When the battery saving control operates, the main body ECU (multiplex network body ECU) controls the operation of the DOME CUT and DOME CUT NO. 2 relay to turn off the interior lights.
Inspect the fuses for circuits related to this system before performing the following procedure.
w/ Entry and Start System:
Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.
Perform the Active Test according to the display on the GTS.
| Tester Display | Measurement Item | Control Range | Diagnostic Note |
|---|---|---|---|
| Relay for Interior Light Auto Cut Function | DOME CUT relay | ON or OFF | When performing this Active Test, turn all the interior lights on.
·
OFF: DOME CUT relay on (interior lights turn on) ·
ON: DOME CUT relay off (interior lights turn off) |
| Tester Display |
|---|
| Relay for Interior Light Auto Cut Function |
All of the interior lights turn off when ON is selected.
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Remove the instrument panel junction block assembly.
| *A | for LHD | *B | for RHD |
| *a | Component without harness connected
(Instrument Panel Junction Block Assembly) |
- | - |
Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.
Measure the resistance according to the value(s) in the table below.
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A-23 (DOMR) - A-11 (GND1) | Battery not connected to 3E-1 and A-23 (DOMR) | 10 kΩ or higher |
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A-23 (DOMR) - A-11 (GND1) | Battery not connected to 3G-1 and A-23 (DOMR) | 10 kΩ or higher |
Measure the voltage according to the value(s) in the table below.
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| 3B-19 - Battery negative (-) terminal | Battery positive (+) → 3E-1
Battery negative (-) → A-23 (DOMR) |
11 to 14 V |
| Battery not connected to 3E-1 and A-23 (DOMR) | Below 1 V |
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| 3B-19 - Battery negative (-) terminal | Battery positive (+) → 3G-1
Battery negative (-) → A-23 (DOMR) |
11 to 14 V |
| Battery not connected to 3G-1 and A-23 (DOMR) | Below 1 V |
| Result | Proceed to |
|---|---|
| OK (for LHD) | A |
| OK (for RHD) | B |
| NG (for LHD) | C |
| NG (for RHD) | D |
A
B
C
D