B1634

B1634 - Left High Beam Control Circuit High






For a complete wiring diagram, refer to.

• When Monitored: Continuously.

• Set Condition: When the totally integrated power module detects a high condition.






Test Step 1 - Intermittent Condition

• Turn the ignition ON.

• With the scan tool, clear all DTCs.

• Turn the high beam lamps ON.

• With the scan tool, read DTCs.

Does the scan tool display B1634 - Left High Beam Control Circuit HIGH?

Yes

• Go to Test Step 2.

No

• The condition that caused this symptom is currently not present. Test 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 the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

Test Step 2 - Test Left Headlamp Return Signal

• Turn the ignition OFF.

• Disconnect the left high beam lamp harness connector.

• With a test lamp connected to 12 volts, probe the left headlamp return signal circuit.

Does the test lamp illuminate brightly on each ground circuit?

Yes

• Go to Test Step 4.

No

• Go to Test Step 3.

Test Step 3 - Left Headlamp Return Signal

• Measure the resistance of the left headlamp return signal circuit at the left high beam harness connector.

Is the resistance less than 10.0 ohms?

Yes

• Replace the inoperative bulb. .

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

No

• Repair the left headlamp return signal circuit for an open.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

Test Step 4 - Test Left High Beam Control Circuit

• Turn the ignition ON.

• With a test lamp connected to ground, test the left high beam control circuit.

Does the test lamp illuminate brightly with the headlamps switch turned ON, and shut OFF with the headlamps turned OFF?

Yes

• Replace the inoperative bulb. .

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

No

• Go to Test Step 5.

Test Step 5 - Left High Beam Control Circuit Open

• Turn the ignition OFF.

• Disconnect the TIPM harness connector.

• Measure the resistance of the left high beam control circuit between the left headlamp harness connector and the TIPM harness connector.

Is the resistance less than 10.0 ohms?

Yes

• Go to Test Step 6.

No

• Repair the left high beam control circuit for an open.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

Test Step 6 - Left High Beam Control Circuit Short To Voltage

• Turn the ignition ON.

• Measure for voltage on the left high beam control circuit.

Is there any voltage Present?

Yes

• Repair the circuit for a short to voltage.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

No

• Replace the totally integrated power module.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior