TERMINALS OF ECU
1. CHECK MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)
(a) Disconnect the main body ECU (driver side junction block assembly) connectors.
(b) Measure the resistance and voltage according to the value(s) in the table below.
Tester Connection |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
D49-7 (RCTY) - Body ground |
GR - Body ground |
Rear courtesy light switch RH input |
Rear door RH closed (OFF) → open (ON) |
10 kΩ or higher → Below 1 Ω |
D49-21 (PCTY) - Body ground |
V - Body ground |
Passenger side courtesy light switch input |
Passenger side door closed (OFF) → open (ON) |
10 kΩ or higher → Below 1 Ω |
D49-25 (BCTY) - Body ground |
GR - Body ground |
Back door courtesy light switch input |
Back door closed (OFF) → open (ON) |
10 kΩ or higher → Below 1 Ω |
D50-16 (HCTY) - Body ground |
BE - Body ground |
Security courtesy switch |
Engine hood closed (OFF) → open (ON) |
10 kΩ or higher → Below 1 Ω |
D50-24 (DCTY) - Body ground |
V - Body ground |
Driver side door courtesy light switch input |
Driver side door closed (OFF) → open (ON) |
10 kΩ or higher → Below 1 Ω |
2A-1 (ACC) - Body ground |
B - Body ground |
Ignition power supply (ACC signal) |
Engine switch on (ACC) → OFF |
11 to 14 V → Below 1 V |
2A-1 (IG) - Body ground |
B - Body ground |
Ignition power supply (IG signal) |
Engine switch on (IG) → OFF |
11 to 14 V → Below 1 V |
2C-30 (ALTB) - Body ground |
BR - Body ground |
+B (power system alternator system) power supply |
Always |
11 to 14 V |
2F-16 (GND1) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
2C-24 (BECU) - Body ground |
L - Body ground |
+B power supply |
Always |
11 to 14 V |
2C-24 (BECU) - Body ground |
L - Body ground |
+B power supply |
Always |
11 to 14 V |
2O-19 (LCTY) - Body ground |
R - Body ground |
Rear courtesy light switch LH input |
Rear door LH closed (OFF) → open (ON) |
10 kΩ or higher → Below 1 Ω |
If the result is not as specified, there may be a malfunction in the wire harness.
HINT:
Measure values on the wire harness side with the connectors disconnected.
(c) Reconnect the main body ECU (driver side junction block assembly) connectors.
(d) Measure the voltage according to the value(s) in the table below.
Tester Connection |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
D48-4 (HAZ) - Body ground |
G - Body ground |
Turn signal flasher relay signal |
System in alarm sounding state |
Below 1 V |
D51-4 (IND) - Body ground |
SB - Body ground |
Security indicator output |
Security indicator on (It lights up only in arming preparation state or alarm sounding state. It flashes when immobiliser is operating.) |
3 to 6 V |
D51-6 (SH) - Body ground |
BR - Body ground |
Security horn drive |
Security horn sounding |
Pulse generation (Below 1 V ← → 12 V) |
2C-25 (HORN) - Body ground |
R - Body ground |
Vehicle horn drive |
Vehicle horn sounding (Theft deterrent system in alarm sounding state) |
Pulse generation (Below 1 V ← → 12 V) |
If the result is not as specified, the main body ECU (driver side junction block assembly) may have a malfunction.
Noise Occurs
PROCEDURE
1.
NOISE CONDITION
(a) Check from which direction the noise comes (front left or right, or rear
left or right).
OK:
The location of the noise source can be determined.
NG
GO TO STEP 3
...
Lost Communication with Rear Gate Module (U0230)
DESCRIPTION
DTC No.
DTC Detection Condition
Trouble Area
U0230
No communication from the power back door ECU (back door motor unit)
or back door closer ECU continues.
Power ...
Vehicle Speed Signal Malfunction (C1541)
DESCRIPTION
The power steering ECU receives vehicle speed signals from the brake actuator
assembly (skid control ECU) via CAN communication. The ECU provides appropriate
assisting force in accordance with the vehicle speed, based on the signals.
...