Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - DOOR / HATCH
POWER BACK DOOR SYSTEM - TERMINALS OF ECU
| CHECK POWER BACK DOOR UNIT ASSEMBLY (POWER BACK DOOR ECU) |
Disconnect the L52 power back door unit assembly (power back door ECU) connector.
Measure the voltage and resistance according to the value(s) in the table below.
| Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
| L52-10 (ECUB) - Body ground | R - Body ground | ECUB power supply | Always | 11 to 14 V |
| L52-12 (B) - Body ground | B - Body ground | Power supply | Always | 11 to 14 V |
| L52-8 (IG) - Body ground | G - Body ground | IG power supply | Engine switch on (IG) | 11 to 14 V |
| L52-8 (IG) - Body ground | G - Body ground | IG power supply | Engine switch off | Below 1 V |
| L52-15 (OSL) - L52-14 (OSE) | G - BR*1 G - BE*2 |
Power back door sensor LH circuit | Power back door sensor LH not pressed | Approximately 1 kΩ |
| L52-15 (OSL) - L52-14 (OSE) | G - BR*1 G - BE*2 |
Power back door sensor LH circuit | Power back door sensor LH pressed | Below 100 Ω |
| L52-13 (OSR) - L52-14 (OSE) | Y - BR*1 P - BE*2 |
Power back door sensor RH circuit | Power back door sensor RH not pressed | Approximately 1 kΩ |
| L52-13 (OSR) - L52-14 (OSE) | Y - BR*1 P - BE*2 |
Power back door sensor RH circuit | Power back door sensor RH pressed | Below 100 Ω |
| L52-11 (GND) - Body ground | W-B - Body ground | Body ground | Always | Below 1 Ω |
| L52-17 (MSW) - Body ground | G - Body ground | Power back door main switch signal circuit | Power back door main switch not pushed (on) | Below 1 Ω |
| L52-17 (MSW) - Body ground | G - Body ground | Power back door main switch signal circuit | Power back door main switch pushed (off) | 10 kΩ or higher |
| L52-4 (DS1) - Body ground | R - Body ground | Back door control switch signal circuit | Back door control switch on | Below 1 Ω |
| L52-4 (DS1) - Body ground | R - Body ground | Back door control switch signal circuit | Back door control switch off | 10 kΩ or higher |
If the result is not as specified, there may be a malfunction on the wire harness side.
Reconnect the L52 power back door unit assembly (power back door ECU) connector.
Measure the voltage according to the value(s) in the table below.
| Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
| L52-26 (BZR+) - Body ground | L - Body ground | Power back door warning buzzer signal input | Power back door warning buzzer sounding | Pulse generation (See waveform 1) |
| L52-26 (BZR+) - Body ground | L - Body ground | Power back door warning buzzer signal input | Power back door warning buzzer stopped | Below 1 V |
| L52-2 (DC+) - L52-1 (DC-) | R - B | Power back door lock motor circuit | Power back door lock motor operating | 11 to 14 V |
| L52-2 (DC+) - L52-1 (DC-) | R - B | Power back door lock motor circuit | Power back door lock motor stopped | Below 1 V |
| L52-17 (MSW) - Body ground | G - Body ground | Power back door main switch signal circuit | Power back door main switch not pushed (on) | Below 1 V |
| L52-17 (MSW) - Body ground | G - Body ground | Power back door main switch signal circuit | Power back door main switch pushed (off) | Pulse generation (See waveform 2) |
| L52-20 (FUL) - Body ground | W - Body ground | Back door courtesy switch signal circuit | Back door opened | Below 1 V |
| L52-20 (FUL) - Body ground | W - Body ground | Back door courtesy switch signal circuit | Back door closed | Pulse generation (See waveform 3) |
| L52-4 (DS1) - Body ground | R - Body ground | Back door control switch signal circuit | Back door control switch on | Below 1 V |
| L52-4 (DS1) - Body ground | R - Body ground | Back door control switch signal circuit | Back door control switch off | Pulse generation (See waveform 4) |
| L52-22 (HAF) - Body ground | G - Body ground | Back door lock half-latch switch signal circuit | Back door opened | Below 1 V |
| L52-22 (HAF) - Body ground | G - Body ground | Back door lock half-latch switch signal circuit | Back door closed | Pulse generation (See waveform 5) |
| L52-24 (POS) - Body ground | B - Body ground | Back door lock position switch signal circuit | Back door closed | Below 1 V |
| L52-24 (POS) - Body ground | B - Body ground | Back door lock position switch signal circuit | Back door opened | Pulse generation (See waveform 6) |
| L52-23 (CYLH) - Body ground | G - Body ground | Lower tail gate courtesy switch LH circuit | Lower tail gate opened | Below 1 V |
| L52-23 (CYLH) - Body ground | G - Body ground | Lower tail gate courtesy switch LH circuit | Lower tail gate closed | Pulse generation (See waveform 7) |
| L52-7 (CYRH) - Body ground | Y - Body ground*1 P - Body ground*2 |
Lower tail gate courtesy switch RH circuit | Lower tail gates opened | Below 1 V |
| L52-7 (CYRH) - Body ground | Y - Body ground*1 P - Body ground*2 |
Lower tail gate courtesy switch RH circuit | Lower tail gate closed | Pulse generation (See waveform 8) |
*1: Model code: GRJ200L-GNANKC, URJ202L-GNTEKC
*2: Model code except: GRJ200L-GNANKC, URJ202L-GNTEKC
Using an oscilloscope, check waveform 1.
| Item | Content |
| Terminal (Symbol) | L52-26 (BZR+) - Body ground |
| Tool Setting | 5 V/DIV., 1 ms/DIV |
| Condition | Power back door warning buzzer sounding |
Using an oscilloscope, check waveform 2.
| Item | Content |
| Terminal (Symbol) | L52-17 (MSW) - Body ground |
| Tool Setting | 5 V/DIV., 10 ms/DIV |
| Condition | Power back door main switch pushed (off) |
Using an oscilloscope, check waveform 3.
| Item | Content |
| Terminal (Symbol) | L52-20 (FUL) - Body ground |
| Tool Setting | 5 V/DIV., 10 ms/DIV |
| Condition | Back door closed |
Using an oscilloscope, check waveform 4.
| Item | Content |
| Terminal (Symbol) | L52-4 (DS1) - Body ground |
| Tool Setting | 5 V/DIV., 10 ms/DIV |
| Condition | Back door lock control switch off |
Using an oscilloscope, check waveform 5.
| Item | Content |
| Terminal (Symbol) | L52-22 (HAF) - Body ground |
| Tool Setting | 5 V/DIV., 10 ms/DIV |
| Condition | Back door closed |
Using an oscilloscope, check waveform 6.
| Item | Content |
| Terminal (Symbol) | L52-24 (POS) - Body ground |
| Tool Setting | 5 V/DIV., 10 ms/DIV |
| Condition | Back door opened |
Using an oscilloscope, check waveform 7.
| Item | Content |
| Terminal (Symbol) | L52-23 (CYLH) - Body ground |
| Tool Setting | 5 V/DIV., 10 ms/DIV |
| Condition | Lower tail gate closed |
Using an oscilloscope, check waveform 8.
| Item | Content |
| Terminal (Symbol) | L52-7 (CYRH) - Body ground |
| Tool Setting | 5 V/DIV., 10 ms/DIV |
| Condition | Lower tail gate closed |
| CHECK MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH) |
Disconnect the 2A, 2B, 2D, E2 and E3 main body ECU (cowl side junction block LH) connectors.
Measure the voltage and resistance according to the value(s) in the table below.
| Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
| 2B-20 (BATB) - Body ground | L - Body ground | Battery power supply | Always | 11 to 14 V |
| 2A-1 (ACC) - Body ground | B - Body ground | ACC power supply | Always | 11 to 14 V |
| E2-2 (PBDS) - Body ground | R - Body ground | Door control switch circuit | Door control switch pushed (on) | Below 1 Ω |
| E2-2 (PBDS) - Body ground | R - Body ground | Door control switch circuit | Door control switch not pushed (off) | 10 kΩ or higher |
| 2D-62 (GND2) - Body ground | W-B - Body ground | Ground | Always | Below 1 Ω |
| E3-1 (GND3) - Body ground | BR - Body ground | Ground | Always | Below 1 Ω |
If the result is not as specified, there may be a malfunction in the wire harness.
Reconnect the 2A, 2B, 2D, E2 and E3 ECU (cowl side junction block LH) connectors.
Measure the voltage according to the value(s) in the table below.
| Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
| E2-2 (PBDS) - Body ground | R - Body ground | Door control switch circuit | Door control switch pushed (on) | Below 1 V |
| E2-2 (PBDS) - Body ground | R - Body ground | Door control switch circuit | Door control switch not pushed (off) | Pulse generation (See waveform 1 or 2) |
Using an oscilloscope, check waveform.
| Item | Content |
| Terminal (Symbol) | E2-2 (PBDS) - Body ground |
| Tool Setting | 5 V/DIV., 10 ms/DIV |
| Condition | Door control switch not pushed (off) |
Using an oscilloscope, check waveform.
| Item | Content |
| Terminal (Symbol) | E2-2 (PBDS) - Body ground |
| Tool Setting | 5 V/DIV., 10 ms/DIV |
| Condition | Door control switch not pushed (off) |