Combination Meter ECU Communication Stop Mode [09/2022 - 11/2022]: Procedure

WARNING: This page is about a different car, the 2023 Toyota GR Corolla and 2023 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR OPEN IN CAN BUS LINES (COMBINATION METER ASSEMBLY MAIN BUS LINE)

Disconnect the cable from the negative (-) battery terminal.
Disconnect the I5 combination meter assembly connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
I5-31 (CANH) - I5-14 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Front view of wire harness connector (to Combination Meter Assembly)

Result

Result
OK
NG

Result:

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (COMBINATION METER ASSEMBLY)

Result:

See step 2

CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

Disconnect the I4 combination meter assembly connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
I4-1 (EP) - Body ground	Cable disconnected from negative (-) battery terminal	Below 1 Ω
I4-2 (ES) - Body ground	Cable disconnected from negative (-) battery terminal	Below 1 Ω

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Front view of wire harness connector (to Combination Meter Assembly)

Reconnect the cable to the negative (-) battery terminal.

Measure the voltage according to the value(s) in the table below.

Standard Voltage

Tester Connection	Condition	Specified Condition
I4-5 (B) - Body ground	Always	11 to 14 V
I4-6 (IG+) - Body ground	Ignition switch ON	11 to 14 V

Result

Result
OK
NG

Result:

REPLACE COMBINATION METER ASSEMBLY

Refer to REMOVAL [09/2022 - 11/2022]

Result:

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)