Dodge Nitro. Manual — part 344

2007 AUTOMATIC TRANSMISSION

NAG1 - Shifter Diagnostics - Nitro

DIAGNOSTIC CODE INDEX

DIAGNOSTIC CODE INDEX

NAG1 - SHIFTER DIAGNOSTICS

DIAGNOSIS AND TESTING

P0562-BATTERY VOLTAGE LOW - ESM

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article.

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.

DTC

Description

P0562

BATTERY VOLTAGE LOW - ESM

P0563

BATTERY VOLTAGE HIGH - ESM

P0607

ECU INTERNAL PERFORMANCE - ESM

P0930

BTSI CONTROL CIRCUIT LOW - ESM

P0931

BTSI CONTROL CIRCUIT HIGH - ESM

P2775

AUTOSTICK UPSHIFT SWITCH CIRCUIT PERFORMANCE - ESM

P2779

AUTOSTICK DOWNSHIFT SWITCH CIRCUIT PERFORMANCE - ESM

U0002

CAN C BUS OFF PERFORMANCE - ESM

U0100

LOST COMMUNICATION WITH ECM/PCM - ESM

U0121

LOST COMMUNICATION WITH ANTI-LOCK BRAKE MODULE - ESM

U0141

LOST COMMUNICATION WITH FRONT CONTROL MODULE - ESM

Possible Causes

VEHICLE CHARGING SYSTEM

2007 Dodge Nitro R/T

2007 AUTOMATIC TRANSMISSION NAG1 - Shifter Diagnostics - Nitro

2007 Dodge Nitro R/T

2007 AUTOMATIC TRANSMISSION NAG1 - Shifter Diagnostics - Nitro

Always perform the NAG1 Pre-Diagnostic Troubleshooting procedure before proceeding.

Diagnostic Test

1) CHECK FOR ENGINE CHARGING SYSTEM DTCS

With the scan tool, read Engine DTCs.

Are there any Engine Charging System DTCs present?

Yes

Refer to appropriate Engine Electrical Diagnostics article and perform the appropriate symptom.

Perform NAG1 TRANSMISSION VERIFICATION TEST.

No

Go to 2).

2) CHECK (F1) IGNITION UNLOCK RUN START CIRCUIT

(F1) IGNITION UNLOCK RUN START CIRCUIT
(Z910) GROUND CIRCUITS
SHIFT LEVER ASSEMBLY

2007 Dodge Nitro R/T

2007 AUTOMATIC TRANSMISSION NAG1 - Shifter Diagnostics - Nitro

Fig. 1: Using 12-Volt Test Light Connected To Ground To Check (F1) Ignition Unlock Run Start
Circuit In Shift Lever Assembly Harness Connector
Courtesy of CHRYSLER LLC

Turn the ignition off to the lock position.

Disconnect the Shift Lever Assembly harness connector.

Turn the ignition on.

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

Does the test light illuminate brightly?

NOTE:

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

2007 Dodge Nitro R/T

2007 AUTOMATIC TRANSMISSION NAG1 - Shifter Diagnostics - Nitro

Yes

Go to 3).

No

Repair the (F1) Ignition Unlock Run Start circuit for high resistance.

Perform NAG1 TRANSMISSION VERIFICATION TEST.

3) CHECK (Z910) GROUND CIRCUITS

Fig. 2: Using 12-Volt Test Light Connected To 12-Volts To Check (Z910) Ground Circuit In Shift
Lever Assembly Harness Connector
Courtesy of CHRYSLER LLC

Turn the ignition off to the lock position.

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

Does the test light illuminate brightly?

Yes

Go to 4).

Perform NAG1 TRANSMISSION VERIFICATION TEST.

No

NOTE:

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

2007 Dodge Nitro R/T

2007 AUTOMATIC TRANSMISSION NAG1 - Shifter Diagnostics - Nitro