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.
Engine Coolant Temperature Circuit Range / Performance Problem (P0116)
DESCRIPTION
Refer to DTC P0115 (See page ).
DTC No.
DTC Detection Condition
Trouble Area
P0116
When either of the following conditions is met (2 trip detection logic).
During engine ...
Back Door Entry Lock Function does not Operate
DESCRIPTION
If the back door entry lock function does not operate but the back door open
function operates, the communication between the vehicle and key is normal. As a
faulty part, the entry lock switch circuit (from the back door opener switch assembly ...
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
Use the table below to help determine the cause of problem symptoms. If multiple
suspected areas are listed, the potential causes of the symptoms are listed in order
of probability in the "Suspected Area" column of the tab ...