WIRING SYSTEM > Basic Diagnostic Procedure
BASIC PROCEDURES
1. GENERAL DESCRIPTION
The most important purpose of diagnostics is to quickly determine which part is malfunctioning, to save time and labor.
2. IDENTIFICATION OF TROUBLE SYMPTOM
Determine what the problem is based on the symptom.
3. PROBABLE CAUSE OF TROUBLE
Look at the wiring diagram and check the system’s circuit. Then check the switch, relay, fuse, ground, etc.
4. LOCATION AND REPAIR OF TROUBLE
1. Using the diagnostics, narrow down the causes.
2. If necessary, use a voltmeter, ohmmeter, etc.
3. Before replacing certain component parts (switch, relay, etc.), check the power supply, ground, for open wiring harness, poor connectors, etc. If no problem is encountered, check the component parts.
5. SYSTEM OPERATION CHECK
After repairing, ensure that the system operates properly.
Selection screen
When the
button is pushed and held, the setting screen for each menu can be displayed.
Select the preferred menu by operating
the "
" or "
" switch.
Top menu
Menu option
Description
Time/Date
Time/Date
Set and adjust the time and date. 12h or 24h f ...
List
BODY CONTROL SYSTEM (DIAGNOSTICS) > Read Current DataLISTItems to be displayedUnit of measureContentNoteBATT voltage (control)10 — 15 VBody integrated unit input valueAlwaysBATT voltage (BACKUP)10 — 15 VBody integrated unit input valueAlwaysIGN Voltage10 — 15 VBody integrated unit input val ...
Inspection
COMMUNICATION SYSTEM > Relay and FuseINSPECTION1. CHECK FUSE1. Remove the fuse and check visually.2. If the fuse is blown out, replace the fuse.2. CHECK RELAY1. Check the resistance between relay terminals.Terminal No.Inspection conditionsSpecificationCircuit1 — 2Always1 M? or more1 — 2Apply ...