P102 3 - TURBO BOOST PRESSURE CIRCUIT FAILED HIGH (HIGH VOLTAGE)

TM 9-2320-364-20-1

2-14. DDEC III/IV TROUBLESHOOTING (CONT).

Section IV. TROUBLESHOOTING CHARTS (Cont.)

E. FLASH CODE:

J1587 CODE:

P102 3 - TURBO BOOST PRESSURE CIRCUIT FAILED HIGH (HIGH VOLTAGE)

NOTE - This chart is only to be used if:

1) All basic mechanical checks and physical inspections have been performed with no problem found; and,

2) Diagnosis of DDEC III/IV was started at step START-1, pg 2-539, and you have now been referred here.

STEP/SEQUENCE

RESULT

WHAT TO DO NEXT

33-1

Multiple Code Check

Were there any other active

No other codes.

Go to 33-2.

codes besides Code 102/3?

Yes, any or all

Go to ENG5V-1 (pg 2-761).

of the following codes:

110/3 or 4, 175/3 or 4,

174/3 or 4, 100/3 or 4.

Yes - but none

Go to 33-2.

of the above.

33-2

Sensor Check

Turn ignition off.

Code 102/4 (and

Go to 33-3.

Disconnect TBS connector

any codes except

(para 7-63).

Code 102/3).

Start and run engine at idle

(TM 9-2320-364-10).

Code 102/3 (and

Go to 33-5.

Read active codes with

any other codes).

engine running.

33-3

Return Circuit Check

Turn ignition off.

Less than or

Go to 33-4.

Install a jumper wire between

equal to 5 ohms.

pins A and B of the TBS

connector.

Greater than

Return line (ckt #452) is open.

Disconnect engine harness

5 ohms or open.

Repair open. Then go to

connector at the ECM.

33-30.

Read resistance between sockets

P1 and Y2 on the engine harness

connector.

33-4

Check TBS Connectors

Inspect terminals at the TBS

Terminals and

Replace TBS (para 7-63).

connectors (both the sensor and

connectors are okay.

Then go to 33-30.

harness side) for damage; bent,

corroded, and unseated pins or

Problem found.

Repair terminals/connectors

sockets.

(para 7-101). Then go to 33-30.

2-667