Dtc P1402 (P0510) Throttle Solenoid Valve Circuit Malfunction - Suzuki Grand Vitara XL-7 Service Manual

6-1-40 ENGINE DIAGNOSIS (RHZ ENGINE WITH TRIPLE-CONNECTOR ECM)

DTC P1402 (P0510) THROTTLE SOLENOID VALVE CIRCUIT MALFUNCTION

WIRING DIAGRAM
DTC CONFIRMATION PROCEDURE
1) Connect scan tool to DLC with ignition switch OFF.
2) Turn ON ignition switch and clear DTC, pending DTC and freeze frame data by using scan tool.
3) Turn off ignition switch and then on.
4) Check DTC and pending DTC by using scan tool.
TROUBLESHOOTING
STEP
1 Was "ENGINE DIAG. FLOW TABLE" performed?
2 Is operating sound heard from fuel pump?
3 Check Wire Harness
1) Disconnect EGR throttle solenoid valve
connector with ignition switch turned OFF.
2) With ignition switch ON, check voltage between
"BLU/WHT" wire terminal of solenoid valve
connector and ground.
D Within 5 sec. after ignition switch ON: 10 – 14 V
D Over 5 sec. after ignition switch ON: about 0 V
Is check result as specified?
4 Check EGR Throttle Solenoid Valve
1) Check solenoid valve referring to Section 6E3.
Is it in good condition?
ACTION
1. Double relay
2. ECM
3. EGR throttle solenoid valve
4. Fuel pump
5. "ENG" fuse (15 A)
6. "FUEL PUMP" fuse (15 A)
YES
Go to Step 2.
Go to Step 3.
Go to Step 4.
D "PPL/BLK" wire
open or shorted to
power /ground
D Poor E229-32
connection
If wire and connection
are OK, substitute a
known-good ECM and
recheck.
NO
Go to "ENGINE DIAG.
FLOW TABLE".
Proceed to DTC
P0230 Diag. Flow
table.
"BLU/WHT" wire
open, shorted to
power /ground or fuse
broken.
Faulty EGR solenoid
valve.