9000 - 9999: 9036

9036-VOLTAGE UNSTABLE





For a complete wiring diagram, Refer to the Wiring Information Electrical Diagrams.

- When Monitored:
With the ignition on.

- Set Condition:
When Fused B(+) circuit voltage to Switch Bank Module (SBM) is less than 10.5 Volts or greater than 15 Volts for more than 15 seconds.





1. CHECK FOR ENGINE CONTROL MODULE (ECM) DTCS

NOTE: Make sure the vehicle battery is in good condition. Using the Midtronics Battery Tester, test the vehicle battery before continuing.

NOTE: Inspect the vehicle for after market accessories that may exceed the generator system output.

NOTE: Make sure the generator drive belt is in good operating condition.

NOTE: Inspect related fuses. If an open fuse is found, use the wire diagram/schematic as a guide and inspect the wiring and connectors for damage.

1. Turn the ignition on.
2. With the scan tool, read active ECM DTCs.

Does the scan tool display any active ECM DTCs?

Yes

- Testing and Inspection for the diagnostic test procedure.

No

- Go To 2

2. OPEN FUSED B(+) TO MODULE
1. Turn the ignition off.
2. Disconnect the Switch Bank Module C1 connector.

NOTE: Check connectors. Clean and repair as necessary.

3. Turn the ignition on.
4. Using a 12-Volt test light connected to ground, check the Fused B(+) circuit at the C1 connector.

Does the test light illuminate brightly?

No

- Repair the Fused B(+) circuit for an open or high resistance.
- Perform BODY VERIFICATION TEST. Verification Tests.

Yes

- Replace the Switch Bank Module (SBM).
- Perform BODY VERIFICATION TEST. Verification Tests.