DESCRIPTION
When the theft deterrent system is switched from the armed state to the alarm sounding state, the main body ECU (multiplex network body ECU) transmits a signal to cause the horns to sound at intervals of 0.4 seconds.
WIRING DIAGRAM
 
CAUTION / NOTICE / HINT
NOTICE:
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*1: w/ Smart Key System
PROCEDURE
| 1. | INSPECT HORNS | 
(a) Press the horn switch and check if the horns sound.
| Result | Proceed to | 
|---|---|
| Horns sound | A | 
| Horns do not sound | B | 
| B | .gif)  | GO TO HORN SYSTEM | 
| 
 | 
| 2. | INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY | 
(a) Remove the main body ECU (multiplex network body ECU).
Click here .gif) 
 
 
| *a | Component without harness connected (Instrument Panel Junction Block Assembly) | - | - | 
(b) Disconnect the instrument panel junction block assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition | 
|---|---|---|
| 3F-27 - MB-28 (HORN) | Always | Below 1 Ω | 
| OK | .gif)  | REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) | 
| NG | .gif)  | REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY | 
 Engine Hood Courtesy Switch Circuit
Engine Hood Courtesy Switch Circuit Security Horn Circuit
Security Horn CircuitToyota CH-R Service Manual > Can Communication System: Check Bus 5 Line for Short to +B
   DESCRIPTION
There may be a short circuit between one of the CAN bus lines and +B when no 
resistance exists between terminal 15 (CA5H) of the central gateway ECU (network 
gateway ECU) and terminal 16 (BAT) of the DLC3, or terminal 16 (CA5L) of the central 
gateway ECU (network gateway ECU) and  ...
   
Toyota CH-R Service Manual > Refrigerant Line: Installation
   INSTALLATION
PROCEDURE
1. INSTALL PIPING CLAMP (for DENSO Made)
(a) for Suction Hose Sub-assembly:
(1) Remove the vinyl tape from the open ends of the suction pipe sub-assembly 
and suction hose sub-assembly.
	
		
		(2) Install a new piping clamp to the suction hose sub-assembly.
		
			N ...