ELECTRONIC FOOT PEDAL ASM (EFPA) CIRCUIT FAILED HIGH (VOLTAGE HIGH) ALSO CALLED THROTTLE POSITION SENSOR (TPS) (cont) -726280715

TM 9-2320-364-20-1

Section IV. TROUBLESHOOTING CHARTS (Cont.)

E. FLASH CODE:

J1587 CODE:

P91 3 -

ELECTRONIC FOOT PEDAL ASM (EFPA) CIRCUIT FAILED HIGH

(VOLTAGE HIGH) ALSO CALLED THROTTLE POSITION SENSOR

(TPS)

STEP/SEQUENCE

RESULT

WHAT TO DO NEXT

21-5

(Deleted)

21-6

Check TPS

Connectors

Inspect terminals at the TPS

Terminals and

Replace TPS (Electronic Throttle)

connectors (sensor side and

connectors are okay.

(para 7-58). Then go to 21-30.

harness side) for damage; bent,

corroded, and unseated pins of

Problem found.

Repair terminals/connectors

sockets.

(para 7-101). Then go to 21-30.

21-7

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 vehicle + 5 volt line (ckt

connector at the ECM.

#916). Repair short. Then go to

Read resistance between sockets

21-30.

D2 and A3 on the vehicle harness

connector.

Greater than

Go to 21-8.

10,000 ohms or open.

21-8

Check for Short to

Battery +

Disconnect batteries (para 7-90).

All readings are

Go to 21-9.

Disconnect the vehicle harness

greater than 10,000 ohms

and 5-way power harness

or open.

connectors at the ECM.

Read resistance between socket

Any reading is

A short exists between the

D2 of the vehicle harness

less than or equal to

sockets where less than 10,000

connector and socket B3 of the

10,000 ohms.

ohms resistance was read.

vehicle harness connector.

Repair short. Then go to