STEP/SEQUENCE RESULT WHAT TO DO NEXT TM 9-2320-363-20-1 Section 4 TROUBLESHOOTING CHARTS E. FLASH CODE: 22 (Cont'd) J1587 CODE: P91 4 · ELECTRONIC FOOT PEDAL ASM (EFPA) CIRCUIT FAILED HIGH (VOLTAGE LOW) ALSO CALLED THROTTLE POSITION SENSOR (TPS) 22-4 Attempt TPS Adjustment Check for pedal or linkage Corrected Go to 22-30. interferences. If linkages appear problem so that Throttle okay, loosen the TPS screws and Counts is now correct. attempt to adjust for the correct no throttle reading (48-144 counts). Could not correct the Go to 22-5. (NOTE: Newer version pedals problem. are non-adjustable.) Do not attempt to adjust by bending the pedal mechanism. 22-5 Check TPS Connectors Inspect terminals at the TPS Terminals and Replace TPS. Then go to connectors (sensor side and connectors are okay. 22-30. harness side) for damage, corrosion, and unseated pins or Problem found. Repair terminals/connectors. sockets. Then go to 22-30. 22-6 Check for +5 Volts Remove jumper Between Go to 22-7. Turn ignition on. 4 to 6 volts. Read voltage on TPS harness connector, socket C (red lead) to Less than Go to 22-10. socket A (black lead). 4 volts. Greater than Go to 22-12. 6 volts. 22-7 Check for Short Turn ignition off. Less than or Signal line (ckt#417 is shorted Disconnect the vehicle harness equal to 10,000 ohms to the return line (ckt #952) or connector at ECM. on either reading battery ground. Repair short. Read resistance between sockets Then go to 22-30. A and B on the TPS harness connector. Greater than Go to 22-8. Also read resistance between 10,000 ohms or open socket B and a good ground. on both readings. Change 3  3-345.239