Pinpoint Test AA: P1112
Pinpoint AA Index
AA1: RETRIEVE DTCS
AA2: CHECK IAT 2 SENSOR RANGE
AA3: CHECK CONTINUITY HARNESS
AA4: CHECK CONTINUITY HARNESS
AA5: END
AA1 RETRIEVE DTCS
Note: Battery and or ECM disconnection prior to scanning will erase all data, ensure that the correct DTC is present.
2. Connect scan tool
3. Record DTC(s), freeze frame data
GO to AA2
AA2 CHECK IAT 2 SENSOR RANGE
Note: Use a refrigerator, freezer or freeze spray so that the operation of the sensor can be checked at temperatures below the ambient test temperature.
1. Ignition switch to position 0
2. Disconnect PI003. Below air intake
3. Measure the resistance between sensor pins 1 and 2; refer to temperature/resistance relationship graph.
Relationship OK?
Yes: Go to AA3
No: Remove sensor and check for correct temperature/resistance relationship at ambient temperature. Repeat checks for at least 3 different temperatures. Renew as necessary and test the system for normal operation.
AA3 CHECK CONTINUITY HARNESS
1. Ignition switch to position 0
2. Disconnect EM012. Inside ECM housing
3. Disconnect PI003. Below air intake
4. With EM012 and PI003 disconnected, measure the resistance between EM012/007 and PI003/002.
Is the resistance less than 0.5 Ohms?
Yes: Go to AA4
No: Inspect harness/connector EM012, PI003 and PI001. Repair as necessary and test the system for normal operation.
AA4 CHECK CONTINUITY HARNESS
Note: To avoid a spurious result, disconnect connectors: EM011 (ECM), and PI042 and PI006 (electronic throttle body).
1. Ignition switch to position 0
2. Disconnect EM010. Inside ECM housing
3. Disconnect PI003. Below air intake
3 Measure the resistance between EM010/020 and IAT 2 sensor connector PI003/001.
Is the resistance less than 0.5 Ohms?
Yes: Go to AA5
No: Inspect splices EMS002 and PIS01. Repair as necessary.
Reconnect all connectors and test the system for normal operation.
AA5 END
1. Perform appropriate service drive cycle and check for the presence of DTC.
Has the fault code cleared?
Yes: STOP
No: Contact Jaguar Service