Circuit Inspection
| Inspection Condition | (+) Probe | (-) Probe | Reference | ||
|---|---|---|---|---|---|
| Connector | Terminal | Connector | Terminal | ||
|
A/C control module connector | 22 (ON/START Input) | Chassis ground | - | B+ |
| A/C control module connector | 21 (ON Input) | Chassis ground | - | B+ | |
| A/C control module connector | 1 (Memory power) | Chassis ground | - | B+ | |
|
A/C control module (auto) connector | 32/40 (ground) | Chassis ground | - | Approx. below 1Ω |
| A/C control module (manual) connector | 16/32 (ground) | Chassis ground | - | Approx. below 1Ω | |
| ECM connector | 85 (P-CAN high) | A/C control module (auto) connector | 33 (P-CAN high) | Approx. below 1Ω | |
| A/C control module (manual) connector | 23 (P-CAN high) | ||||
| ECM connector | 63 (P-CAN low) | A/C control module (auto) connector | 34 (P-CAN low) | Approx. below 1Ω | |
| A/C control module (manual) connector | 24 (P-CAN low) | ||||
|
ECM connector | 85 (P-CAN high) | Chassis ground | - | Fig.1 |
| ECM connector | 63 (P-CAN low) | Chassis ground | - | ||
|
A/C control module (auto) connector | 33 (P-CAN high) | A/C control module (auto) connector | 34 (P-CAN low) | Approx. 60Ω |
| A/C control module (manual) connector | 23 (P-CAN high) | A/C control module (manual) connector | 24 (P-CAN low) | Approx. 60Ω | |
| ECM (component side) | 85 (P-CAN high) | ECM (component side) | 63 (P-CAN low) | Approx. 120Ω | |
| ICU (component side) | 12 (P-CAN high) | ICU (component side) | 11 (P-CAN low) | Approx. 120Ω | |
Good
- Fault is intermittent caused by poor contact in the sensor's and/or ECM's connector or was repaired and ECM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "Verification of Repair " procedure.
No Good
- If no problems were found with the circuits or connectors, replace the A/C control module and go to "Verification of Repair " procedure.