Test Procedure

BB1 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS)

NOTE: Turn the ignition OFF for 15 seconds before carrying out the self-test or clearing DTCs. Refer to QUICK TEST DESCRIPTION , for additional information.

NOTE: The DTC P0887 may set as a result of a low 12 volt battery concern.

NOTE: The DTC P0562 and DTC U3003 may be set in addition to DTC P0887. Diagnose all other DTCs before entering this pinpoint test.

Are DTCs P0886, P0887, P2531, or P2533 present?

Yes	No
GO to BB2.	If sent to this test from Pinpoint Test BC, GO to BB2. For all others, GO to BB3.

BB2 CHECK THE BATTERY AND CHARGING SYSTEM

Check the battery and charging system voltages. Refer to the Charging System article.

Are the battery and charging system voltages within specification?

Yes	No
GO to BB4.	REPAIR as necessary. REFER to the Charging System article. Clear the SOBDMC DTCs. REPEAT the self-test.

BB3 CHECK THE B+ CIRCUIT FOR VOLTAGE

Ignition OFF.
TCM-A connector disconnected.
Ignition ON, engine OFF.
Measure the voltage between:

(+) TCM-A Connector, Harness Side	(-)
B+ - Pin 6	Ground

Is the voltage greater than 10.5 V?

Yes	No
GO to BB4.	REPAIR the open circuit. Clear the SOBDMC DTCs. REPEAT the self-test.

BB4 CHECK THE TCMRC CIRCUIT FOR AN OPEN

Ignition OFF.
BJB-B connector disconnected.

Measure the resistance between:

(+) BJB-B Connector, Harness Side	(-) TCM-A Connector, Harness Side
TCMRC - Pin 39	TCMRC - Pin 40

Is the resistance less than 5 ohms?

Yes	No
GO to BB5.	REPAIR the open circuit. Clear the SOBDMC DTCs. REPEAT the self-test.

BB5 CHECK THE TCMRC CIRCUIT FOR A SHORT TO GROUND

Measure the resistance between:

(+) TCM-A Connector, Harness Side	(-)
TCMRC - Pin 40	Ground

Is the resistance greater than 10K ohms?

Yes	No
GO to BB6.	REPAIR the short circuit. Clear the SOBDMC DTCs. REPEAT the self-test.

BB6 CHECK THE TCMRC CIRCUIT FOR A SHORT TO VOLTAGE

Ignition ON, engine OFF.

Measure the voltage between:

(+) TCM-A Connector, Harness Side	(-)
TCMRC - Pin 40	Ground

Is any voltage present?

Yes	No
REPAIR the short circuit. Clear the SOBDMC DTCs. REPEAT the self-test.	GO to BB7.

BB7 CHECK FOR AN OPEN VPWR CIRCUIT

Ignition OFF.

Measure the resistance between:

(+) BJB-B Connector, Harness Side	(-) TCM-A Connector, Harness Side
VPWR - Pin 46	VPWR - Pin 10, 9

Are the resistances less than 5 ohms?

Yes	No
GO to BB8.	REPAIR the open circuit. Clear the SOBDMC DTCs. REPEAT the self-test.

BB8 CHECK THE TCM VPWR CIRCUIT FOR VOLTAGE

Ignition ON, engine OFF.

Measure the voltage between:

(+) TCM-A Connector, Harness Side	(-)
VPWR - Pin 29	Ground

Is the voltage greater than 10.5 V?

Yes	No
GO to BB9.	REPAIR the open circuit. Clear the SOBDMC DTCs. REPEAT the self-test.

BB9 CHECK THE TCM VPWR CIRCUITS FOR A SHORT TO VOLTAGE

Ignition OFF.
Run Start Relay connector disconnected.
Ignition ON, engine OFF.

Measure the voltage between:

(+) TCM-A Connector, Harness Side	(-)
VPWR - Pin 10, 29, 9	Ground

Is any voltage present?

Yes	No
REPAIR the short circuit. Clear the SOBDMC DTCs. REPEAT the self-test.	GO to BB10.

BB10 CHECK THE VPWR CIRCUITS FOR VOLTAGE

Ignition OFF.
BJB-B connector connected.
Run Start Relay connector connected.

Connect a 5 amp fused jumper wire between the following:

Point A TCM-A Connector, Harness Side	Point B
TCMRC - Pin 40	Ground

Ignition ON, engine OFF.

Measure the voltage between:

(+) TCM-A Connector, Harness Side	(-)
VPWR - Pin 10, 29, 9	Ground

Is the voltage greater than 10.5 V?

Yes	No
GO to PINPOINT TEST Z .	INSTALL a new BJB. Clear the SOBDMC DTCs. REPEAT the self-test.