Dodge Nitro. Manual — part 620

Perform BODY VERIFICATION TEST - VER 1 .

B1634-LEFT HI BEAM CONTROL CIRCUIT HIGH

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article.

When Monitored:

Continuously.

Set Condition:

When the Totally Integrated Power Module (TIPM) detects a HIGH condition.

Diagnostic Test

1) INTERMITTENT CONDITION

Turn the ignition on.

With the scan tool, clear all DTC's.

Turn the High Beam Lamps on.

With the scan tool, read DTC's.

Does the scan tool display active: B1634-LEFT HIGH BEAM CONTROL CIRCUIT HIGH?

Yes

Go to 2).

No

The condition that caused this symptom is currently not present. Check for an intermittent
condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken
wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or

Possible Causes

CHECK (L911) LEFT HEADLAMP RETURN SIGNAL
(L911) LEFT HEADLAMP RETURN SIGNAL OPEN
CHECK (L33) LEFT HIGH BEAM CONTROL CIRCUIT
(L33) LEFT HIGH BEAM CONTROL CIRCUIT OPEN
(L33) LEFT HIGH BEAM CONTROL CIRCUIT SHORT TO VOLTAGE
LEFT HIGH BEAM BULB
TOTALLY INTEGRATED POWER MODULE

2007 Dodge Nitro R/T

2007 ACCESSORIES AND EQUIPMENT Lamps/Lighting - Exterior - Electrical/Diagnostics - Nitro

contaminated terminals. Repair as necessary.

Perform BODY VERIFICATION TEST - VER 1 .

2) CHECK (L911) LEFT HEADLAMP RETURN SIGNAL

Turn the ignition off.

Disconnect the Left High Beam Lamp harness connector.

With a 12-volt test light connected to 12-volts, probe the (L911) left headlamp return signal circuit.

Does the test light illuminate brightly on each ground circuit?

Yes

Go to 4).

No

Go to 3).

3) (L911) LEFT HEADLAMP RETURN SIGNAL

Measure the resistance of the (L911) left headlamp return signal circuit at the Left High Beam harness
connector.

Is the resistance below 10.0 ohms?

Yes

Replace the Inoperative bulb in accordance with the Service Information.

Perform BODY VERIFICATION TEST - VER 1 .

No

Repair the (L911) left headlamp return signal circuit for an open.

Perform BODY VERIFICATION TEST - VER 1 .

4) CHECK (L33) LEFT HIGH BEAM CONTROL CIRCUIT

Turn the ignition on.

With a 12-volt test light connected to ground, check the (L33) Left High Beam Control circuit.

Does the test light illuminate brightly with the headlamps switch turned on, and shut off with the
headlamps turned off?

Yes

2007 Dodge Nitro R/T

2007 ACCESSORIES AND EQUIPMENT Lamps/Lighting - Exterior - Electrical/Diagnostics - Nitro

Replace the Inoperative bulb in accordance with the Service Information.

Perform BODY VERIFICATION TEST - VER 1 .

No

Go to 5).

5) (L33) LEFT HIGH BEAM CONTROL CIRCUIT OPEN

Turn the ignition off.

Disconnect the TIPM C3 harness connector.

Measure the resistance of the (L33) Left High Beam Control Circuit between the Left Headlamp harness
connector and the TIPM C3 harness connector.

Is the resistance below 10.0 ohms?

Yes

Go to 6).

No

Repair the (L33) Left High Beam Control circuit for an open.

Perform BODY VERIFICATION TEST - VER 1 .

6) (L33) LEFT HIGH BEAM CONTROL CIRCUIT SHORT TO VOLTAGE

Turn the ignition on.

Measure for voltage on the (L33) Left High Beam Control circuit.

Is there any voltage present?

Yes

Repair the (L33) Left High Beam Control circuit for a short to voltage.

Perform BODY VERIFICATION TEST - VER 1 .

No

Replace the Totally Integrated Power Module (TIPM) in accordance with the Service Information.

Perform BODY VERIFICATION TEST - VER 1 .

B1637-RIGHT HI BEAM CONTROL CIRCUIT LOW

2007 Dodge Nitro R/T

2007 ACCESSORIES AND EQUIPMENT Lamps/Lighting - Exterior - Electrical/Diagnostics - Nitro

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article.

When Monitored:

With the High Beam Headlamps activated.

Set Condition:

When the Totally Integrated Power Module (TIPM) detects a LOW condition.

Diagnostic Test

1) INTERMITTENT CONDITION

Turn the ignition on.

With the scan tool, clear all DTC's.

Turn the High Beam Lamps on.

With the scan tool, read DTC's.

Does the scan tool display active: B1637-RIGHT HIGH BEAM CONTROL CIRCUIT LOW?

Yes

Go to 2).

No

The condition that caused this symptom is currently not present. Check for an intermittent
condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken
wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or
contaminated terminals. Repair as necessary.

Perform BODY VERIFICATION TEST - VER 1 .

2) RIGHT HIGH BEAM BULB

Turn the ignition off.

Disconnect the Right High Beam Bulb.

Possible Causes

(L34) RIGHT HIGH BEAM CONTROL CIRCUIT SHORT TO GROUND
RIGHT HIGH BEAM BULB
TOTALLY INTEGRATED POWER MODULE

2007 Dodge Nitro R/T

2007 ACCESSORIES AND EQUIPMENT Lamps/Lighting - Exterior - Electrical/Diagnostics - Nitro