Dtc P0100: Mass Or Volume Air Flow Circuit Malfunction - Suzuki GRAND VITARA 2005 Service Manual

1A-32 Engine General Information and Diagnosis:

DTC P0100: Mass or Volume Air Flow Circuit Malfunction

NOTE
• Conditions for applying the fault finding procedure to stored faults:
The fault is declared present after a road test.
• If the fault is present, the Injection warning light (gravity 1 warning light) is lit.
• Use service wire for all operations on the ECM connectors.
• Priorities when dealing with a number of faults:
As a priority, deal with fault "DTC P0697: Sensor Reference Voltage "C" Circuit / Open Malfunction: "
if the fault is present or stored.
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
CO.0
1.DEF
2.DEF
Troubleshooting for CC.1: Short circuit to +12 V
Check the MAF sensor assembly with IAT sensor connections.
Check the ECM connections.
Repair if necessary.
Check the continuity and the insulation against +12 V of the following connections:
• Between "C13-2" wire of MAF sensor assembly with IAT sensor connector and "C86-24" terminal of ECM
connector
• Between "C13-6" wire of MAF sensor assembly with IAT sensor connector and "C86-12" terminal of ECM
connector
• Between "C13-5" wire of MAF sensor assembly with IAT sensor connector and "C86-47" terminal of ECM
connector
If the fault is still present, replace the MAF sensor assembly with IAT sensor.
Troubleshooting for CO.0: Open circuit or short circuit to vehicle body ground
Check there is a +5 V supply on "C13-5" wire of the MAF sensor assembly with IAT sensor connector.
Repair if necessary.
Check the MAF sensor assembly with IAT sensor connections.
Check the ECM connections.
Repair if necessary.
Check the continuity and insulation from vehicle body ground between:
• Between "C13-2" wire of MAF sensor assembly with IAT sensor connector and "C86-24" terminal of ECM
connector
• Between "C13-5" wire of MAF sensor assembly with IAT sensor connector and "C86-47" terminal of ECM
connector
• Between "C13-6" wire of MAF sensor assembly with IAT sensor connector and "C86-12" terminal of ECM
connector
• Between "C13-4" wire of MAF sensor assembly with IAT sensor connector and "E33-6" terminal of main
mounting connector
Repair if necessary.
If the fault is still present and remains present, replace the MAF sensor assembly with IAT sensor.
Detecting condition
Short circuit to +12 V
Open circuit or short circuit to vehicle body ground
Offset at maximum threshold
Offset at minimum threshold
S5JB0B1104092