Engine Electrical System Troubleshooting; Troubleshooting Guide - Mazda 626 MX-6 Workshop Manual

5 TROUBLESHOOTING GUIDE

TROUBLESHOOTING GUIDE
Problem
Starter does not
Battery and related parts
turn at all, or turns
Poor contact of battery terminal(s)
too slow to start
Poor grounding of negative cable
engine
Voltage drop caused by discharged battery
Insufficient voltage caused by battery malfunction
Ignition switch and related parts
Poor contact of ignition switch
Loose ignition switch wiring or connector
Broken wire between ignition switch and magnetic
switch
Magnetic switch and related parts
Loose wiring and/or connectors
Burnt magnetic switch contact plate or improper
contact
Broken wire in magnetic switch pull-in coil
Broken wire in magnetic switch holding coil
Starter motor and related parts
Poor contact of brushes
Fatigued brush spring
Commutator malfunction
Grounded armature
Worn parts
Starter inter-lock switch
Short circuit of inter-lock system
Starting problem Insufficient battery capacity
Malfunction of spark plug(s)
Loose primary wiring
Damaged distributor cap or rotor
Ignition coil malfunction
Igniter malfunction
Starter turns but
Tip of overrunning clutch pinion worn
engine does not
Weakened overrunning clutch drive spring
turn
Worn overrunning clutch
Binding on spline
Worn brushing
Worn ring gear
Starter motor Sticking contact plate of magnetic switch
turns continuously Layer shorting of coil of magnetic switch
(does not stop) Ignition switch does not return
Misfiring of engine Dirty, damaged or worn spark plug(s)
Malfunction of wiring or poor wiring contact
Damaged distributor cap
Discharging of
Loose V-belt
battery
Grounded or broken stator coil
Broken rotor coil
Poor contact of brush and slip ring
Malfunction of rectifier
Malfunction of 1C regulator
Insufficient or unsuitable battery electrolyte
Malfunction of battery electrode (internal short circuit)
Poor contact of battery terminal(s)
Excessive electric load
Overcharging of 1C regulator malfunction
battery
Poor acceleration Mis-adjusted ignition timing
Distributor malfunction
Knocking Mis-adjusted ignition timing
Distributor malfunction
5—4
Probable Cause
Remedy
Page
Clean and tighten
5 - 5
Clean and repair 5 - 5
Recharge 5— 5
Replace
5 - 5
Replace Section 15
Repair
Repair or replace
Repair 5 -2 6
Replace 5 -2 6
Replace 5 -2 6
Replace
5 -2 6
Adjust contact or 5 -2 8
replace
Replace 5 -2 8
Repair
5 -2 5
Replace 5 -2 5
Replace 5 -2 5
Replace 5 -4 2
Recharge 5 - 5
Clean, adjust or 5 -3 2
replace
Tighten
5 -3 3
Replace 5 -3 8
Replace
5 -3 3
Replace 5 -4 1
Replace 5 -2 7
Replace
5 -2 7
Replace 5 -2 7
Replace
5 -2 7
Replace 5 -2 8
Replace Section 6
Replace 5 -2 6
Replace 5 -2 6
Replace Section 15
Clean or replace 5 -3 2
Section 15
Replace
Replace
5 -3 8
Adjust
5 -2 0
Replace 5 -1 6
Replace
5 -1 6
Clean or replace 5 -1 7
Replace 5 -1 8
Replace
Adjust
5 - 5
Replace
5 - 5
Clean and tighten 5— 5
Check power con­ 5— 5
sumption
Replace
Adjust 5 -3 4
Repair or replace 5 -3 8
Adjust 5 -3 4
Repair or replace 5 -3 8
86U05X-004