Test Procedure

AE1 CARRY OUT A VEHICLE INSPECTION AND VERIFY THE SELF-TEST PROCEDURE

NOTE: The scan tool resets if battery voltage is less than 9.5 volts. If carrying out repeated self-tests, disable the glow plug control module (GPCM) and disregard the glow plug codes while the GPCM is disabled. If equipped with a power take-off (PTO) system, it must be disabled while carrying out the PCM self-tests.

Check the battery voltage.
Verify that the correct procedure was used to activate the self-test for the scan tool. Refer to DIAGNOSTIC METHODS .

Was the correct self-test procedure used?

Yes	No
GO to AE2.	REFER to DIAGNOSTIC METHODS for the correct operating procedures.

AE2 CARRY OUT THE NETWORK TEST

Ignition ON, engine OFF.
Carry out the network test.

Do all modules indicate pass?

Yes	No
For DTCs U0100 and U0101, GO to AE6. For DTC U0105, GO to AE7. For DTC U0155, GO to AE8.	For only PCM indicates fail, GO to AE3. For network test or all other modules indicates fail, REFER to the appropriate Module Communications Network article to continue no response from the scan tool diagnosis.

AE3 CHECK THE PCM VPWR CIRCUITS FOR VOLTAGE

Ignition OFF.
PCM connector disconnected.
Ignition ON, engine OFF.

Measure the voltage between:

VOLTAGE REFERENCE CHART

(+) PCM Connector, Harness Side	(-)
VPWR - Pin B34, B46	Ground

Are the voltages greater than 10.5 V?

Yes	No
GO to AE4.	GO to PINPOINT TEST A .

AE4 CHECK THE PWRGND CIRCUITS FOR AN OPEN

Ignition OFF.

Measure the resistance between:

RESISTANCE REFERENCE CHART

(+) PCM Connector, Harness Side	(-)
PWRGND - Pin B10, B11, B23	Ground

Are the resistances less than 5 ohms?

Yes	No
GO to AE5.	REPAIR the open circuit. CLEAR the DTCs. REPEAT the self-test.

AE5 CHECK THE VREF CIRCUITS FOR A SHORT TO GROUND

PCM connector disconnected.

Measure the resistance between:

RESISTANCE REFERENCE CHART

(+) PCM Connector, Harness Side	(-)
VREF - Pin B29, B45, E36	Ground

Are the resistances greater than 10K ohms?

Yes	No
GO to AE9.	REPAIR the short circuit. CLEAR the DTCs. REPEAT the self-test.

AE6 DTCS U0100 AND U0101: CHECK FOR A TRANSAXLE/TRANSMISSION CONTROL MODULE (TCM) CONCERN

Check for any TCM DTCs.
Check for other TCM related symptoms.

Are any concerns present?

Yes	No
REFER to the appropriate Automatic Transaxle/Transmission article , to continue diagnosis of TCM related symptoms or DTCs.	GO to AE9.

AE7 DTC U0105: CHECK FOR A FUEL INJECTION CONTROL MODULE (FICM) CONCERN

Check for any FICM DTCs.
Check for other FICM related symptoms.

Are any concerns present?

Yes	No
GO to PINPOINT TEST AS .	GO to AE9.

AE8 CHECK FOR A INSTRUMENT PANEL CLUSTER (IC) CONTROL MODULE CONCERN

Check for any IC DTCs.
Check for other IC related symptoms.

Are any concerns present?

Yes	No
REFER to the appropriate Instrumentation, Message Center, and Warning Chimes article , to continue diagnosis of IC related symptoms or DTCs.	GO to AE9.

AE9 CHECK FOR CORRECT PCM OPERATION

Disconnect all the PCM connectors.
Visually inspect for:
- pushed out pins
- corrosion
Connect all the PCM connectors and make sure they seat correctly.
Carry out the network test and verify the concern is still present.
Carry out the PCM self-test and verify the concern is still present.

Is the concern still present?

Yes	No
INSTALL a new PCM. Refer to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) , PROGRAMMING THE VID BLOCK FOR A REPLACEMENT PCM .	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.