MODULE, Electronic Shift (ESM) - 2014 Jeep Wrangler JK Factory Service Manual

P0562-BATTERY/SYSTEM VOLTAGE LOW

For a complete wiring diagram, refer to the Wiring Information.

Theory of Operation

The Shift Lever Assembly (SLA) controller (Electronic Shift Module - ESM) monitors ignition voltage. The DTC will set if the monitored battery voltage drops below 6.0 volts and a temporary limp in will be activated. If the voltage rises above 9.0 volts, normal operations is resumed.

When Monitored:
Continuously with the ignition in the run position.
Set Condition:
When monitored battery voltage drops below 6.0 volts.

Possible Causes
VEHICLE CHARGING SYSTEM
(F1) IGNITION UNLOCK RUN START CIRCUIT
(Z910) GROUND CIRCUITS
SHIFT LEVER ASSEMBLY

Always perform the NAG1 Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 28 - DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure).

1. CHECK FOR ENGINE CHARGING SYSTEM DTCS

1.	With the scan tool, read Engine DTCs.

Are there any Engine Charging System DTCs present?

Yes

(Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Diagnosis and Testing) and perform the appropriate diagnostic procedure.
Perform the NAG1 TRANSMISSION VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure).

No

Go To 2

2. CHECK (F1) IGNITION UNLOCK RUN START CIRCUIT

1.	Turn the ignition off to the lock position.

2.	Disconnect the Shift Lever Assembly harness connector.

3.	Turn the ignition on.

4.	Using a 12-volt test light connected to ground, check the (F1) Ignition Unlock Run Start circuit in the Shift Lever Assembly harness connector.

NOTE: The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.

Does the test light illuminate brightly?

Yes

Go To 3

No

Repair the (F1) Ignition Unlock Run Start circuit for high resistance.
Perform the NAG1 TRANSMISSION VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure).

3. CHECK (Z910) GROUND CIRCUITS

1.	Turn the ignition off to the lock position.

2.	Using a 12-volt test light connected to 12-volts, check the (Z910) Ground circuit in the Shift Lever Assembly harness connector.

NOTE: The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.

Does the test light illuminate brightly?

Yes

Go To 4

No

Repair the (Z910) Ground circuit for high resistance.
Perform the NAG1 TRANSMISSION VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure).

4. SHIFT LEVER ASSEMBLY

1.	Reconnect all disconnected harness connectors.

2.	With the scan tool, erase Shift Lever DTCs.

3.	Start the engine and raise the engine speed to 2000 rpm.

4.	With the scan tool, read Shift Lever DTCs.

Did the DTC P0562-BATTERY VOLTAGE LOW DTC reset?

Yes

Replace the Shift Lever Assembly in accordance with the Service Information
Perform the NAG1 TRANSMISSION VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure).

No

Test Complete.

P0563-BATTERY/SYSTEM VOLTAGE HIGH

For a complete wiring diagram, refer to the Wiring Information.

Theory of Operation

The Shift Lever Assembly monitors ignition voltage. The DTC will set, if the monitored battery voltage rises above 16.0 volts.

When Monitored:
Continuously with the ignition in the run position.
Set Condition:
When the monitored battery voltage rises above 16.0 volts.

Possible Causes
CHARGING SYSTEM DTCS
VEHICLE WAS JUMP STARTED INCORRECTLY
SYSTEM VOLTAGE HIGH
SHIFT LEVER ASSEMBLY

Always perform the NAG1 Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 28 - DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure).

1. CHECK FOR CHARGING SYSTEM DTCS

1.	With the scan tool, read Engine DTCs.

NOTE: This includes any one trip faults.

Are there any Engine Charging System DTCs present?

Yes

(Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Diagnosis and Testing) and perform the appropriate diagnostic procedure.

No

Go To 2

2. VEHICLE WAS JUMP STARTED INCORRECTLY

1.	Verify if the vehicle was jump started by another vehicle using a 24-volt charging system or incorrectly jump started with the 12 volt battery in series.

Was the vehicle jump started by another vehicle?

Yes

This is the cause of the DTC. Erase the DTC and return the vehicle to the customer.
Perform the NAG1 TRANSMISSION VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure).

No

Go To 3

3. CHECK SYSTEM VOlTAGE

1.	Start the engine and let idle for at least 10 seconds.

2.	With the scan tool, monitor system voltage.

Is the system voltage above 16V for more than 5 seconds?

Yes

(Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Diagnosis and Testing) and perform the appropriate diagnostic procedure.
Perform the NAG1 TRANSMISSION VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure).

No

Go To 4

4. SHIFT LEVER ASSEMBLY

1.	Reconnect all disconnected harness connectors.

2.	With the scan tool, erase Shift Lever DTCs.

3.	Start the engine and raise the engine speed to 2000 RPM.

4.	With the scan tool, read Shift Lever DTCs.

Did the P0563-BATTERY VOLTAGE HIGH DTC reset?

Yes

Replace the Shift Lever Assembly in accordance with the Service Information
Perform the NAG1 TRANSMISSION VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure).

No

Test Complete.

P0607-ECU INTERNAL PERFORMANCE

For a complete wiring diagram, refer to the Wiring Information.

Theory of Operation

The Shift Lever Assembly (SLA) Electronic Shift Module (ESM) performs various internal tests to verify proper controller operation. This DTC indicates that there is an issue with the Shifter's internal processor.

When Monitored:
Continuously with the ignition in the run position.
Set Condition:
If the Shift Lever Assembly controller detects an invalid calibration (checksum value).

Possible Causes
SHIFTER LEVER ASSEMBLY

Always perform the NAG1 Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 28 - DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure).

SHIFTER LEVER ASSEMBLY

Repair

Using the schematics as a guide, check the Shift Lever Assembly Control Module terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the Shift Lever Assembly in accordance with the Service Information.
Perform the NAG1 TRANSMISSION VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure).

P0930-BTSI CONTROL CIRCUIT LOW

For a complete wiring diagram, refer to the Wiring Information.

Theory of Operation

The brake switch signal must be active before the shift lever can be moved out of the park position. The Shift Lever Assembly (SLA) Electronic Shift Module (ESM) receives two brake switch signals. The first signal is a CAN C Bus message sent to the shift lever assembly. The second signal is a hard wired brake switch signal to the shift lever assembly. The CAN C Bus message is the primary brake switch signal and the hard wired signal serves as the backup brake switch signal.

When Monitored:
Continuously with the ignition in the run position.
Set Condition:
The DTC will set if the high side driver detects a short to ground for 10 seconds.

Possible Causes
ENGINE BRAKE DTCS PRESENT
ABS DTCS PRESENT
(L51) BRAKE SWITCH SIGNAL SHORT TO GROUND
SHIFT LEVER ASSEMBLY

Always perform the NAG1 Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 28 - DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure).

1. ENGINE DTCS PRESENT

1.	With the scan tool, read Engine DTCs.

Are there any Engine brake DTCs present?

Yes

(Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Diagnosis and Testing) and perform the appropriate diagnostic procedure.
Perform the NAG1 TRANSMISSION VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure).

No

Go To 2

2. ABS MODULE DTCS PRESENT

1.	With the scan tool, read ABS Module DTCs.

Are there any ABS DTCs present?

Yes

(Refer to 28 - DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Diagnosis and Testing) and perform the appropriate diagnostic procedure.

No

Go To 3

3. (L51) BRAKE SWITCH SIGNAL SHORTED TO GROUND

1.	Turn the ignition off to the lock position.

2.	Disconnect the Shift Lever Assembly harness connector.

NOTE: Check connectors - Clean/repair as necessary.

3.	Measure the resistance between ground and the (L51) Brake Switch Signal circuit.

Is the resistance below 5.0 Ohms?

Yes

Repair the (L51) Brake Switch Signal for a short to ground.
Perform the NAG1 TRANSMISSION VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure).

No

Using the schematics as a guide, inspect the wiring and connectors. Repair as necessary. Pay particular attention to all power and ground circuits. If no problems are found, replace the Shift Lever Assembly in accordance with the Service Information.
Perform the NAG1 TRANSMISSION VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure).

P0931-BTSI CONTROL CIRCUIT HIGH

For a complete wiring diagram, refer to the Wiring Information.

Theory of Operation

The brake switch signal must be active before the shift lever can be moved out of the park position. The Shift Lever Assembly (SLA) Electronic Shift Module (ESM) receives two brake switch signals. The first signal is a CAN C Bus message sent to the shifter lever assembly. The second signal is a hard wired brake switch signal to the shifter lever assembly. The CAN C Bus message is the primary brake switch signal and the hard wired signal serves as the backup brake switch signal. These two brake switch signals are compared against each other to verify proper brake switch operation.

When Monitored:
Continuously with the ignition in the run position.
Set Condition:
The DTC will set if the high side driver detects an open load for 10 seconds.

Possible Causes
ENGINE BRAKE DTCS PRESENT
ABS DTCS PRESENT
(L51) BRAKE SWITCH SIGNAL OPEN
(L51) BRAKE SWITCH SIGNAL SHORTED TO VOLTAGE
SHIFT LEVER ASSEMBLY

Always perform the NAG1 Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 28 - DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure).

1. PCM DTCs PRESENT

1.	With the scan tool, read PCM DTCs.

Are there any PCM brake DTCs present?

Yes

(Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Diagnosis and Testing) and perform the appropriate diagnostic procedure.

No

Go To 2

2. ABS MODULE DTCs PRESENT

1.	With the scan tool, read ABS Module DTCs.

Are there any ABS DTCs present?

Yes

(Refer to 28 - DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Diagnosis and Testing) and perform the appropriate diagnostic procedure.

No

Go To 3

3. (L51) BRAKE SWITCH SIGNAL OPEN

1.	Turn the ignition off to the lock position.

2.	Disconnect the Shift Lever Assembly harness connector.

3.	Disconnect the Stop Lamp Switch harness connector.

NOTE: Check connectors - Clean/repair as necessary.

4.	Measure the resistance of the (L51) Brake Switch Signal circuit between the Shift Lever Assembly harness connector and the Stop Lamp Switch.

Is the resistance above 5.0 Ohms?

Yes

Repair the (L51) Brake Switch Signal for an open.
Perform the NAG1 TRANSMISSION VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure).

No

Go To 4

4. (L51) BRAKE SWITCH SIGNAL SHORTED TO VOLTAGE

1.	Turn the ignition off to the lock position.

2.	Disconnect the Shift Lever Assembly harness connector.

NOTE: Check connectors - Clean/repair as necessary.

3.	Turn the ignition on.

4.	Measure the voltage of the (L51) Brake Switch Signal circuit.

Is the voltage above 0.5 of a volt?

Yes

Repair the (L51) Brake Switch Signal for a short to voltage.
Perform the NAG1 TRANSMISSION VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure).

No

Replace the Shift Lever Assembly in accordance with the Service Information.
Perform the NAG1 TRANSMISSION VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure).

P2775-AUTOSTICK UPSHIFT SWITCH CIRCUIT PERFORMANCE

For a complete wiring diagram, refer to the Wiring Information.

Theory of Operation

The AutoStick Switch is integrated into the Shift Lever Assembly. The gear requested by the AutoStick selection is then sent over the CAN C bus to the TCM to engage the requested gear.

When Monitored:
Continuously with the ignition in the run position.
Set Condition:
When the expected switch state is not correctly sensed by the Shift Lever Assembly. If the upshift switch signal is detected as active in gear position other than drive.

Possible Causes
SHIFT LEVER ASSEMBLY

Always perform the NAG1 Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 28 - DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure).

SHIFT LEVER ASSEMBLY

Repair

Using the schematics as a guide, check the Shift Lever Assembly (SLA) Electronic Shift Module (ESM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the Shift Lever Assembly in accordance with the Service Information.
Perform the NAG1 TRANSMISSION VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure).

P2779-AUTOSTICK DOWNSHIFT SWITCH CIRCUIT PERFORMANCE

For a complete wiring diagram, refer to the Wiring Information.

Theory of Operation

The AutoStick Switch is integrated into the Shift Lever Assembly. The gear requested by the AutoStick selection is then sent over the CAN C bus from the Electronic Shift Module (ESM) to the TCM to engage the requested gear.

When Monitored:
Continuously with the ignition in the run position and with the shift lever in AutoStick mode.
Set Condition:
When the expected switch state is not correctly sensed by the Shift Lever Assembly (SLA) Electronic Shift Module (ESM). If the upshift switch signal is detected as active in gear position other than drive or both upshift and downshift signals are active at the same time.

Possible Causes
SHIFT LEVER ASSEMBLY

Always perform the NAG1 Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 28 - DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure).

SHIFT LEVER ASSEMBLY

Repair

Using the schematics as a guide, check the Shift Lever Assembly (SLA) Electronic Shift Module (ESM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the Shift Lever Assembly in accordance with the Service Information.
Perform the NAG1 TRANSMISSION VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure).

U0002-CAN C BUS OFF PERFORMANCE

For a complete wiring diagram, refer to the Wiring Information.

Theory of Operation

When Monitored:
Ignition run time is greater than one second.

Battery voltage between 9 and 16 volts.

Engine run time greater than three seconds.
Set Condition:
Bus messages not received from the Totally Integrated Power Module (TIPM) for approximately two to five seconds.

Possible Causes
CAN BUS CIRCUITS OPEN OR SHORTED
DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
TOTALLY INTEGRATED POWER MODULE POWER AND GROUND
TIPM NOT CONFIGURED CORRECTLY
TOTALLY INTEGRATED POWER MODULE (TIPM)
MODULE THAT SET THIS DTC

ACTIVE DTC

1.	Ignition on, engine not running.

2.	With the scan tool, select view DTCs.

Is the DTC Active at this time?

Yes

Diagnose the U0002-CAN C BUS OFF PERFORMANCE as the U0001-CAN C BUS CIRCUIT test. Perform the U0001-CAN C Bus diagnostic procedure.

No

(Refer to 29 - Non-DTC Diagnostics/Communication - Diagnosis and Testing) and perform the Stored Lost Communication DTCs diagnostic procedure.

U0100-LOST COMMUNICATION WITH THE ECM/PCM

For a complete wiring diagram, refer to the Wiring Information.

Possible Causes-U0100

When Monitored:
Ignition run time is greater than one second.

Battery voltage between 9 and 16 volts.

Engine run time greater than three seconds.
Set Condition:
Bus messages not received from the Powertrain Control Module (ECM/PCM) for approximately two to five seconds.

Possible Causes
CAN BUS CIRCUITS OPEN OR SHORTED
DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
POWERTRAIN CONTROL MODULE POWER AND GROUND
TIPM NOT CONFIGURED CORRECTLY
POWERTRAIN CONTROL MODULE (ECM/PCM)
MODULE THAT SET THIS DTC

ACTIVE DTC

1.	Ignition on, engine not running.

2.	With the scan tool, select view DTCs.

Is the DTC Active at this time?

Yes

Perform the U0100-Lost Communication with ECM/PCM diagnostic procedure.

No

(Refer to 29 - Non-DTC Diagnostics/Communication - Diagnosis and Testing) and perform the Stored Lost Communication DTCs diagnostic procedure.

U0121-LOST COMMUNICATION WITH ABS

For a complete wiring diagram, refer to the Wiring Information.

Possible Causes

When Monitored:
Ignition run time is greater than one second.

Battery voltage between 9 and 16 volts.

Engine run time greater than three seconds.
Set Condition:
Bus messages not received from the Totally Integrated Power Module (TIPM) for approximately two to five seconds.

Possible Causes
CAN BUS CIRCUITS OPEN OR SHORTED
ABS MODULE
DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
TOTALLY INTEGRATED POWER MODULE POWER AND GROUND
TIPM NOT CONFIGURED CORRECTLY
TOTALLY INTEGRATED POWER MODULE (TIPM)
MODULE THAT SET THIS DTC

ACTIVE DTC

1.	Ignition on, engine not running.

2.	With the scan tool, select view DTCs.

Is the DTC Active at this time?

Yes

(Refer to 28–DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM)-Diagnosis and Testing), and perform the U0121-Lost Communication with Anti-Lock Brake Module diagnostic procedure.

No

(Refer to 29 - Non-DTC Diagnostics/Communication - Diagnosis and Testing) and perform the Stored Lost Communication DTCs diagnostic procedure.

U0141-LOST COMMUNICATION WITH IPM (FCM/TIPM)

For a complete wiring diagram, refer to the Wiring Information.

When Monitored:
Continuously when the ignition is on.

The battery voltage between 10.0 and 16.0 Volts.

Ignition Off Draw (IOD) fuse installed.

Totally Integrated Power Module (TIPM) is configured correctly.
Set Condition:
Bus messages not received from the Totally Integrated Power Module (TIPM) for approximately two to five seconds.

Possible Causes
CAN BUS CIRCUITS OPEN OR SHORTED
DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
TOTALLY INTEGRATED POWER MODULE POWER AND GROUND
TIPM NOT CONFIGURED CORRECTLY
TOTALLY INTEGRATED POWER MODULE (TIPM)
MODULE THAT SET THIS DTC

VERIFY DTC IS ACTIVE

NOTE: Make sure the IOD fuse is installed and the battery is fully charged before proceeding.

1.	Turn the ignition on.

2.	With the scan tool, read active DTCs.

Is this DTC active?

Yes

(Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Diagnosis and Testing) and perform the U0141-Lost Communication with IPM (FCM/TIPM) diagnostic procedure.

No

(Refer to 29 - Non-DTC Diagnostics/Communication - Diagnosis and Testing) and perform the Stored Lost Communication DTCs diagnostic procedure.