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DTC P1874 4L Switch Circuit Malfunction (Short)
Wiring Diagram
1. 4L/N switch
3. 4WD control module
2. TCM
4. Terminal arrangement of TCM connector (viewed from harness side)
DTC Detecting Condition and Trouble Area
DTC Detecting Condition
Actual transfer position is 4H although TCM detected 4L/N switch
is turned ON with vehicle speed between 29 km/h (18 mile/h) and
88 km/h (55 mile/h). (if equipped with 4L/N switch)
(1 driving cycle detection logic)
DTC Confirmation Procedure
1) Connect scan tool to DLC with ignition switch OFF.
2) Clear DTCs in TCM and ECM memories by using scan tool.
3) Start engine and transfer position switch to "4H" position.
4) Keep engine running at idle speed for 10 seconds or more with select lever "D" range.
5) Start vehicle and increase vehicle speed to about 60 km/h (37 mile/h) for 2 minutes.
6) Stop vehicle.
7) Check DTC, pending DTC and freeze frame data.
DTC Troubleshooting
Step
1
Vehicle speed signal check
1) Check DTC in ECM and ABS/ESP® control module
referring to "DTC Check: in Section 1A in related
manual" or "DTC Check: in Section 4E".
Is there DTC P P0500: Vehicle speed sensor (VSS)
malfunction in ECM and/or DTC C1021, C1022, C1025,
C1026, C1031, C1032, C1035 and/or C1036 in ABS/ESP
control module?
2
Was "A/T System Check" performed?
3
Do you have SUZUKI scan tool?
12V
3
1
PNK/WHT
BLK
E92
6
5
4 3
2
1
16 15 14 13 12 11
10 9
8
7
24 23
22
21
20
19
18 17
Action
Automatic Transmission/Transaxle:
2
12V
E93-4
E93
6
5
4
3
2
1
17 16
15 14
13 12
11 10 9
8 7
21 20 19
18
26 25
24
23 22
• 4L/N switch or its circuit.
• TCM
Yes
Go to applicable DTC
diag. flow.
®
Go to Step 2.
Go to Step 4.
S5JB0E5104044
4
I5JB0A510026-01
Trouble Area
No
Go to Step 2.
Go to "A/T System
Check: in related
manual".
Go to Step 5.
5A-26
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Table of Contents
Troubleshooting
