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 |
D51-5 (KSW) - Body ground |
L - Body ground |
Unlock warning switch input |
No key in ignition key cylinder (OFF) → Key inserted (ON) |
10 kΩ or higher → Below 1 Ω |
2A-1 (ACC) - Body ground |
B - Body ground |
Ignition power supply (ACC signal) |
Ignition switch ACC → OFF |
11 to 14 V → Below 1 V |
2A-1 (IG) - Body ground |
B - Body ground |
Ignition power supply (IG signal) |
Ignition switch ON → 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 |
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 the 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 (Theft deterrent system is in alarm sounding state) |
Pulse generation (Below 1 V ← → 12 V) |
2C-25 (HORN) - Body ground |
R - Body ground |
Vehicle horn drive |
Vehicle horn sounding (Theft deterrent system is 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.
Inspection
INSPECTION
PROCEDURE
1. INSPECT ENGINE SWITCH
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
Switch Condition
Specified Condition
7 (SS1) ...
System Voltage (P0560)
DESCRIPTION
The battery supplies electricity to the TCM even when the ignition switch is
off. This power allows the TCM to store data such as DTC history and freeze frame
data. If the battery voltage falls below a minimum level, these memories are cleared ...
Utility vehicle feature
• Specific design characteristics give it a higher center of gravity than ordinary
passenger cars. This vehicle design feature causes this type of vehicle to be more
likely to rollover. And, utility vehicles have a significantly higher rollover rate
th ...