must be set by driving the vehicle such that all
diagnostic monitors have run.
NOTE: Verify flash level of Transmission Control Module. Some problems
are corrected by software upgrades to the Transmission Control Module.
NOTE: Check for applicable TSB's related to the symptom.
Perform this procedure prior to Symptom diagnosis.All
Continue
Go To 2
2 With the DRBIIIt, read Transmission DTC's
If any of these DTC's are present, perform their respective tests first.
Are DTC's P1791, P0715, P0720, P1794, P1720, present also?All
Ye s®Refer to appropriate symptom in the Transmission category. If
any of these DTC's are present, they will cause a gear ratio error.
Go to test for P1791 first if it is present.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No®Go To 3
51
TRANSMISSION

TEST ACTION APPLICABILITY
2 With the DRBIIIt, read Transmission DTC's
If any of these DTC's are present, perform their respective tests first.
Are DTC's P1791, P0715, P0720, P1794, P1720, present also?All
Ye s®Refer to appropriate symptom in the Transmission category. If
any of these DTC's are present, they will cause a gear ratio error.
Go to test for P1791 first if it is present.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No®Go To 3
3NOTE: Low fluid level can be the cause of many transmission problems.
Check and adjust the fluid level per the Service Information.
With the DRBIIIt, perform the 2nd gear clutch test. Follow the instructions on the
DRBIIIt.
Increase the throttle angle, TPS Degree, to 30É for no more than a few seconds.
CAUTION: Do not overheat the transmission.
Did the clutch test pass, Input speed remain at 0?All
Ye s®Go To 4
No®Go To 5
4 The conditions to set this DTC are not present at this time.
Check the gearshift linkage adjustment.
Gear ratio DTC's can be set by problems in the Input and Output Speed Sensor
circuits. If the vehicle passes the clutch test and still sets Gear Ratio DTC(s), check
the Speed Sensors for proper operation.
NOTE: Remove the Starter Relay from the PDC. This will prevent the
vehicle from being started in gear.
Check the Speed Sensor wiring and connectors for good connection, then perform a
wiggle test using the Transmission Simulator, Miller tool #8333 and the FWD
Adapter Cable kit, Miller tool #8333-1.
This DTC can also be set under extreme temperature conditions, this is usually
caused by an internal problem. Verify if the problem is only experienced under
extreme hot or cold conditions.
Were there any problems found?All
Ye s®Repair as necessary.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No®Test Complete.
5 With the DRBIIIt, read Transmission DTC's.
Is a DTC P1788 - 2/4 Hydraulic Pressure Switch and/or P1782 - 2/4 Pressure Switch
present also?All
Ye s®Replace the Solenoid/Pressure switch assembly.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No®Go To 6
6 If there are no possible causes remaining, view repair. All
Repair
Repair internal transmission problem. If the transmission is to be
repaired, check all of the components related to the Underdrive
and 2/4 clutches. Inspect the pump per service information and
repair as necessary.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
54
TRANSMISSION
P0732-GEAR RATIO ERROR IN 2ND ÐContinued

TEST ACTION APPLICABILITY
2 With the DRBIIIt, read Transmission DTC's
If any of these DTC's are present, perform their respective tests first.
Are DTC's P1791, P0715, P0720, P1794, P1720, present also?All
Ye s®Refer to appropriate symptom in the Transmission category. If
any of these DTC's are present, they will cause a gear ratio error.
Go to test for P1791 first if it is present.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No®Go To 3
3NOTE: Low fluid level can be the cause of many transmission problems.
Check and adjust the fluid level per the Service Information.
With the DRBIIIt, perform the 3rd gear clutch test. Follow the instructions on the
DRBIIIt.
Increase the throttle angle, TPS Degree, to 30É for no more than a few seconds.
CAUTION: Do not overheat the transmission.
Did the clutch test pass, Input speed remain at 0?All
Ye s®Go To 4
No®Go To 5
4 The conditions to set this DTC are not present at this time.
Check the gearshift linkage adjustment.
Gear ratio DTC's can be set by problems in the Input and Output Speed Sensor
circuits. If the vehicle passes the clutch test and still sets Rear Ratio DTC(s), check
the Speed Sensors for proper operation.
NOTE: Remove the Starter Relay from the PDC. This will prevent the
vehicle from being started in gear.
Check the speed sensor wiring and connectors for good connection, then perform a
wiggle test using the Transmission Simulator, Miller tool #8333 and the FWD
Adapter Cable kit, Miller tool #8333-1.
This DTC can also be set under extreme temperature conditions, this is usually
caused by an internal problem. Verify if the problem is only experienced under
extreme hot or cold conditions.
Were there any problems found?All
Ye s®Repair as necessary.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No®Test Complete.
5 With the DRBIIIt, read Transmission DTC's.
Is a DTC P1787 - OD Hydraulic Pressure Switch and/or P1781 - OD Pressure Switch
present also?All
Ye s®Replace the Solenoid/Pressure switch assembly.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No®Go To 6
6 If there are no possible causes remaining, view repair. All
Repair
Repair internal transmission problem. If the transmission is to be
repaired, check all of the components related to the Underdrive
and Overdrive clutches. Inspect the pump per service information
and repair as necessary.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
56
TRANSMISSION
P0733-GEAR RATIO ERROR IN 3RD ÐContinued

TEST ACTION APPLICABILITY
2 With the DRBIIIt, read Transmission Control Module DTC's
If any of these DTC's are present, perform their respective tests first.
Are DTC's P1791, P0715, P0720, P1794, P1720, present also?All
Ye s®Refer to appropriate symptom in the Transmission category. If
any of these DTC's are present, they will cause a gear ratio error.
Go to test P1791 first if it is present.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No®Go To 3
3NOTE: Low fluid level can be the cause of many transmission problems.
Check and adjust the fluid level per the Service Information. If the fluid
level is low, locate and repair the leak before returning the vehicle to the
customer.
With the DRBIIIt, perform the 4th gear clutch test. Follow the instructions on the
DRBIIIt.
Increase the throttle angle, TPS Degree, to 30É for no more than a few seconds.
CAUTION: Do not overheat the transmission.
Did the clutch test pass, Input Speed remain at 0?All
Ye s®Go To 4
No®Go To 5
4 The conditions to set this DTC are not present at this time.
Check the gearshift linkage adjustment.
Gear Ratio DTC's can be set by problems in the Input and Output Speed Sensor
circuits. If the vehicle passes the clutch test and still sets Gear Ratio DTC(s), check
the Speed Sensors for proper operation.
NOTE: Remove the Starter Relay from the PDC. This will prevent the
vehicle from being started in gear.
Check the Speed Sensor wiring and connectors for good connection, then perform a
wiggle test using the Transmission Simulator, Miller tool #8333 and the FWD
Adapter Cable kit, Miller tool #8333-1.
This DTC can also be set under extreme temperature conditions, this is usually
caused by an internal problem. Verify if the problem is only experienced under
extreme hot or cold conditions.
Were there any problems found?All
Ye s®Repair as necessary.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No®Test Complete.
5 With the DRBIIIt, read Transmission DTC's.
Is a DTC P1788 - 2/4 Hydraulic Pressure Switch and/or P1782 - 2/4 Pressure Switch
present also?All
Ye s®Replace the Solenoid/Pressure switch assembly.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No®Go To 6
6 If there are no possible causes remaining, view repair. All
Repair
Repair internal transmission problem. If the transmission is to be
repaired, check all of the components related to the Overdrive and
2/4 clutches. Inspect the pump per service information and repair
as necessary.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
58
TRANSMISSION
P0734-GEAR RATIO ERROR IN 4TH ÐContinued

Symptom:
P0736-GEAR RATIO ERROR IN REVERSE
When Monitored and Set Condition:
P0736-GEAR RATIO ERROR IN REVERSE
When Monitored: The Transmission Gear Ratio is monitored continuously while the
Transmission is in Gear.
Set Condition: If the ratio of the input RPM to the output RPM does not match the
current Gear Ratio.
POSSIBLE CAUSES
RELATED DTC'S PRESENT
INTERMITTENT GEAR RATIO ERRORS
TRANSMISSION - INTERNAL
TEST ACTION APPLICABILITY
1NOTE: Low fluid level can be the cause of many Transmission problems. If
the fluid level is low locate and repair the leak then check and adjust the
fluid level per the Service Information.
NOTE: Always perform diagnostics with a fully charged battery to avoid
false symptoms.
With the DRBIIIt, read the engine DTC's. Check and repair all engine DTC's prior
to performing Transmission Symptom Diagnostics.
With the DRBIIIt, read Transmission DTC's. Record all DTC's and 1 Trip Failures.
NOTE: Diagnose 1 Trip Failures as a fully matured DTC.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
Repair as necessary.
Perform the Shift Lever Position Test. If the test does not pass, refer to Symptom test
for P0705 Check Shifter Signal.
For Gear Ratio DTC's, check and record all CVI's.
Most DTC's set on start up but some must be set by driving the vehicle such that all
diagnostic monitors have run.
NOTE: Verify flash level of Transmission Control Module. Some problems
are corrected by software upgrades to the Transmission Control Module.
NOTE: Check for applicable TSB's related to the symptom.
Perform this procedure prior to Symptom diagnosis.All
Continue
Go To 2
2 With the DRBIIIt, read Transmission DTC's
If any of these DTC's are present, perform their respective tests first.
Are DTC's P1791, P0715, P0720, P1794, P1720, present also?All
Ye s®Refer to appropriate symptom in the Transmission category. If
any of these DTC's are present, they will cause a gear ratio error.
Go to test for P1791 first if it is present.
No®Go To 3
59
TRANSMISSION

Symptom:
P0750-LR SOLENOID CIRCUIT
When Monitored and Set Condition:
P0750-LR SOLENOID CIRCUIT
When Monitored: Initially at power-up, then every 10 seconds thereafter. The solenoids
will also be tested immediately after a Gear Ratio or Pressure Switch error is detected.
Set Condition: Three consecutive solenoid continuity test failures, or one failure if a test
is run in response to a Gear Ratio or Pressure Switch error.
POSSIBLE CAUSES
RELATED RELAY DTC'S PRESENT
INTERMITTENT WIRING AND CONNECTORS
TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT OPEN
L/R SOLENOID CONTROL CIRCUIT OPEN
L/R SOLENOID CONTROL CIRCUIT SHORT TO GROUND
L/R SOLENOID CONTROL CIRCUIT SHORT TO VOLTAGE
L/R SOLENOID INOPERATIVE
TCM - L/R SOLENOID
TEST ACTION APPLICABILITY
1NOTE: Low fluid level can be the cause of many Transmission problems. If
the fluid level is low locate and repair the leak then check and adjust the
fluid level per the Service Information.
NOTE: Always perform diagnostics with a fully charged battery to avoid
false symptoms.
With the DRBIIIt, read the engine DTC's. Check and repair all engine DTC's prior
to performing Transmission Symptom Diagnostics.
With the DRBIIIt, read Transmission DTC's. Record all DTC's and 1 Trip Failures.
NOTE: Diagnose 1 Trip Failures as a fully matured DTC.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
Repair as necessary.
Perform the Shift Lever Position Test. If the test does not pass, refer to Symptom test
for P0705 Check Shifter Signal.
For Gear Ratio DTC's, check and record all CVI's.
Most DTC's set on start up but some must be set by driving the vehicle such that all
diagnostic monitors have run.
NOTE: Verify flash level of Transmission Control Module. Some problems
are corrected by software upgrades to the Transmission Control Module.
NOTE: Check for applicable TSB's related to the symptom.
Perform this procedure prior to Symptom diagnosis.All
Continue
Go To 2
63
TRANSMISSION

Symptom:
P0755-2-4 SOLENOID CIRCUIT
When Monitored and Set Condition:
P0755-2-4 SOLENOID CIRCUIT
When Monitored: Initially at power-up, then every 10 seconds thereafter. They will also
be tested immediately after a Gear Ratio or Pressure Switch error is detected.
Set Condition: Three consecutive Solenoid continuity test failures, or one failure if test is
run in response to a Gear Ratio or Pressure Switch error.
POSSIBLE CAUSES
RELATED RELAY DTC'S PRESENT
INTERMITTENT WIRING AND CONNECTORS
TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT OPEN
2-4 SOLENOID CONTROL CIRCUIT OPEN
2-4 SOLENOID CONTROL CIRCUIT SHORT TO GROUND
2-4 SOLENOID CONTROL CIRCUIT SHORT TO VOLTAGE
2-4 SOLENOID
TCM - 2-4 SOLENOID
TEST ACTION APPLICABILITY
1NOTE: Low fluid level can be the cause of many Transmission problems. If
the fluid level is low locate and repair the leak then check and adjust the
fluid level per the Service Information.
NOTE: Always perform diagnostics with a fully charged battery to avoid
false symptoms.
With the DRBIIIt, read the engine DTC's. Check and repair all engine DTC's prior
to performing Transmission Symptom Diagnostics.
With the DRBIIIt, read Transmission DTC's. Record all DTC's and 1 Trip Failures.
NOTE: Diagnose 1 Trip Failures as a fully matured DTC.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
Repair as necessary.
Perform the Shift Lever Position Test. If the test does not pass, refer to Symptom test
for P0705 Check Shifter Signal.
For Gear Ratio DTC's, check and record all CVI's.
Most DTC's set on start up but some must be set by driving the vehicle such that all
diagnostic monitors have run.
NOTE: Verify flash level of Transmission Control Module. Some problems
are corrected by software upgrades to the Transmission Control Module.
NOTE: Check for applicable TSB's related to the symptom.
Perform this procedure prior to Symptom diagnosis.All
Continue
Go To 2
66
TRANSMISSION