Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM100000002579D |
Model Year Start: 2023 |
Model: GR Corolla |
Prod Date Range: [09/2022 -
] |
Title: METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM (for 12.3 Inch Display): Power Source Circuit; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - ] |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.
-
When replacing the combination meter assembly, update the ECU security key.
Click here
-
Inspect the fuses of circuits related to this system before performing the following procedure.
PROCEDURE
1.
|
CHECK HARNESS AND CONNECTOR (IG POWER SOURCE CIRCUIT)
|
(a) Disconnect the I4 combination meter assembly connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
|
Condition
|
Specified Condition
|
I4-6 (IG+) - Body ground
|
Ignition switch off
|
Below 1 V
|
I4-6 (IG+) - Body ground
|
Ignition switch ON
|
10.5 to 16 V
|
|
|
*a
|
Front view of wire harness connector
(to Combination Meter Assembly)
|
|
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
2.
|
CHECK HARNESS AND CONNECTOR (+B POWER SOURCE CIRCUIT)
|
(a) Disconnect the I4 combination meter assembly connector.
(b) 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
|
|
|
*a
|
Front view of wire harness connector
(to Combination Meter Assembly)
|
|
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
3.
|
CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - BODY GROUND)
|
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
I4-1 (EP) - Body ground
|
Always
|
Below 1 Ω
|
I4-2 (ES) - Body ground
|
Always
|
Below 1 Ω
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
|