Dodge Caliber. Manual - part 1242

U1401-IMPLAUSIBLE ENGINE SPEED SIGNAL RECEIVED

For a complete wiring diagram Refer to Section 8W.

Theory of Operation

The Transmission Control Module (TCM) receives Engine rpm over the CAN Bus.

•

When Monitored:
Ignition on with a system voltage between 9.0 and 16.0 volts.
Time since last TRS change greater than 2.0 seconds.
Condition one:
TCC ON/OFF in the ON position.
No Active DTCs from the following:

•

Lost Communication with ECM/PCM

•

Step Motor

•

No CAN Bus DTCs present.

•

Transmission Range Sensor

•

TCC ON/OFF Solenoid

•

Input or Output Speed Sensor
Condition two:
No Active DTCs from the following:

•

Lost Communication with ECM/PCM

•

No CAN Bus DTCs present.

•

Step Motor

•

Condition one:
All the below conditions must be present for the period of 5 seconds for the DTC to set:

•

Engine speed minus Input speed is greater than 1000 rpm for the period of 5 seconds.

•

Engine speed minus Secondary speed estimated ratio is greater than 1000 rpm for the period of 5 seconds.

•

Secondary speed multiplied by the estimated ratio minus the primary speed is less than 1000 rpm.
Condition two:

•

Engine speed is less than 450 rpm and the Input speed is greater than or equal to 1000 rpm for the period of
20 msec.

Possible Causes

FCM/TIPM CAN BUS DTCS PRESENT

ENGINE MODULE DTCS PRESENT

TRANSMISSION CONTROL MODULE

Always perform the CVT Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 -
TRANSMISSION/TRANSAXLE/AUTOMATIC - CVT - STANDARD PROCEDURE)

Diagnostic Test

CHECK IF THE DTC IS ACTIVE

With the scan tool, read Transmission DTCs.

Is the status Active for this DTC or is the STARTS SINCE SET counter 2 or less?

Yes

>> Go To 2

>> Go To 4

AUTOMATIC - CVT-ELECTRICAL DIAGNOSTICS

21 - 267

CHECK FOR FCM/TIPM CAN BUS DTCS

With the scan tool, read FCM DTCs.

Are there any FCM/TIPM CAN BUS DTCs present?

Yes

>> (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) cate-

gory and perform the appropriate symptom(s).

Perform CVT VERIFICATION TEST. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - CVT -
STANDARD PROCEDURE)

>> Go To 3

CHECK IF ENGINE DTCS ARE PRESENT

With the scan tool, read engine DTCs.

Are there any engine DTCs present?

Yes

>> (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) category and perform the appropriate symptom(s).

Perform CVT VERIFICATION TEST. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - CVT -
STANDARD PROCEDURE)

>> Using the schematics as a guide, check the Transmission Control Module (TCM) pins, terminals, and

connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground
circuits. If no problems are found, replace the TCM per the Service Information. (Refer to 8 - ELEC-
TRICAL/ELECTRONIC CONTROL MODULES/TRANSMISSION CONTROL MODULE - REMOVAL)

Perform CVT VERIFICATION TEST. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - CVT -
STANDARD PROCEDURE)

INTERMITTENT WIRING AND CONNECTORS

The conditions necessary to set this DTC are not present at this time.

Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.

Wiggle the wires while checking for shorted and open circuits.

Were there any problems found?

Yes

>> Repair as necessary.

Perform CVT VERIFICATION TEST. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - CVT -
STANDARD PROCEDURE)

>> Test Complete.

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AUTOMATIC - CVT-ELECTRICAL DIAGNOSTICS

U1407-IMPLAUSIBLE ENGINE TORQUE REQUEST SIGNAL RECEIVED

For a complete wiring diagram Refer to Section 8W.

•

When Monitored:
Ignition on with a system voltage between 9.0 and 16.0 volts with no CAN DTCs detected.

•

Set Condition:
When the TCM receives an implausible engine torque request from the PCM over the CAN Bus.

Possible Causes

FCM/TIPM CAN BUS DTCS PRESENT

ENGINE DTCS PRESENT

POWERTRAIN CONTROL MODULE

TRANSMISSION CONTROL MODULE

Always perform the CVT Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 -
TRANSMISSION/TRANSAXLE/AUTOMATIC - CVT - STANDARD PROCEDURE)

Diagnostic Test

CHECK IF THE DTC IS ACTIVE

With the scan tool, read Transmission DTCs.

Is the status Active for this DTC?

Yes

>> Go To 2

>> Go To 5

CHECK FOR FCM/TIPM CAN BUS DTCS

With the scan tool, read FCM/TIPM DTCs.

Are there any FCM/TIPM CAN BUS DTCs present?

Yes

>> (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) cate-

gory and perform the appropriate symptom(s).

Perform CVT VERIFICATION TEST. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - CVT -
STANDARD PROCEDURE)

>> Go To 3

CHECK IF ENGINE DTCS ARE PRESENT

With the scan tool, read engine DTCs.

Are there any engine DTCs present?

Yes

>> (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) category and perform the appropriate symptom(s).

Perform CVT VERIFICATION TEST. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - CVT -
STANDARD PROCEDURE)

>> Go To 4

AUTOMATIC - CVT-ELECTRICAL DIAGNOSTICS

21 - 269

CHECK THE PCM

Replace and program the PCM per the Service Information. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/POWERTRAIN CONTROL MODULE - REMOVAL)

Perform CVT VERIFICATION TEST. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - CVT - STANDARD
PROCEDURE)

Does the DTC reset?

Yes

>> Using the schematics as a guide, check the Transmission Control Module (TCM) pins, terminals, and

Perform CVT VERIFICATION TEST. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - CVT -
STANDARD PROCEDURE)

>> Test Complete.

INTERMITTENT WIRING AND CONNECTORS

The conditions necessary to set this DTC are not present at this time.

Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.

Wiggle the wires while checking for shorted and open circuits.

Were there any problems found?

Yes

>> Repair as necessary.

Perform CVT VERIFICATION TEST. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - CVT -
STANDARD PROCEDURE)

>> Test Complete.

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AUTOMATIC - CVT-ELECTRICAL DIAGNOSTICS

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