No Response From Adjustable Pedals Module
Possible Causes are:
- ATTEMPT TO COMMUNICATE WITH THE BCM
- FUSED B (+) CIRCUIT OPEN
- GROUND CIRCUIT OPEN
- OPEN PCI BUS CIRCUIT
- ADJUSTABLE PEDALS MODULE
NOTE:
Ensure there is PCI Bus communication with other modules on the vehicle before proceeding. If not, refer to the symptom list from the menu and repair as necessary.
- Turn ignition on. Using the DRBIII(R), enter Body, then Body Computer. Was the DRBIII(R) able to I/D or communicate with the BCM? If yes, go to next step. If no, go to BUS +/- SIGNALS OPEN OR NO RESPONSE FROM BODY CONTROL MODULE in DIAGNOSTIC TESTS. Refer to the symptom list for problems related to any communication with the BCM. Perform ADJUSTABLE PEDALS VERIFICATION TEST VER 1 under VERIFICATION TESTS.
- Turn ignition off. Disconnect the Adjustable Pedals Module harness connector. Using a 12-volt test light connected to ground, probe the Fused B+ circuit. Is the test light illuminated? If yes, go to next step. If no, repair the Fused B+ circuit for an open or short. See WIRING DIAGRAMS . Perform ADJUSTABLE PEDALS VERIFICATION TEST VER 1 under VERIFICATION TESTS.
- Turn ignition off. Disconnect the Adjustable Pedals Module harness connector. Using a 12-volt test light connected to 12 volts, probe each ground circuit. Is the test light illuminated for each circuit? If yes, go to next step. If no, repair the Ground circuit for an open. Perform ADJUSTABLE PEDALS VERIFICATION TEST VER 1 under VERIFICATION TESTS.
- Disconnect the Adjustable Pedals Module harness connector. Use Scope Input Cable (CH7058), Cable To Probe Adapter (CH7062), and the Red and Black test probes. Connect the scope input cable to the channel one connector on the DRBIII(R). Attach the Red and Black leads and the cable to probe adapter to the scope input cable. Using the DRBIII(R), select Pep Module Tools. Select lab scope. Select Live Data. Select 12-volt square wave. Press F2 for Scope. Press F2 and use the down arrow to set voltage range to 20 volts. Set the probe to x10. Press F2 again, when complete. Connect the Black lead to the chassis ground. Connect the Red lead to the PCI Bus circuit in the Adjustable Pedals Module connector. Turn ignition on. Observe the voltage display on the DRBIII(R) Lab Scope. Does the voltage pulse from 0 to approximately 7.5 volts? If yes, replace the Adjustable Pedals Module. Perform ADJUSTABLE PEDALS VERIFICATION TEST VER 1 under VERIFICATION TESTS. If no, repair the PCI Bus circuit for an open. Perform ADJUSTABLE PEDALS VERIFICATION TEST VER 1 under VERIFICATION TESTS.