Pinpoint Test K: Keep Alive Power
WARNING: This page is about a different car, the 2010 Ford Pickup, 2010 Ford F550 Super Duty, 2010 Ford F450 Super Duty, and 2010 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Refer to the Transmission Vehicle Harness Connector illustration within the TRANSMISSION CONNECTOR LAYOUTS procedure.
NOTE:
Read and record all DTCs.
NOTE:
Use the PID Chart for available diagnostic PIDs. Refer to DIAGNOSTIC PARAMETERS IDENTIFICATION (PID) CHART .
- K1 CHECK FOR DTCs
- Connect the scan tool.
- Ignition ON.
- Check for DTC P1633.
- Is DTC P1633 set?
- Yes: GO to K2 .
- No: REFER to CHARGING SYSTEM .
- K2 CHECK BATTERY VOLTAGE
- Measure the voltage across the battery terminals. Record the measurement.
- Is the voltage greater than 10.5 volts?
- Yes: GO to K3 .
- No: REFER to CHARGING SYSTEM .
- K3 CHECK CHARGING SYSTEM
- Start the engine.
- Bring the engine up to normal operating temperature and allow the engine to idle.
- Is the generator/check engine lamp off?
- Yes: GO to K4 .
- No: REFER to CHARGING SYSTEM .
- K4 CHECK CHARGING SYSTEM
- Ignition ON.
- With the engine running, increase the engine speed to 2,000 RPM and observe the scan tool VPWR TCM PID.
- Is the system voltage between 13 volts and 15 volts?
- Yes: GO to K5 .
- No: REFER to CHARGING SYSTEM .
- K5 CHECK CIRCUIT SBB37 (GY/RD) FOR BATTERY VOLTAGE
- Ignition OFF.
- Disconnect: Transmission Control Module (TCM) C1750.
- Measure the voltage between TCM C1750-60, circuit SBB37 (GY/RD), harness side and ground.
- Is the voltage greater than 10.5 volts?
- Yes: REPLACE the TCM . RECONNECT all components. CLEAR the DTC. TEST the system for normal operation.
- No: REMOVE and INSPECT fuse 37 (10A). If fuse is blown, REPAIR circuit SBB37 (GY/RD) for a short to ground. If fuse is good, REPAIR circuit SBB37 (GY/RD) for an open. CLEAR the DTC. TEST the system for normal operation.