TERMINALS OF ECU CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY
 (a) Disconnect the G35 air conditioning amplifier assembly connector.
(b) Measure the voltage and resistance according to the value(s) in the table below.
HINT: Measure the values on the wire harness side with the connector disconnected. |
Terminal No. (Symbol) | Wiring Color |
Terminal Description | Condition |
Specified Condition | |
G35-2 (IG+) - Body ground |
LA-GR - Body ground | IG power supply |
Power switch off | Below 1 V | |
G35-2 (IG+) - Body ground |
LA-GR - Body ground | IG power supply |
Power switch on (IG) |
11 to 14 V | |
G35-4 (GND) - Body ground |
W-B - Body ground | Ground |
Always | Below 1 Ω |
(c) Reconnect the G35 air conditioning amplifier assembly connector. (d) Measure the voltage and check for pulses generation according to the value(s) in the table below. |
Terminal No. (Symbol) | Wiring Color |
Terminal Description | Condition |
Specified Condition | |
G37-16 (SHP+) - G35-4 (GND) |
LG - W-B | Front seat heater control signal |
- Power switch on (IG)
- Seat heater switch (radio and display receiver assembly) on (LO)
(heater position)
| Below 1 V | |
G37-15 (SHD+) - G35-4 (GND) |
BE - W-B | Front seat heater control signal |
- Power switch on (IG)
- Seat heater switch (radio and display receiver assembly) on (LO)
(heater position)
| Below 1 V | |
G37-27 (HTR2) - G35-4 (GND) |
L - W-B | Rear seat heater control signal |
- Power switch on (IG)
- Rear seat heater switch (LH) on
| Below 1 V | |
G36-7 (HTR1) - G35-4 (GND) |
W - W-B | Rear seat heater control signal |
- Power switch on (IG)
- Rear seat heater switch (RH) on
| Below 1 V | |
G35-14 (LIN1) - Body ground |
LG - Body ground | Front seat heater switch signal |
Power switch on (IG) |
Pulse generation | |
G36-28 (SW 2) - Body ground |
G - Body ground | Rear seat heater switch signal |
- Power switch on (IG)
- Rear seat heater switch (LH) on
| 11 to 14 V | |
G36-26 (SW 1) - Body ground |
R - Body ground | Rear seat heater switch signal |
- Power switch on (IG)
- Rear seat heater switch (RH) on
| 11 to 14 V |
CHECK SEAT HEATER SWITCH (RADIO AND DISPLAY RECEIVER ASSEMBLY)
 (a) Disconnect the G20 seat heater switch (radio and display receiver assembly) connector.
(b) Measure the voltage and resistance according to the value(s) in the table below.
HINT: Measure the values on the wire harness side with the connector disconnected. |
Terminal No. (Symbol) | Wiring Color |
Terminal Description | Condition |
Specified Condition | |
G20-2 (IG+) - Body ground |
GR - Body ground | IG power supply |
Power switch off | Below 1 V | |
G20-2 (IG+) - Body ground |
GR- Body ground | IG power supply |
Power switch on (IG) |
11 to 14 V | |
G20-6 (GND) - Body ground |
W-B - Body ground | Ground |
Always | Below 1 Ω |
(c) Reconnect the G20 seat heater switch (radio and display receiver assembly) connector.
(d) Check for pulses according to the value(s) in the table below. |
Terminal No. (Symbol) | Wiring Color |
Terminal Description | Condition |
Specified Condition | |
G20-8 (LIN1) - Body ground |
LG - Body ground | Seat heater switch signal |
Power switch on (IG) |
Pulse generation | | 
