Suzuki Grand Vitara JB627. Manual - part 111
1H-6 Ignition System:
Repair Instructions
Ignition Timing Inspection
S6JB0B1806001
NOTE
Before starting engine, place transmission
gear shift lever in “Neutral” (shift selector
lever to “P” range for A/T model), and set
parking brake.
1) Start engine and warm it up to normal operating
temperature.
2) Make sure that all of electrical loads except ignition
are switched OFF.
3) Check to be sure that idle speed is within
specification referring to “Idle Speed and IAC
Throttle Valve Opening Inspection in Section 1A”.
4) Connect SUZUKI scan tool to DLC (1) with ignition
switch OFF, restart engine and fix ignition timing by
using fixed spark mode of SUZUKI scan tool.
Special tool
(A): SUZUKI scan tool
5) Set timing light to ignition harness for No.1 cylinder.
6) Using timing light, check that timing observed from
viewpoint is within specification.
Initial ignition timing
Fixed with SUZUKI scan tool: 5
± 1° BTDC
Ignition order
1-6-5-4-3-2
Special tool
(A): 09930–76420
7) If ignition timing is out of specification, check the
followings.
• CKP sensor
• CKP sensor plate
• TP sensor
• CMP sensor
• CMP sensor rotor tooth of camshaft
• Wheel speed sensor (VSS)
• Timing chain cover installation
8) After checking initial ignition timing, release ignition
timing fixation by using scan tool.
9) With engine idling (throttle opening at closed position
and vehicle stopped), check that ignition timing is
about 10
°– 16° BTDC. (Constant variation within a
few degrees from 10
° – 156° BTDC indicates no
abnormality but proves operation of electronic timing
control system.) Also, check that increasing engine
speed advances ignition timing.
If the check results are not satisfactory, check CKP
sensor and ECM.
(A)
1
I5JB0A510016-01
1. Timing mark on crankshaft pulley
I6JB01180004-02