HVAC

B210B-SYSTEM VOLTAGE HIGH

For a complete wiring diagram Consult Diagrams/Electrical.

- When Monitored:
With the ignition switch on.

- Set Condition:
The A/C Heater Control has detected the system voltage is high.





Diagnostic Test

1. ACTIVE DTC(S) PRESENT
Turn the ignition on.
With the scan tool, check for DTCs.
Does the scan tool display this DTC as active?

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 the BODY VERIFICATION TEST - VER 1. Body Verification Test.

2. CHECK (F943) FUSED RUN-START RELAY OUTPUT CIRCUIT FOR A SHORT TO BATTERY VOLTAGE




Turn the ignition off.
Disconnect the A/C Heater Control C1 harness connector.
Using a volt meter measure the voltage on the (F943) Fused Run-Start Relay Output circuit in the A/C Heater Control C1 harness connector.
Is there any voltage present?

Yes

- Repair the (F943) Fused Run-Start Relay Output circuit for a short to voltage.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test.

No

- Replace the A/C Heater Control.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test.