Dtc P0638: Throttle Actuator Control Range / Performance Malfunction - Suzuki GRAND VITARA 2005 Service Manual

DTC P0638: Throttle Actuator Control Range / Performance Malfunction

CAUTION
!
This fault can result in a rapid and significant fouling of the diesel particulate filter.
NOTE
• Conditions for applying fault finding procedures to stored faults:
The fault is declared present after:
– The engine is started.
– A road test.
– Output test "Electronic Throttle valve" on SUZUKI scan tool.
– Turning OFF ignition switch and waiting 40 seconds.
• If the fault is present:
– It is difficult or even impossible to start the vehicle.
– The engine stops noisily.
– The Injection warning light (gravity 1 warning light) is lit.
• Use service wire for all operations on the ECM connectors.
Wiring Diagram
For wiring circuit and connector number, refer to "A-5 Engine and A/C Control System Circuit Diagram (DSL): in
Section 9A".
Detecting Condition
Displaying on SUZUKI scan tool
CC.1
CC.0
C0
CC
1.DEF
2.DEF
3.DEF
Troubleshooting for CC.1: Short circuit to +12 V
NOTE
After any inlet throttle valve procedures, it is necessary to perform "Initialize inlet throttle valve data"
on SUZUKI scan tool. Then turn OFF ignition switch and wait 40 seconds.
Check the connections of the inlet throttle valve.
Check the ECM connections.
Repair if necessary.
Check the continuity and insulation from +12 V of the following connection:
• Between "C75-1" wire of inlet throttle valve connector and vehicle body ground
• Between "C75-3" wire of inlet throttle valve connector and "C86-40" terminal of ECM connector
• Between "C75-4" wire of inlet throttle valve connector and "C86-27" terminal of ECM connector
Repair if necessary.
If the fault persists, replace the inlet throttle valve.
Engine General Information and Diagnosis:
Detecting condition
Short circuit to +12 V
Short circuit to vehicle body ground
Open circuit
Short circuit
Internal electronic fault
External diagnostics
Values out of range
1A-69
S5JB0B1104125