Pinpoint Test G: No Communication With The Variable Assist Power Steering (VAPS) Module

WARNING: This page is about a different car, the 2006 Mercury Grand Marquis and 2006 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: The Flex Probe Kit must be used for all test connections. Use of standard multimeter probes may damage wiring terminals.

G1 CHECK THE VOLTAGE TO THE VAPS MODULE
- Key in OFF position.
- Disconnect: VAPS Module C2231b.
- Key in ON position.
- Measure the voltage between ground and:
  - VAPS module C2231b-1, circuit 418 (DG/YE), harness side.
  - VAPS module C2231b-7, circuit 418 (DG/YE), harness side.
  - VAPS module C2231b-2, circuit 298 (VT/OG), harness side.
- Are the voltages greater than 10 volts?
Yes : GO to G2.

No : VERIFY BJB fuse 5 (10A) and CJB fuse 8 (10A) are OK. If OK, REPAIR the affected circuit(s) for an open. REPEAT the self-test.
G2 CHECK THE VAPS MODULE GROUND
- Key in OFF position.
- Disconnect: VAPS Module C2231b.
- Measure the resistance between the VAPS module 22231b-12, circuit 676 (PK/OG), harness side and ground.
  
  Fig 1: Measuring Resistance Between VAPS Module 22231B-12, Circuit 676 (PK/OG) And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : CHECK the module communications network. REFER to MODULE COMMUNICATIONS NETWORK .

No : REPAIR circuit 676 (PK/OG) for a short to ground. REPEAT the self-test.