User's Manual

37
Location Measurement
TCV to TCV Common 7 to 19 Ohms
Release, Hold, Common
to Voltage or Ground
Open Circuit (no continuity)
Troubleshooting Diagnostic Trouble Codes (DTCs):
Traction Control Valves (TCV)
18 Drive Axle Traction Control Valve
19 Steer Axle Traction Control Valve
1st. Blink
Code
Location
Cab-mount ECU:
Looking into wire
harness connector
Traction Control Valve (TCV) Repair Tests:
1. Take all measurements at ECU harness connector pins in order to check wire harness
and traction control valve. Probe the connector carefully so that the terminals are not
damaged.
2. Tractor Control Valve resistance measurements should read:
Connector Pin Traction Control Test
X1
18 Way
4
Drive Axle Traction
Control Valve Common
5
Drive Axle Traction
Control Valve
Connector Pin Traction Control Test
X3
15 Way
3
Steer Axle Traction
Control Valve Common
5
Steer Axle Traction
Control Valve
X4
2nd.
Blink
Code
Diagnostic Trouble
Code Description
Repair Information
1
TCV Solenoid Shorted
to Ground
Verify 7 to 19 ohms between Traction Control Valve (TCV) and TCV
common. Verify no continuity between TCV leads and ground. Check
for corroded/damaged wiring or connectors between the ECU and TCV.
2
TCV Solenoid Shorted
to Voltage
Verify 7 to 19 ohms between TCV and TCV common. Verify no continuity
between TCV leads and voltage. Check for corroded/damaged wiring or
connectors between ECU and TCV.
3
TCV Solenoid Open
Circuit
Verify 7 to 19 ohms between TCV and TCV common. Check for corroded/
damaged wiring or connectors between ECU and TCV.
4
TCV Conguration Error The ECU is not congured for ESP or ATC, but has detected the presence
of a TCV. Verify TCV wiring. Inspect for the presence of a TCV. Verify
the ECU conguration.
NOTE: When troubleshooting Traction
Control Valve DTCs, it may be useful to look
for a potential connection between them and
ECU DTCs (in particular, DTCs 13‑8 and 13‑18
shown on page 36).
ATR valve inspections should include: looking for kinked air hoses; inside the harness socket on the valve for
removed or corroded connector pins; and a test to verify that the ATC valve solenoids are functioning correctly.