Dtc P2600: Turbocharger Electric Water Pump Control Circuit - Suzuki Grand Vitara 2011 Manual

1A-357 Engine General Information and Diagnosis: For Diesel Engine Model

DTC P2600: Turbocharger Electric Water Pump Control Circuit

NOTE
• Conditions for applying the fault finding procedure to stored faults:
The fault is declared present after ignition switch has been turned OFF and after an interval of 40
seconds, or after output test "Turbo charger cooling pump" on SUZUKI scan tool.
• If the fault is present:
– The EGR function is inhibited.
– 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
CO0
CC1
Troubleshooting for CO0: Open circuit or short circuit to vehicle body ground
Check the condition of the "T/C P" fuse on the fuse box No.2.
Check the condition of the turbocharger electric water pump relay.
Check the ECM connections.
Repair if necessary.
Check the turbocharger electric water pump relay mounting connections.
If these checks are correct,
Check the continuity and insulation from vehicle body ground of the following connections:
• Between "E34-10" wire of turbocharger electric water pump relay mounting connector and "C86-41" terminal
of ECM connector
• Between "E34-8" wire of turbocharger electric water pump relay mounting connector and "E33-6" wire of main
relay connector
• Between "E34-6" wire of turbocharger electric water pump relay mounting connector and "E38-1" wire of fuse
box No.2 mounting connector
• Between "E34-7" wire of turbocharger electric water pump relay mounting connector and "C70-2" wire of
turbocharger electric water pump connector
Check for the ground on "C70-1" wire of the turbocharger electric water pump connector.Repair if necessary.
If the fault is still present, substitute a known-good ECM and recheck.
Troubleshooting for CC1: Short circuit to +12 V
Check the condition of the turbocharger electric water pump relay.
Check the ECM connections.
Repair if necessary.
Check the turbocharger electric water pump relay mounting connections.
Check the continuity and insulation from +12 V of the following connection:
• Between "E34-10" wire of turbocharger electric water pump relay mounting connector and "C86-41" terminal
of ECM connector
• Between "C70-1" wire of turbocharger electric water pump connector and vehicle body ground
Repair if necessary.
If the fault is still present, substitute a known-good ECM and recheck.
Detecting condition
Open circuit or short circuit to vehicle body ground
Short circuit to +12 V
S6JB0A1124144