Active Check Control Unit Test
Disconnect plug to control unit. Test input signals at disconnected plug.
ACTIVE CHECK CONTROL UNIT TESTING
| Pins (Wire Colors) |
Conditions |
Specifications |
| 1 & 9 (Vio/Gry) |
Ignition Key @ "R" |
B+ volts @ No. 1 & |
| Ground (-) @ No. 9. |
| 2 & 9 (Brn/Yel) |
Ignition ON |
Completes ground ckt & activates |
| central warning light "ZHL". |
| 3 & 4 (N/A) |
N/A |
Pin No. 3 (-) & No. 4 (+). "OH" light |
| on some models only. |
| 4 & 9 (Grn/Wht) |
Ignition ON |
B+ volts (+) @ No. 4 & |
| Ground (-) @ No. 9. Controls "15" |
| indicator light. |
| 5 & 4 (Blu/Wht) |
Ignition ON |
Ground (-) @ No. 5 & B+ volts |
| @ No. 4. Controls "O2" light. |
| 6 & 9 (N/A) |
N/A |
B+ volts @ No. 6 & Ground (-) @ No. 9 |
| Controls "AB" positive (+) ckt. |
| 7 & 4 (N/A) |
N/A |
B+ volts @ No. 4 & Ground (-) @ No. 7 |
| Controls "AB" Ground (-) ckt. |
| 8 & 4 (Brn/Vio) |
Ignition ON |
B+ volts @ No. 4 & Ground (-) @ |
| No. 8. Controls "FS" signal. |
| 9 & 15 (Brn) |
N/A |
B+ volts @ No. 15 & Ground (-) @ |
| No. 9. Controls "31" ground ckt. |