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) 22-12 Check for Short to Battery + Turn ignition off. All readings are Go to 22-13. Remove both fuses to the ECM. greater than 10,000 Disconnect 5-way power connector ohms or open. at the ECM. Read resistance between sockets Any reading is A short exists between sockets D2 and B3 on the vehicle harness less than or equal where less than 10,000 ohms connector. to 10,000 ohms. resistance was read. Repair Also read resistance between short and reinsert fuses. Then socket D2 on the vehicle harness go to 22-30. connector and the following sockets on the 5-way power connector: B, C, D, & E. 22-13 Check for Outside DDEC Battery + Turn ignition off. All readings Go to 22-9. Remove ECM 5-pin power less than 4.0 volts. connectors. Remove ECM vehicle harness. Either reading Outside power is spliced into. Turn ignition on. greater than or equal either (ckt#952) or (ckt#916). Read voltage A3 (read lead) to a to 4.0 volts. Remove splice. Then go to good ground (black lead). 22-30. Read voltage C3 (red lead) to a good ground (black lead). 22-30 Verify Repairs Turn ignition off.   (No codes). Repairs are complete. Reconnect all connectors. Turn ignition on. Code 91/4 (and All system diagnostics are Clear codes. any other codes). complete. Please review this Note status of "Check Engine" section from the first step to find light. the error. If "Check Engine" light does not stay on, start engine and run until Any other codes Go to START-1, pg 3-345.41, "Check Engine" light comes on except Code 91/4. to service other codes. or 1 minute. Stop engine. Stop engine. Read all codes. Change 3  3-345.243