Test A: No Communication With Pats Module (Mustang)
- Check Fuses
- Turn ignition off. Using an ohmmeter, check condition of instrument panel fuses No. 16 (20-amp) and No. 18 (20-amp). If fuses are okay, go to step 3). If fuses are not okay, go to next step.
- Check Circuits For Short To Ground
- Disconnect PATS module connector C217 (located behind lower left side of instrument panel). Using an ohmmeter, check resistance between ground and PATS module connector C217 terminal No. 15 (Dark Blue/Orange wire). See Fig 1
. Check resistance between ground and PATS module connector C217 terminal No. 16 (Red/Light Green wire). If resistances are more than 10 k/ohms, replace PATS module and fuses, and retest system operation. If resistances are less than 10 k/ohms, repair short to ground in Dark Blue/Orange wire and/or Red/Light Green wire between instrument panel fuse block PATS module. Retest system operation.
- Check Circuits For Voltage
- Turn ignition off. Disconnect PATS module connector C217 (located behind lower left side of instrument panel). Turn ignition switch to RUN position. Using a voltmeter, check voltage between ground and PATS module connector C217 terminal No. 15 (Dark Blue/Orange wire). See Fig 1
. Check voltage between ground and PATS module connector C217 terminal No. 16 (Red/Light Green wire). If voltages are more than 10 volts, go to next step. If voltage(s) are 10 volts or less, repair appropriate circuit between instrument panel fuse block and PATS module. Retest system operation.
- Check Circuit For Open
- Turn ignition off. Using an ohmmeter, check resistance between ground and PATS module connector C217 terminal No. 7 (Black/White wire). See Fig 1
. If resistance is less than 5 ohms, problem is in data communication link. See appropriate MODULE COMMUNICATIONS NETWORK article. If resistance is 5 ohms or more, repair open in Black/White wire between PATS module and ground. Retest system operation.
Courtesy of FORD MOTOR CO.