Table 8, Trouble - shooting Chart
Should these complaints arise, the marked test steps must be examined more closely.
Customer Complaint
| Starter turns, engine starts poorly or not at all | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Engine starts, but then stalls | ||||||||||||||
| Idling problems (speed, exhaust) | ||||||||||||||
| Poor throttle response, transitional trouble | ||||||||||||||
| Engine misfiring (ignition, fuel injection) | ||||||||||||||
| Poor engine output / no top speed | ||||||||||||||
| Fuel consumption too high | ||||||||||||||
| Engine diesels | ||||||||||||||
| Engine pings, knocks | ||||||||||||||
| Engine gets too hot | ||||||||||||||
| Engine stalls at traffic lights | ||||||||||||||
| Telltale on permanently or intermittently | ||||||||||||||
| Possible Causes | Test Step No.: | Trouble Codes | ||||||||||||
| · | · | BATTERY VOLTAGE | 01 | 49 | ||||||||||
| · | · | · | · | · | · | · | · | · | COOLANT TEMP. | 02 | 14, 15 | |||
| · | · | · | · | · | · | · | MASS AIR FLOW S. | 03 | 33, 34 | |||||
| · | · | · | · | · | · | · | IDLE AIR CONTROL | 04 | 35 | |||||
| · | · | · | · | · | · | · | · | TPS SIGNAL | 05 | 21, 22 | ||||
| · | · | · | · | · | ENGINE SPEED | 06 | 19 | |||||||
| · | · | · | · | · | · | O2 SENSOR, O2 INTEGRATOR | 10, 11 | 13, 44, 45 | ||||||
| · | · | · | · | · | · | O2 BLM CELL NO., O2 BLM CELL CONT | 13, 14 | 13, 44, 45 | ||||||
| · | · | · | · | · | · | · | · | AIR FUEL RATIO | 17 | 13, 44, 45 | ||||
| · | · | · | · | · | · | POWER ENRICHMENT | 18 | |||||||
| · | · | CLEAR FLOOD MODE | 19 | |||||||||||
| · | · | · | DEC. FUEL CUTOFF | 20 | ||||||||||
| · | · | · | · | · | · | FUEL TANK VENT. | 21 | 93 | ||||||
| · | · | · | · | · | · | VEHICLE SPEED, VEHICLE SP. PULSE | 27, 28 | 24 | ||||||
| · | · | · | KNOCK PULSES | 29 | 18 | |||||||||
| · | · | · | · | · | · | · | · | KNOCK VOLTAGE | 30 | 16 | ||||
| · | · | · | KNOCK RTD. CYL. 1, KNOCK RTD. CYL. 2 | 32,033 | 18 | |||||||||
| · | · | · | KNOCK RTD. CYL.3 3, KNOCK RTD. CYL.4 | 34, 35 | 18 | |||||||||
| · | · | · | · | · | · | · | · | · | INJECTION PULSE | 36 | 25, 81 | |||
| · | · | · | · | · | · | · | · | · | · | · | SPARK ADVANCE | 37 | 42, 64, 41, 63 | |
| · | DIAG. REQUEST, | |||||||||||||
| Read out trouble code in mode F2 | 38 | |||||||||||||
| · | · | DES. IDLE ADJUST, IDLE ADJUST | 39, 40 |