Jeep Grand Cherokee WJ. Manual - part 1074

TEST

ACTION

APPLICABILITY

With the DRBIII

t, check for other transmission DTC’s

If any of these DTC’s are present, perform their respective tests first.
Are DTC’s P1791, P0715, P0720, P1794, P1720, P1721, P1722, or P1724 present
also?

45RFE AUTO

TRANS

Yes

→

Refer to appropriate symptom in the Transmission category. If
any of these codes are present, they will cause a speed ratio error.
Go to test for P1791 first if it is present.
Perform 45RFE TRANSMISSION VERIFICATION TEST - VER
1.

→

Go To

With the DRBIII

t, perform the 2nd Gear Clutch Test. Follow the instructions on the

DRBIII

Increase the throttle angle (TPS Degree) to 30° for no more than a few seconds.
CAUTION: Do not overheat the transmission.
Did the clutch test pass (Input speed remains at zero)?

45RFE AUTO

TRANS

Yes

→

Go To

→

Go To

The conditions to set this code are not currently present.
Check the gearshift linkage adjustment.
Intermittent gear ratio codes can be set by problems in the Input and Output Speed
Sensor circuits and/or Speed Sensor Ground circuit.
Check the speed sensor wiring and connectors for good connection, then perform a
wiggle test using the Transmission Simulator (Miller tool # 8333).
Gear ratio DTC’s can also be set under extreme temperature conditions, this is
usually caused by an internal problem.
Ask the customer if the problem is only experienced under extreme hot or cold
conditions.

45RFE AUTO

TRANS

Yes - Repair the internal transmission

Test Complete.

No - Repair the wiring as necessary

Using the wiring diagram/schematic as a guide, inspect the wiring
and connectors.
Perform 45RFE TRANSMISSION VERIFICATION TEST - VER
1.

With the DRBIII

t, check for other transmission DTC’s

Is a DTC P1728 2C Hydraulic Pressure Switch and/or P1734 2C Pressure Switch
present also?

45RFE AUTO

TRANS

Yes

→

Replace the Transmission or Solenoid/TRS assembly per current
warranty policy.
Perform 45RFE TRANSMISSION VERIFICATION TEST - VER
1.

→

Go To

TRANSMISSION

P0732-GEAR RATIO ERROR IN 2ND —

Continued

TEST

ACTION

APPLICABILITY

Repair or replace the transmission as necessary per current warranty policy.
If the transmission is to be repaired, and there were any line pressure DTC’s present
along with this DTC, make sure to inspect the pump and Pressure Control Solenoid
per service manual procedures.
If DTC’s P1734 and/or P1728 were present in addition to the P0732, replace the
solenoid pack in addition to necessary internal parts.
If there are no possible causes remaining, view repair.

45RFE AUTO

TRANS

Repair

Replace the Transmission or repair internal transmission problem
per current warranty policy.
Perform 45RFE TRANSMISSION VERIFICATION TEST - VER
1.

TRANSMISSION

P0732-GEAR RATIO ERROR IN 2ND —

Continued

Symptom:

P0733-GEAR RATIO ERROR IN 3RD

When Monitored and Set Condition:

P0733-GEAR RATIO ERROR IN 3RD

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

RELATED PRESSURE SWITCH DTC’S PRESENT

INTERMITTENT GEAR RATIO ERRORS

TRANSMISSION INTERNAL PROBLEM

TEST

ACTION

APPLICABILITY

NOTE: 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 DRBIII

t, read the engine DTC’s. Check and repair all engine DTC’s prior

to performing transmission symptom diagnostics.
With the DRBIII

t, 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 controller. Some problems are
corrected by software upgrades to the transmission controller.
NOTE: Check for applicable TSB’s related to the problem.
Perform this procedure prior to Symptom diagnosis.

45RFE AUTO

TRANS

Continue

Go To

TRANSMISSION

TEST

ACTION

APPLICABILITY

With the DRBIII

t, check for other transmission DTC’s

If any of these DTC’s are present, perform their respective tests first.
Are DTC’s P1791, P0715, P0720, P1794, P1720, P1721, P1722, or P1724 present
also?

45RFE AUTO

TRANS

Yes

→

Refer to appropriate symptom in the Transmission category. If
any of these codes are present, they will cause a speed ratio error.
Go to test for P-1791 first if it is present.
Perform 45RFE TRANSMISSION VERIFICATION TEST - VER
1.

→

Go To

With the DRBIII

t, check for other transmission DTC’s

Is a DTC P1787 OD Hydraulic Pressure Switch and/or P1781 OD Pressure Switch
present also?

45RFE AUTO

TRANS

Yes

→

Replace the Transmission or Solenoid/TRS assembly per current
warranty policy.
Perform 45RFE TRANSMISSION VERIFICATION TEST - VER
1.

→

Go To

With the DRBIII

t, perform the 3rd Gear Clutch Test. Follow the instructions on the

DRBIII

Increase the throttle angle (TPS Degree) to 30° for no more than a few seconds.
CAUTION: Do not overheat the transmission.
Did the clutch test pass (Input speed remains at zero)?

45RFE AUTO

TRANS

Yes

→

Go To

→

Go To

45RFE AUTO

TRANS

Yes - Repair internal transmission

Test Complete.

No - Repair wiring as necessary.

Using the wiring diagram/schematic as a guide, inspect the wiring
and connectors.
Perform 45RFE TRANSMISSION VERIFICATION TEST - VER
1.

TRANSMISSION

P0733-GEAR RATIO ERROR IN 3RD —

Continued

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