Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

PERFORM SELF DIAGNOSTIC RESULT
Perform "Self Diagnostic Result" of "IPDM E/R" using CONSULT.

Is display history of DTC B20A9 CRNT?

YES

GO TO 2.

NO

Refer to Intermittent Incident .

CHECK FUSIBLE LINK IGNITION SWITCH CIRCUIT VOLTAGE

Check voltage between IPDM E/R connector E17 and ground.

IPDM E/R

Ground

Voltage

(Approx.)

Connector

Terminal

E17

Battery voltage

Is the inspection result normal?

YES

GO TO 3.

Check fusible link M (40A) and fusible link ignition switch circuit for open. Repair or replace harness or connectors.

CHECK STARTER CONTROL CIRCUIT VOLTAGE

Check voltage between IPDM E/R connector E19 and ground.

IPDM E/R		Ground	Condition		Voltage (Approx.)
Connector	Terminal		Ignition switch	CVT selector lever
E19	33	-	ON	P or N	Battery voltage
				Any position other than P or N	0V

Is the inspection result normal?

YES

Replace IPDM E/R. Refer to Removal and Installation .

GO TO 4.

CHECK STARTER CONTROL CIRCUIT FOR OPEN

Disconnect IPDM E/R connector E19 and BCM connector M20.

Check continuity between IPDM E/R connector E19 and BCM connector M20.

IPDM E/R		BCM		Continuity
Connector	Terminal	Connector	Terminal	Continuity
E19	33	M20	62	Yes

Is the inspection result normal?

YES

Replace BCM. Refer to Removal and Installation .

Repair or replace harness or connectors.