Pin Voltage Tests
Pin voltage test is used to diagnose intermittent symptoms and faults that are unable to be resolved during self-diagnostics. Pin test ensures ECM is receiving and transmitting proper voltage signals. To perform pin voltage test, remove ECM with connectors attached. See Figure. Test ECM voltages by backprobing between appropriate ECM connectors and terminals. See Figure. Use a DVOM and turn ignition switch to ON position, unless otherwise specified. If voltage readings are as specified, ECM may be faulty. See PIN VOLTAGE TESTING table.
PIN VOLTAGE TESTING
| Measure Between Connector/Terminals No. |
Wire Color |
Condition |
Volts |
| E14-20 & E10-17 |
Green/White & Brown |
Depress Brake Pedal |
7.5-14 |
| E14-20 & E10-17 |
Green/White & Brown |
Release Brake Pedal |
Less Than 1.5 |
| E12-22 & E10-17 |
Green & Brown |
All Switch Functions Off |
Battery Voltage |
| E12-22 & E10-17 |
Green & Brown |
ON/OFF (Main) Switch Held On |
Less Than One |
| E12-22 & E10-17 |
Green & Brown |
Cancel Switch Held On |
6-10.1 |
| E12-22 & E10-17 |
Green & Brown |
SET/COAST Switch Held On |
4-7.1 |
| E12-22 & E10-17 |
Green & Brown |
RES/ACC Switch Held On |
2.1-4.0 |
| E14-17 & E10-17 |
Gray & Brown |
Cruise Control ON/OFF (Main) Switch On |
Less Than 3 |
| E14-17 & E10-17 |
Gray & Brown |
Cruise Control ON/OFF (Main) Switch On |
9-14 |
| E12-9 & E10-17 |
Red/Black & Brown |
Depress Brake Pedal |
Less Than 1.5 |
| E12-9 & E10-17 |
Red/Black & Brown |
Release Brake Pedal |
7.5-14 |