Dodge Nitro. Manual - part 864

Fig. 37: Secondary Door Unlock Relay Control Circuit Schematic 
Courtesy of CHRYSLER LLC 

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article. 

When Monitored: 

 

2007 Dodge Nitro R/T 

2007 ACCESSORIES AND EQUIPMENT Power Locks - Electrical Diagnostics - Nitro

  

At all times. 

Set Condition: 

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

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 B109B-ALL DOOR SECONDARY UNLOCK 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 . 

Possible Causes 

RELAY SHORTED
(P391) SECONDARY DOOR UNLOCK RELAY CONTROL CIRCUIT SHORT TO VOLTAGE
TOTALLY INTEGRATED POWER MODULE (TIPM)

NOTE:

This test is only for Right Hand Drive vehicles.

 

2007 Dodge Nitro R/T 

2007 ACCESSORIES AND EQUIPMENT Power Locks - Electrical Diagnostics - Nitro

  

2) CHECK FOR RELAY SHORTED 

Fig. 38: Secondary Door Unlock Relay 
Courtesy of CHRYSLER LLC 

Turn the ignition off. 

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

Install a substitute relay in place of the Secondary Door Unlock 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 B198B-ALL DOOR SECONDARY UNLOCK CONTROL CIRCUIT 
HIGH?  

Yes  

Go to 3).  

 

2007 Dodge Nitro R/T 

2007 ACCESSORIES AND EQUIPMENT Power Locks - Electrical Diagnostics - Nitro

  

No  

Replace the original relay.  

Perform BODY VERIFICATION TEST - VER 1 .  

3) CHECK THE (P391) SECONDARY DOOR UNLOCK RELAY CONTROL CIRCUIT FOR A 
SHORT TO VOLTAGE 

Fig. 39: Measuring Voltage Between Ground And (P391) Secondary Door Unlock Relay Control 
Circuit In Relay Connector 
Courtesy of CHRYSLER LLC 

Turn the ignition off. 

Remove the Secondary Door Unlock Relay. 

Disconnect the TIPM C7 connector. 

Turn the ignition on. 

 

2007 Dodge Nitro R/T 

2007 ACCESSORIES AND EQUIPMENT Power Locks - Electrical Diagnostics - Nitro