Dtc P1480: Defective Particulate Filter Inlet Pick-Off Failures Malfunction; Dtc P1641: Additional Heater Relay No.1 Control Circuit - Suzuki GRAND VITARA 2005 Service Manual

1A-82 Engine General Information and Diagnosis:

DTC P1480: Defective Particulate Filter Inlet Pick-Off Failures Malfunction

NOTE
• Conditions for applying fault finding procedures to stored faults:
The fault is declared present after the engine is started or following a road test.
• If the fault is present:
– The Injection warning light (gravity 1 warning light) is lit.
– The diagnostic of the diesel particulate filter is inhibited.
– Diesel particulate filter regenerations are inhibited.
Detecting Condition
Displaying on SUZUKI scan tool
1.DEF
Troubleshooting
Check the condition of the following pressure pipes:
• Differential pressure sensor upstream side pipe
Check that the pipe is not crushed, blocked or pierced.
Check the correct position and connection on the differential pressure sensor.
Replace the differential pressure sensor upstream side pipe if necessary.

DTC P1641: Additional Heater Relay No.1 Control Circuit

NOTE
• Conditions for applying fault finding procedures to stored faults:
The fault is declared present after the engine is started.
• 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
CO.0
CO.1
Troubleshooting for CO.0: Open circuit or short circuit to vehicle body ground
Check the condition of the additional heater relay No.1.
Check the ECM connections.
Repair if necessary.
Check the additional heater relay No.1 mounting connections.
If these checks are correct,
Check the continuity and insulation from vehicle body ground of the following connections:
• Between "C93-5" wire of additional heater relay No.1 mounting connector and "C86-39" terminal of ECM
connector
• Between "C93-1" wire of additional heater relay No.1 mounting connector and "E33-6" wire of main relay
connector
Repair if necessary.
If the fault is still present, substitute a known-good ECM and recheck.
Detecting condition
Inconsistency of signal
Detecting condition
Open circuit or short circuit to vehicle body ground
Short circuit to +12 V
S5JB0B1104134
S5JB0B1104146