User's Manual

30
Troubleshooting Diagnostic Trouble Codes (DTCs):
Pressure Modulator Valves (PMVs)
7 Left Steer Axle
8 Right Steer Axle
9 Left Drive Axle
10 Right Drive Axle
16 Left Additional Axle
17 Right Additional Axle
20 Trailer PMV
1st. Blink
Code
Location
2nd.
Blink
Code
Diagnostic Trouble
Code Description
Repair Information
1
Release Solenoid
Shorted to Ground
Verify no continuity between the PMV leads and ground. Verify 4.9 to 5.5 ohms
from REL to CMN & HLD to CMN, and 9.8 to 11 ohms from REL to HLD. Check
for corroded/damaged wiring or connectors between the Electronic Control Unit
(ECU) and PMV.
2
Release Solenoid
Shorted to Voltage
Verify no continuity between the PMV leads and voltage. Verify 4.9 to 5.5 ohms
from REL to CMN & HLD to CMN, and 9.8 to 11 ohms from REL to HLD. Check
for corroded/damaged wiring or connectors between the ECU and PMV.
3
Release Solenoid
Open Circuit
Verify 4.9 to 5.5 ohms from REL to CMN & HLD to CMN, and 9.8 to 11 ohms from
REL to HLD. Check for corroded/damaged wiring or connectors between the
ECU and PMV.
4
Hold Solenoid Shorted
to Ground
Verify no continuity between the PMV leads and ground. Verify 4.9 to 5.5 ohms
from REL to CMN & HLD to CMN, and 9.8 to 11 ohms from REL to HLD. Check
for corroded/damaged wiring or connectors between the ECU and PMV.
5
Hold Solenoid Shorted
to Voltage
Verify no continuity between the PMV leads and voltage. Verify 4.9 to 5.5 ohms
from REL to CMN & HLD CMN, and 9.8 to 11 ohms from REL to HLD. Check for
corroded/damaged wiring or connectors between the ECU and PMV.
6
Hold Solenoid Shorted
to Open Circuit
Verify 4.9 to 5.5 ohms from REL to CMN & HLD to CMN, and 9.8 to 11 ohms from
REL to HLD. Check for corroded/damaged wiring or connectors between the
ECU and PMV.
7
CMN Open Circuit Verify 4.9 to 5.5 ohms from REL to CMN & HLD to CMN, and 9.8 to 11 ohms from
REL to HLD. Check for corroded/damaged wiring or connectors between the ECU
and PMV. This is potentially a miswired or internal mechanical problem.
8
Conguration Error
A mis‑match exists between the ECU conguration and the modulator installation
and wiring. Verify the PMV wiring and installation. Verify the ECU conguration.
Special Note regarding Trailer PMV: Pneumatic issues can result in this DTC being
set. Verify all lines are free from debris or other obstructions, kinks, etc.