B2272

1NZ-FXE STARTING: SMART KEY SYSTEM: B2272: Ignition 1 Monitor Malfunction

DTC B2272 - Ignition 1 Monitor Malfunction

DESCRIPTION

This DTC is output when a malfunction is occurring in the IG output circuit, which is from the IG1 relay actuation circuit inside the power source control ECU to the IG1 relay.






WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING DATA LIST (IG1 RELAY)
(a) Connect Techstream to the DLC3.
(b) Turn the power switch ON (IG) and press Techstream main switch ON.
(c) Select the items below in the DATA LIST and read the displays on Techstream.

Power source control ECU





OK:
ON (power switch ON (IG)) appears on the screen.
OK -- REPLACE POWER SOURCE CONTROL ECU
NG -- Continue to next step.

2. INSPECT IG1 RELAY




(a) Remove the IG1 relay from the driver side junction block.
(b) Measure the resistance of the relay.
Standard resistance:






NG -- REPLACE IG1 RELAY
OK -- Continue to next step.

3. CHECK WIRE HARNESS (DRIVER SIDE JUNCTION BLOCK - ECU AND BODY GROUND)




(a) Disconnect the 1J and 1E driver side junction block connectors.
(b) Disconnect the P6 ECU connector.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.

4. CHECK DRIVER SIDE JUNCTION BLOCK




(a) Remove the IG1 relay from the driver side junction block.
(b) Disconnect the 1J and 1E driver side junction block connectors.
(c) Measure the resistance of the driver side junction block.
Standard resistance:






NG -- REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY
OK -- REPLACE POWER SOURCE CONTROL ECU