ELECTRONIC FOOT PEDAL ASM (EFPA) CIRCUIT FAILED LOW (VOLTAGE LOW) ALSO CALLED THROTTLE POSITION SENSOR (TPS) (cont) -726280721

TM 9-2320-364-20-1

Section IV. TROUBLESHOOTING CHARTS (Cont.)

E. FLASH CODE:

J1587 CODE:

P91 4 -

ELECTRONIC FOOT PEDAL ASM (EFPA) CIRCUIT FAILED HIGH

(VOLTAGE HIGH) ALSO CALLED THROTTLE POSITION SENSOR

(TPS)

STEP/SEQUENCE

RESULT

WHAT TO DO NEXT

22-4

(Deleted)

22-5

Check TPS

Connectors

Inspect terminals at the TPS

Terminals and

Replace TPS (para 7-58).

connectors (sensor side and

connectors are okay.

Then go to 22-30.

harness side) for damage,

corrosion, and unseated pins or

Problem found.

Repair terminals/connectors

sockets.

(para 7-101). Then go to 22-30.

22-6

Check for +5 Volts

Turn ignition off.

Between

Go to 22-7.

Remove jumper

4 to 6 volts.

Turn ignition on.

Read voltage on TPS

Less than

Go to 22-10.

connector, socket C (red lead) to

4 volts.

socket A (black lead).

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.

B and C on the TPS

connector.

Greater than

Go to 22-8.