Dodge Nitro. Manual — part 859

At all times.

Set Condition:

The TIPM detects a high circuit on the Secondary Door Lock Relay Control circuit even though it is not
attempting to lock the doors for more than 5 seconds.

This test is only for Right Hand Drive (RHD) vehicles.

Diagnostic Test

1) CHECK TROUBLE CODE

Turn the ignition on.

Record all trouble codes.

With the scan tool, erase DTCs.

Turn ignition off and remove the key.

Lock all doors and wait 2 minutes.

Turn the ignition on.

With the scan tool, read DTCs.

Does the scan tool display B1870-ALL DOOR SECONDARY LOCK CONTROL CIRCUIT
HIGH?

Yes

Go to 2).

No

Problem is intermittent and not present at this time. Using the wiring diagram/schematic as a guide,
inspect the wiring and connectors and repair as necessary. Ensure the relay is completely plugged
in.

Perform BODY VERIFICATION TEST - VER 1 .

2) CHECK FOR RELAY SHORTED

Possible Causes

RELAY SHORTED
(P390) SECONDARY DOOR LOCK RELAY CONTROL CIRCUIT SHORT TO VOLTAGE
TOTALLY INTEGRATED POWER MODULE (TIPM)

2007 Dodge Nitro R/T

2007 ACCESSORIES AND EQUIPMENT Power Locks - Electrical Diagnostics - Nitro

Fig. 23: Secondary Door Lock Relay
Courtesy of CHRYSLER LLC

Turn the ignition off.

Remove the Secondary Door Lock Relay from the I.P. End Bracket (behind the right kick panel).

Install a substitute relay in place of the Secondary Door Lock Relay.

Turn the ignition on.

With the scan tool, erase DTCs.

Turn ignition off and remove the key.

Lock all doors and wait 2 minutes.

Turn the ignition on.

With the scan tool, read DTCs.

Does the scan tool display B1870-ALL DOOR SECONDARY LOCK CONTROL CIRCUIT
HIGH?

Yes

Go to 3).

No

2007 Dodge Nitro R/T

2007 ACCESSORIES AND EQUIPMENT Power Locks - Electrical Diagnostics - Nitro

Replace the original relay.

Perform BODY VERIFICATION TEST - VER 1 .

3) CHECK THE (P390) SECONDARY DOOR LOCK RELAY CONTROL CIRCUIT FOR A
SHORT TO VOLTAGE

Fig. 24: Measuring Voltage Between Ground And (P390) Secondary Door Lock Relay Control
Circuit In Relay Connector
Courtesy of CHRYSLER LLC

Turn the ignition off.

Remove the Secondary Door Lock Relay.

Disconnect the TIPM C7 connector.

Turn the ignition on.

Measure the voltage between ground and the (P390) Secondary Door Lock Relay Control circuit in the
relay connector.

2007 Dodge Nitro R/T

2007 ACCESSORIES AND EQUIPMENT Power Locks - Electrical Diagnostics - Nitro

Is there any voltage present?

Yes

Repair the (P390) Secondary Door Lock Relay Control circuit for a short to voltage.

Perform BODY VERIFICATION TEST - VER 1 .

No

Replace the Totally Integrated Power Module in accordance with service information.

Perform BODY VERIFICATION TEST - VER 1 .

B1934-DRIVER DOOR LOCK/UNLOCK SWITCH CIRCUIT STUCK - TIPM

2007 Dodge Nitro R/T

2007 ACCESSORIES AND EQUIPMENT Power Locks - Electrical Diagnostics - Nitro