B2113-5 VOLT SUPPLY CIRCUIT HIGH (FCM)
For a complete wiring diagram Refer to Section 8W.
- When Monitored:
With the ignition on.
- Set Condition:
The Front Control Module detects the (F891) 5 volt supply circuit voltage above 5.0 volts.
| Possible Causes |
| (F891) 5 VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE |
| A/C PRESSURE TRANSDUCER |
| FRONT CONTROL MODULE |
Diagnostic Test
1. CHECK FOR ACTIVE DTCWith the scan tool, read the active DTC's.
Cycle the ignition switch from off to on, leaving the ignition on for a minimum of 90 seconds.
With the scan tool, read the active DTC's.
Does the scan tool display this DTC as active?
Yes
- Go To 2
No
- If the DTC is stored, check for an intermittent condition. Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.
2. A/C PRESSURE TRANSDUCER
Turn the ignition off.
Disconnect the A/C Pressure Transducer harness connector.
Cycle the ignition switch from off to on, leaving the ignition on for a minimum of 90 seconds.
With the scan tool, read the active DTC's.
Does the scan tool display this DTC as active?
Yes
- Go To 3
No
- Replace the A/C Pressure Transducer in accordance with the service information.
- Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
3. (F891) 5 VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE
Turn the ignition off.
Disconnect the FCM C1 harness connector.
Turn the ignition on.
Measure the voltage of the (F891) 5 Volt Supply circuit.
Is the voltage above 5.5 volts?
Yes
- Repair the (F891) 5 Volt Supply circuit for a short to voltage.
- Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No
- Inspect the wiring and connectors for damage or shorted circuits. If ok, replace and program the Front Control Module in accordance with the service information.
- Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).