Service and Repair Manual
March 2021
Fault Inspection Procedure
164
GS
™
-30 • 32 • 46 • 47
Part No. 1272217GT
Fault Inspection Procedure
1
Check the device associated with the faulted circuit
1 Disconnect the faulted device connector.
2 Using a multi-meter, measure resistance between the two
terminals of the faulted device.
3 Resistance should be as follows.
Device
Typical Resistance
Solenoid Valve, Drive
27.2
Ω
Solenoid Valve, Steer
19
Ω
Solenoid Valve, Platform Up
25
Ω
Solenoid Valve, Platform Down
6.25
Ω
GCON and PCON Alarm
>1M
Ω
Automotive Horn
1.0
Ω
Motor Controller – Enable
5.7k
Ω
Motor Controller – Throttle
5.7k
Ω
Contactor Coil
47
Ω
OK
Go to step 2
No Good
Replace faulted device
2
Check the harness between the ground controls and the faulted device
1 Disconnect the GCON ECM connectors, J1, J2 and J3.
2 Disconnect the faulted device connector.
3 Check the continuity between the GCON ECM connector
and the signal side of the faulted device.
Result: Resistance should be close to 0
Ω
4 Check the continuity between the return side of faulted
device and system ground.
Result: Resistance should be close to 0
Ω
5 Check resistance between return side and signal side of
the harness plug of faulted device.
Result: Resistance should be 1M
Ω
or higher.
OK
Go to step 3
No Good
Replace or repair harness