CHECK COMBINATION METER ASSEMBLY
Disconnect the F1 and F2 combination meter assembly connector.
Measure the voltage and resistance of the wire harness side connector.
Terminals No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
---|---|---|---|---|
F1-21 (ET) - Body ground | W-B - Body ground | Ground | Always | Below 1 Ω |
F1-39 (IG+) - Body ground | P - Body ground | Ignition switch signal | Ignition switch off → ON (IG) | Below 1 V → 11 to 14 V |
F1-40 (B) - Body ground | L - Body ground | Battery | Always | 11 to 14 V |
F2-1 (B) - Body ground | R - Body ground | Battery | Always | 11 to 14 V |
If the result is not as specified, there may be a malfunction in the wire harness.
Reconnect the F1 and F2 combination meter assembly connector.
Measure the voltage, resistance and check for pulses of the wire harness side connector.
Terminals No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
---|---|---|---|---|
F1-1 (RLMT) - Body ground | GR - Body ground | Rear LH seat belt warning light signal | Rear LH seat belt warning light ON → OFF | Below 1 V → 11 to 14 V |
F1-2 (RCMT) - Body ground | G - Body ground | Rear CENTER seat belt warning light signal | Rear CENTER seat belt warning light ON → OFF | Below 1 V → 11 to 14 V |
F1-3 (RRMT) - Body ground | B - Body ground | Rear RH seat belt warning light signal | Rear RH seat belt warning light ON → OFF | Below 1 V → 11 to 14 V |
F1-5 (SI) - Body ground | L - Body ground | Speed signal (Input) | Driving at approximately 20 km/h (12 mph) |
Pulse generation (See waveform 1) |
F1-6 (+S) - Body ground | SB - Body ground | Speed signal (Output) | Driving at approximately 20 km/h (12 mph) |
Pulse generation (See waveform 1) |
F1-7 (P/SB) - Body ground | P - Body ground | Front seat inner belt assembly signal (passenger side) | Front passenger seat is occupied and its seat belt is unfastened → fastened | Below 1 V → 11 to 14 V |
F1-9 (S) - Body ground | Y - Body ground | Engine oil pressure signal | Engine oil pressure warning light ON → OFF | Below 1 V → 11 to 14 V |
F1-11 (CHK) - Body ground | LG - Body ground | Check engine warning light signal | Check engine warning light ON → OFF | Below 1 V → 11 to 14 V |
F1-14 (-) - Body ground | BR - Body ground | High beam indicator signal (-) | Always | Below 1 V |
F1-16 (L) - Body ground | G - Body ground | Fuel level signal | Ignition switch ON (IG) Fuel level is FULL → EMPTY |
Below 1 V → 4.5 to 9.0 V |
F1-19 (+) - Body ground | GR - Body ground | High beam indicator signal (+) | High beam indicator ON → OFF | 11 to 14 V → Below 1 V |
F1-20 (ILL+) - Body ground | R - Body ground | Taillight signal | Light control switch off → on | Below 1 V → 11 to 14 V |
F1-24 (RLSB) - Body ground | V - Body ground | Rear seat inner belt assembly signal (LH side) | Rear LH seat belt is unfastened → fastened | Below 1 V → 11 to 14 V |
F1-25 (RCSB) - Body ground | R - Body ground | Rear seat inner belt assembly signal (Center side) | Rear CENTER seat belt is unfastened → fastened | Below 1 V → 11 to 14 V |
F1-26 (RRSB) - Body ground | BE - Body ground | Rear seat inner belt assembly signal (RH side) | Rear RH seat belt is unfastened → fastened | Below 1 V → 11 to 14 V |
F1-31 (CANL) - Body ground | W - Body ground | CAN communication line | Ignition switch ON (IG) | Pulse generation |
F1-32 (CANH) - Body ground | G - Body ground | CAN communication line | Ignition switch ON (IG) | Pulse generation |
F2-3 (HAZ) - Body ground | L - Body ground | Hazard warning signal switch signal | Hazard warning signal switch off | 11 to 14 V |
Hazard warning signal switch on | Below 1 Ω | |||
F2-6 (TAIL) - Body ground | LG - Body ground | Taillight signal | Light control switch off → on | Below 1 V → 11 to 14 V |
F2-7 (LR) - Body ground | V - Body ground | Right turn signal | Ignition switch ON (IG) Right turn indicator light OFF → ON |
Below 1 V → 11 to 14 V |
F2-9 (ER) - Body ground | B - Body ground | Turn signal switch RH signal | Turn signal switch RH on | 11 to 14 V |
Turn signal switch RH off | Below 1 Ω | |||
F2-10 (EL) - Body ground | Y - Body ground | Turn signal switch LH signal | Turn signal switch LH on | 11 to 14 V |
Turn signal switch LH off | Below 1 Ω | |||
F2-11 (S) - Body ground | SB - Body ground | Rear fog signal | Ignition switch ON (IG) Rear fog switch off → on |
Below 1 V → 11 to 14 V |
F2-12 (FOG)*1 - Body ground | BE - Body ground | Front fog signal | Ignition switch ON (IG) Front fog switch off → on |
Below 1 V → 11 to 14 V |
F2-13 (LL) - Body ground | LG - Body ground | Left turn signal | Ignition switch ON (IG) Left turn indicator light OFF → ON |
Below 1 V → 11 to 14 V |
*1: w/ Fog Light
If the result is not as specified, the combination meter assembly may have a malfunction.
Waveform 1: Using an oscilloscope
Terminal Connections | F1-6 (+S) - Body ground F1-5 (SI) - Body ground |
Tool Setting | 5 V/DIV., 20 ms./DIV. |
Condition | Driving at approximately 20 km/h (12 mph) |
Tech Tips
As the vehicle speed increases, the cycle of the signal waveform narrows.
CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
*a | Instrument Panel Junction Block Assembly | *b | Main Body ECU (Multiplex Network Body ECU) |
Remove the main body ECU (multiplex network body ECU) Click here.
Measure the resistance and voltage between each terminal of the wire harness side connectors and body ground.
Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
---|---|---|---|---|
MB-11 (GND1) - Body ground | None - Body ground | Ground | Always | Below 1 Ω |
MB-29 (ACC) - Body ground | None - Body ground | Ignition power supply (ACC signal) | Ignition switch ACC | 11 to 14 V |
MB-30 (BECU) - Body ground | None - Body ground | +B (power system signal system) power supply | Always | 11 to 14 V |
MB-32 (IG) - Body ground | None - Body ground | Ignition power supply (IG signal) | Ignition switch ON (IG) | 11 to 14 V |
If the result is not as specified, there may be a malfunction on the wire harness side.
Install the main body ECU (multiplex network body ECU).
Measure the voltage between each terminal of the wire harness side connectors and body ground.
Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
---|---|---|---|---|
3A-28 (PKB) - Body ground | R - Body ground | Parking brake signal | Parking brake warning light ON → OFF | Below 1 V → 11 to 14 V |
3D-34 (DBKL) - Body ground | W - Body ground | Front seat inner belt assembly signal (driver side) | Driver seat belt warning light OFF → ON | Below 1 V → 11 to 14 V |
F57-13 (CANL) - Body ground | W - Body ground | CAN communication line | Ignition switch ON (IG) | Pulse generation |
F57-14 (CANH) - Body ground | R - Body ground | CAN communication line | Ignition switch ON (IG) | Pulse generation |
If the result is not as specified, there may be a malfunction in the wire harness.
COMBINATION METER INTERNAL CIRCUIT
Terminal No. | Wire Harness Side | |
---|---|---|
F1 | 1 | Telltale light assembly (Rear Seat LH) |
2 | Telltale light assembly (Rear Seat CENTER) | |
3 | Telltale light assembly (Rear Seat RH) | |
5 | Brake booster with master cylinder assembly (skid control ECU) | |
6 | Other ECU | |
7 | Occupant detection sensor and Front seat inner belt assembly (Front passenger side) | |
9 | Engine oil pressure switch assembly | |
11 | ECM | |
14 | Body ground | |
16 | Fuel sender gauge assembly | |
19 | H-LP LH HI fuse | |
20 | Panel fuse | |
21 | Body ground | |
24 | Rear seat inner belt assembly LH | |
25 | Rear seat inner belt assembly CENTER | |
26 | Rear seat inner belt assembly RH | |
31 | CAN communication line | |
32 | CAN communication line | |
39 | IG2 relay | |
40 | Auxiliary battery | |
F2 | 1 | Auxiliary battery |
3 | Telltale light assembly | |
6 | Panel fuse | |
7 | Turn signal light RH | |
9 | Headlight dimmer switch assembly (Turn signal switch) | |
10 | Headlight dimmer switch assembly (Turn signal switch) | |
11 | FOG RR relay | |
12 | FOG FR relay*1 | |
13 | Turn signal light LH |
*1: w/ Fog Light