B2272

2GR-FE STARTING: SMART KEY SYSTEM: B2272: Ignition 1 Monitor Malfunction

DTC B2272 - Ignition 1 Monitor Malfunction

DESCRIPTION

This DTC is output when there is a problem in the IG1D output circuit, which is from the inside of the main body ECU (instrument panel junction block) to the IG1 relay.
HINT: When the main body ECU (instrument panel junction block) is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.
After the main body ECU (instrument panel junction block) is replaced, perform the registration procedures for the engine immobiliser system Engine Immobiliser System (W/ Smart Key System).

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM
(a) Connect Techstream to the DLC3.
(b) Turn the engine switch on (IG) and turn Techstream main switch on.
(c) Select the item below in the Data List, and read the display on the tester.
HINT: When using Techstream with the engine switch off, turn on and off any of the door courtesy light switches repeatedly at 1.5 second intervals or less until communication between the tester and vehicle starts.

Main Body:

OK:
"ON" (engine switch on (IG)) appears on the screen.
NG -- INSPECT RELAY (IG1 RELAY)
OK -- Continue to next step.
2. CHECK ENGINE SWITCH CONDITION
(a) Check the power source mode change.
(1) When the key is inside the vehicle and the shift lever is in the P position, check that pressing the engine switch causes the power source mode to change as follows:
OK:
off -> on (ACC) -> on (IG) -> off
NG -- GO TO OTHER FLOW CHART
OK -- Continue to next step.
3. CHECK DTC OUTPUT
(a) Delete the DTCs Reading and Clearing Diagnostic Trouble Codes.
(b) Check for DTCs again.
OK:
No DTC is output.
NG -- REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)
OK -- USE SYMPTOM METHOD TO CHECK
4. INSPECT RELAY (IG1 RELAY)

(a) Remove the IG1 relay from the instrument panel junction block.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:

NG -- REPLACE IG1 RELAY
OK -- Continue to next step.
5. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - MAIN BODY ECU)
(a) Disconnect the 1I junction block connector.

(b) Disconnect the D8 ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - MAIN BODY ECU)
OK -- Continue to next step.
6. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - BATTERY AND BODY GROUND)

(a) Disconnect the 1F and 1A junction block connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - BATTERY AND BODY GROUND)
OK -- REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK