IQ SYSTEM TROUBLESHOOTING
Test Procedures
11
TEST PROCEDURES
Using the following procedures, the entire IQ electrical system can be tested without major disassembly of the vehicle.
WARNING
• If wires are removed or replaced, make sure wiring and wire harness is properly routed and secured.
Failure to properly route and secure wiring could result in vehicle malfunction, property damage,
personal injury, or death.
For many tests the electronics module cover must be removed to gain access to the various components that are
mounted on the component mounting plate.
See Electronics Module Cover on page 15-5. See following WARNING.
WARNING
• Shorting of battery terminals can cause personal injury or death.
– Do not place component mounting plate directly on top of batteries when removing or installing
plate.
– Remove plate from vehicle completely.
After test procedures are completed, be sure to replace the cover.
See Electronics Module Cover on page 15-5.
See following CAUTION.
CAUTION
• Exposure to water may damage electronic components.
– Do not operate vehicle without the cover properly installed.
– Do not direct a water stream in area of the cover.
Index of Test Procedures
1 – Batteries / Voltage Check
2 – Onboard Computer Solenoid Lockout Circuit
3 – Solenoid Activating Coil
4 – Throttle Position Sensor Voltage
5 – A1 and A2 Motor Voltage
6 – Tow/Run Switch
7 – Battery Pack Voltage (Under Load)
8 – Key Switch and Throttle Position Sensor Limit Switch Circuit
9 – 16-Pin Connector
10 – Pins 1, 2, and 13
11 – Pin 5
12 – Pin 6
13 – Pin 7
14 – Pins 8 and 16
15 – Pin 9
16 – Pin 10
17 – Pin 12
18 – Onboard Computer Silicon-Controlled Rectifier (SCR) Circuit
19 – Onboard Computer Gray Wire
20 – Voltage at Charger Receptacle Red Wire Socket
2009 Electric Precedent Maintenance and Service Manual
Page 11-13
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